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ABSTRACT Vermiculite mining residues, although of low solubility, contain nutrients such as calcium, magnesium, and potassium at concentrations that allow their agricultural use. Beneficial bacteria can increase the solubility of this waste and its efficiency. The objective of the present study was to evaluate the influence of bio-inoculation of vermiculite residue, associated with cattle manure, on the release of nutrients and initial growth of maize. A completely randomized design was performed in a greenhouse with seven treatments and four replications. The treatments were: T1 - soil without fertilization; T2 - soil fertilized with soluble sources of nutrients (conventional fertilization); T3 - application of vermiculite residue (VR); T4 - VR enriched with cattle manure (CM); T5 - VR + CM with Bacillus subtilis; T6 - VR + CM + B. amyloliquefaciens, and T7 - VR + CM +B. subtilis + B. amyloliquefaciens). Regardless of the use of cattle manure or beneficial microorganisms, vermiculite mining waste increased the availability of Ca and K in the soil, but was not able to match the soluble sources of nutrients. Mining waste associated with cattle manure and beneficial microorganisms (B. subtilis and B. amyloliquefaciens) increased microbial activity and enhanced the release of available calcium for maize. VR increased the growth and the dry mass production of maize compared to the non-fertilized soil, but was consistently inferior to conventional fertilizer. residues magnesium efficiency bioinoculation bio inoculation replications were T fertilization fertilization) (VR) (CM) B amyloliquefaciens +B amyloliquefaciens. . (B nonfertilized non fertilizer (VR (CM

RESUMO Os resíduos da mineração de vermiculita, embora de baixa solubilidade, contêm nutrientes como cálcio, magnésio e potássio em concentrações que permitem seu uso agrícola. Bactérias benéficas podem aumentar a solubilidade deste resíduo e sua eficiência. Objetivou-se avaliar a influência da bioinoculação do resíduo de vermiculita, associado ao esterco bovino, na liberação de nutrientes e no crescimento inicial do milho. Foi realizado delineamento inteiramente casualizado em casa de vegetação com sete tratamentos e quatro repetições. Os tratamentos foram: T1 - solo sem adubação; T2 - solo adubado com fontes solúveis de nutrientes (fertilização convencional); T3 - aplicação de resíduo de vermiculita (VR); T4 - VR enriquecido com esterco bovino (CM); T5 -VR+CM com Bacillus subtilis; T6 - VR + CM + B. amyloliquefaciens e T7 - VR + CM + B. subtilis + B. amyloliquefaciens). O VR aumentou a disponibilidade de Ca e K no solo, porém seu desempenho foi inferior às fontes solúveis. Independentemente da utilização de esterco bovino ou de microrganismos benéficos, os resíduos da mineração de vermiculita aumentaram a disponibilidade de Ca e K no solo, mas não foram capazes de igualar as fontes solúveis de nutrientes. Os resíduos de mineração associados ao esterco bovino e aos microrganismos benéficos (B. subtilis e B. amyloliquefaciens) aumentaram a atividade microbiana e aumentaram a liberação de cálcio disponível para o milho. Os resíduos da mineração de vermiculita aumentaram o crescimento e a produção de massa seca do milho em comparação ao solo não fertilizado, mas foram consistentemente inferiores ao fertilizante convencional. agrícola eficiência Objetivouse Objetivou se repetições T adubação fertilização convencional convencional) (VR) (CM) VR+CM VRCM B amyloliquefaciens. . (B fertilizado (VR (CM

https://doi.org/10.1590/1807-1929/agriambi.v28n2e273189

Incidence of childhood cancer in Latin America and the Caribbean: coverage, patterns, and time trends
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de Paula Silva, Neimar

; Colombet, Murielle

; Moreno, Florencia

; Erdmann, Friederike

; Dolya, Anastasia

; Piñeros, Marion

; Stiller, Charles A

; Steliarova-Foucher, Eva

; Steliarova-Foucher, E

; Colombet, M

; Gloeckler Ries, LA

; Moreno, F

; Dolya, A

; Shin, HY

; Hesseling, P

; Stiller, CA

; Moreno, F

; Laura, EA

; Duarte, MA

; Alonso, M

; Prince, MA

; Diumenjo, MC

; Arias Ondicol, N

; Lima, CA

; Mundim Pena, GP

; Asturian Laporte, C

; de Oliveira, JC

; Pontes de Aquino, JA

; Vallebuona, C

; Galaz, JC

; Umaña, ME

; Espinoza, C

; Vargas Gallagher, SM

; Uribe, CJ

; Bravo, LE

; Arias Ortiz, NE

; Yepez Chamorro, MC

; Torres Alvarado, G

; Galán Alvarez, YH

; Martinez Reyes, FC

; Tanca Campozano, J

; Castillo Calvas, JC

; Mendoza Alava, M

; Cueva Ayala, P

; Roué, T

; Deloumeaux, J

; Joachim, C

; Duarte Muñoz, F

; Hanchard, B

; Fajardo-Gutiérrez, A

; Payet, E

; Albújar, PF

; Zavala Zegarra, DE

; Barrios, E

Revista Panamericana de Salud Pública

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2024, Volume 48 elocation e11

Abstract: Es En Pt | Text: Es En Pt | PDF: Es | PDF: En | PDF: Pt

resumen está disponible en el texto completo

ABSTRACT Objective. To provide a comprehensive overview of geographical patterns (2001–2010) and time trends (1993–2012) of cancer incidence in children aged 0–19 years in Latin America and the Caribbean (LAC) and interpret the findings in the context of global patterns. Methods. Geographical variations in 2001–2010 and incidence trends over 1993–2012 in the population of LAC younger than 20 years were described using the database of the third volume of the International Incidence of Childhood Cancer study containing comparable data. Age-specific incidence per million person-years (ASR) was calculated for population subgroups and age-standardized (WSR) using the world standard population. Results. Overall, 36 744 unique cases were included in this study. In 2001–2010 the overall WSR in age 0–14 years was 132.6. The most frequent were leukemia (WSR 48.7), central nervous system neoplasms (WSR 23.0), and lymphoma (WSR 16.6). The overall ASR in age group 15–19 years was 152.3 with lymphoma ranking first (ASR 30.2). Incidence was higher in males than in females, and higher in South America than in Central America and the Caribbean. Compared with global data LAC incidence was lower overall, except for leukemia and lymphoma at age 0–14 years and the other and unspecified tumors at any age. Overall incidence at age 0–19 years increased by 1.0% per year (95% CI [0.6, 1.3]) over 1993–2012. The included registries covered 16% of population aged 0–14 years and 10% of population aged 15–19 years. Conclusions. The observed patterns provide a baseline to assess the status and evolution of childhood cancer occurrence in the region. Extended and sustained support of cancer registration is required to improve representativeness and timeliness of data for childhood cancer control in LAC.

RESUMO Objetivo. Apresentar uma visão abrangente dos padrões geográficos (2001 a 2010) e das tendências temporais (1993 a 2012) da incidência de câncer em crianças e jovens de 0 a 19 anos na América Latina e no Caribe (ALC) e interpretar os resultados no contexto de padrões mundiais. Métodos. Foram descritas variações geográficas de 2001 a 2010 e tendências de incidência de 1993 a 2012 na população com menos de 20 anos da ALC usando informações comparáveis da base de dados do terceiro volume do estudo International Incidence of Childhood Cancer. Foram calculadas taxas de incidência específica por idade por milhão de pessoas-ano (ASR, na sigla em inglês) para subgrupos populacionais e taxas padronizadas por idade usando a população padrão mundial (WSR, na sigla em inglês). Resultados. No total, foram incluídos 36 744 casos únicos. No período de 2001 a 2010, a WSR para todos os tumores combinados na faixa etária de 0 a 14 anos foi de 132,6. Os diagnósticos mais frequentes foram leucemia (WSR de 48,7), neoplasias do sistema nervoso central (WSR de 23,0) e linfoma (WSR de 16,6). A ASR para todos os tumores combinados na faixa etária de 15 a 19 anos foi de 152,3, e a maior taxa foi a de linfoma (ASR de 30,2). A incidência foi maior no sexo masculino do que no sexo feminino e maior na América do Sul do que na América Central e no Caribe. De modo geral, em comparação com as estimativas mundiais, a incidência na ALC foi menor, exceto para leucemia e linfoma entre 0 e 14 anos e para outros tumores e tumores não especificados em qualquer idade. A taxa de incidência na faixa etária de 0 a 19 anos aumentou em 1,0% ao ano (IC de 95% [0,6, 1,3]) entre 1993 e 2012. Os registros incluídos cobriam 16% da população de 0 a 14 anos e 10% da população de 15 a 19 anos. Conclusões. Os padrões observados servem de referência para avaliar o status e a evolução da ocorrência de câncer infantil na região. É necessário garantir um apoio ampliado e consistente aos registros de câncer para aprimorar a representatividade e a disponibilidade das informações em tempo adequado para o controle do câncer infantil na ALC.

https://doi.org/10.26633/rpsp.2024.11

Defining management zones for a papaya culture considering soil chemical attributes by fuzzy c-means cmeans c means
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Oliveira, Fabricia Benda de

; Lima, Julião Soares de Souza

; Oliveira, Carlos Henrique Rodrigues de

; Sturião, Walas Permanhane

; Angelos, Jacyelli Sgranci

Revista Ambiente & Água

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2024, Volume 19 elocation e2959

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract In precision agriculture, one of the major problems is the need for a dense sampling grid. A solution to this problem has been the generation of management zones and the correlation between them. This work aims at defining management zones for a papaya culture using the fuzzy C-means grouping method, based on the following soil attributes: phosphorus, calcium, magnesium and potassium; and base saturation. The work was conducted in an approximately 1.2 ha area planted with a commercial culture of Carica papaya L. cultivated in typical Argisol found on the coastal terraces, in the municipality of São Mateus, ES, Brazil. The management zones were defined by the proposed method, based on the following analyses: soil chemical parameters P, Ca, Mg, and base saturation (V), analyzed together; soil chemical parameters P, Ca, Mg, and V, analyzed separately; and, the following combinations of soil chemical attributes Ca-Mg, Ca-V, Ca-Mg-V, P-Ca, P-Mg, P-V, P-Ca-Mg, P-Ca-V, Mg-V, and P-Ca-Mg-V. The generated management zones facilitated an understanding of the spatial variability of the attributes in the study area and the observed similarities between management zones generated from different attributes. In addition, the data were influenced especially by the P and V% attributes. agriculture grid them Cmeans C means method phosphorus calcium potassium 12 1 2 1. L terraces Mateus ES Brazil analyses Ca Mg V , (V) together separately CaMg, CaMg Ca-Mg CaV, CaV Ca-V CaMgV, CaMgV Ca-Mg-V PCa, PCa P-Ca PMg, PMg P-Mg PV, PV P-V PCaMg, PCaMg P-Ca-Mg PCaV, PCaV P-Ca-V MgV, MgV Mg-V PCaMgV. PCaMgV V. P-Ca-Mg-V addition (V

Resumo Na agricultura de precisão, um dos maiores problemas é a necessidade de uma grade amostral densa. Uma solução para este impasse tem sido a geração de zonas de gestão e a correlação entre elas. Este trabalho tem como objetivo definir zonas de manejo para a cultura do mamoeiro utilizando o método de agrupamento fuzzy C-means, baseado nos seguintes atributos do solo: fósforo, cálcio, magnésio e potássio; e saturação de bases. O trabalho foi conduzido em uma área de aproximadamente 1,2 ha plantada com cultura comercial de Carica papaya L. cultivada em Argissolo típico encontrado em terraços costeiros, no município de São Mateus, ES, Brasil. As zonas de manejo foram definidas pelo método proposto, com base nas seguintes análises: parâmetros químicos do solo P, Ca, Mg e saturação por bases (V), analisados em conjunto; parâmetros químicos do solo P, Ca, Mg e V, analisados separadamente; e, as seguintes combinações de atributos químicos do solo Ca-Mg, Ca-V, Ca-Mg-V, P-Ca, P-Mg, P-V, P-Ca-Mg, P-Ca-V, Mg-V, e P-Ca-Mg-V. As zonas de manejo geradas permitiram explicar a variabilidade espacial dos atributos na área de estudo e as semelhanças observadas entre as zonas de manejo geradas a partir de diferentes atributos, além disso, os dados foram influenciados especialmente pelos atributos P e V%. precisão densa elas Cmeans, Cmeans C means, means C-means fósforo cálcio potássio 12 1 2 1, L costeiros Mateus ES Brasil proposto análises Ca V , (V) conjunto separadamente CaMg, CaMg Mg, Ca-Mg CaV, CaV Ca-V CaMgV, CaMgV Ca-Mg-V PCa, PCa P-Ca PMg, PMg P-Mg PV, PV P-V PCaMg, PCaMg P-Ca-Mg PCaV, PCaV P-Ca-V MgV, MgV Mg-V PCaMgV. PCaMgV V. P-Ca-Mg-V disso V% (V

https://doi.org/10.4136/ambi-agua.2959

Soil acidity levels for blackberry liming recommendation and yield increase
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Silva, Enilson de Barros

; Lima, Ramony Cristina

; Gaurat, Jéssica Oliveira

; Braga Neto, Ari Medeiros

; Cruz, Maria do Céu Monteiro da

; Bié, Dalila Costa Aparecida

; Gonçalves, Emerson Dias

; Silva, Luiz Fernando de Oliveira

; Moura, Pedro Henrique Abreu

; Souza, Shirley Macedo de

Pesquisa Agropecuária Brasileira

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2024, Volume 59 elocation e03398

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract The objective of this work was to determine the acidity levels to obtain adequate soil chemical attributes for the maximum fruit yield of blackberry trees grown in acidic soils subjected to increasing limestone rates. The BRS Tupy, Brazos, Guarani, and BRS Xavante blackberry cultivars were evaluated on the Typic Hapludox (LVdf) and Rhodic Hapludox (LVd) soils, to which four rates of dolomitic limestone were applied (0, 1.5, 3.0, and 6.0 Mg ha-1). The effect of liming on soil chemical attributes, in a 2×4 factorial arrangement (soils and limestone rates), as well as leaf nutrient content and fruit yield, in a 2×4×4 factorial arrangement (soils, limestone rates, and cultivars), were evaluated. The maximum fruit yield was obtained with 3.3 Mg ha-1 dolomitic limestone. The blackberry cultivars showed a high demand for Ca, Mg, and base saturation and a low tolerance to aluminum in the soils. From 3.3 Mg ha-1 dolomitic limestone, the maximum fruit yield of blackberry trees grown in acidic soils is obtained with pH 5.6, maximum tolerated aluminum saturation of 6%, Ca and Mg concentration of 45.3 mmolc kg-1, and base saturation of 48.3%. Tupy Brazos Guarani LVdf (LVdf LVd (LVd 0, 0 (0 15 1 5 1.5 30 3 3.0 60 6 6. ha1. ha1 ha . ha-1) 24 2 4 2× , rates) 244 2×4× cultivars, cultivars) 33 3. ha- 56 5.6 6% 453 45 45. kg1, kg1 kg 1, kg-1 483 48 48.3% ( 1. 5. kg- 48.3 48.

Resumo O objetivo deste trabalho foi determinar os níveis de acidez para obter os atributos químicos do solo adequados à máxima produção de frutos de amoreiras-pretas cultivadas em solos ácidos submetidos a doses crescentes de calcário. Foram avaliadas as cultivares de amoreira-preta BRS Tupy, Brazos, Guarani e BRS Xavante nos solos Latossolo Vermelho Distroférico (LVdf) e Latossolo Vermelho distrófico (LVd), aos quais foram aplicadas quatro doses de calcário dolomítico (0, 1,5, 3,0 e 6,0 Mg ha-1). Foram avaliados o efeito da calagem sobre os atributos químicos do solo, em arranjo fatorial 2×4 (solos e doses de calcário), bem como o teor de nutrientes foliares e a produção de frutos, em arranjo fatorial 2×4×4 (solos, doses de calcário e cultivares). A produção máxima de frutos foi obtida com 3,3 Mg ha-1 de calcário dolomítico. As cultivares de amoreira-preta apresentaram alta demanda por Ca, Mg e saturação por bases e baixa tolerância ao alumínio nos solos. A partir de 3,3 Mg ha-1 de calcário dolomítico, a produção máxima de frutos de amoras-pretas cultivadas em solos ácidos é obtida com pH 5,6, saturação máxima tolerada de alumínio de 6%, concentração de Ca e Mg de 45,3 mmolc kg-1 e saturação por bases de 48,3%. amoreiraspretas amoreiras pretas amoreirapreta amoreira preta Tupy Brazos LVdf (LVdf LVd, LVd , (LVd) 0, 0 (0 15 1 5 1,5 30 3 3, 60 6 6, ha1. ha1 ha . ha-1) 24 2 4 2× calcário, calcário) 244 2×4× solos, cultivares. cultivares) 33 ha- amoraspretas amoras 56 5,6 6% 453 45 45, kg1 kg kg- 483 48 48,3% (LVd ( 1, 5, 48,3 48,

https://doi.org/10.1590/s1678-3921.pab2024.v59.03398

Nutrient parameters limiting banana plant development in Vale do Ribeira, São Paulo State, Brazil Ribeira State
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Oliveira, Cibelle Tamiris de

; Rozane, Danilo Eduardo

; Lima Neto, Antonio João de

; Natale, William

Ciência Rural

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2024, Volume 54 N. 6 elocation e20220410

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT: Vale do Ribeira is one of the largest banana producing regions in Brazil. However, information on soil fertility and nutrient status that could limit fruit production remains scarce. Thus, the present study diagnosed the most limiting nutrient parameters for the Nanica and Prata banana cultivars, in Vale do Ribeira, São Paulo State, based on soil and leaf chemical analyses. The data assessed included samples from commercial plantations in the municipalities of Eldorado, Cajati, Jacupiranga, Pariquera-açú, Registro and Sete Barras, between 2012 and 2020. The results of soil (pH, V, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn) and leaf chemical analyses (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn) were interpreted according to literature values and their maximums, minimums, means, coefficients of variation (CV), and confidence intervals (CI) were calculated at P < 0.05. Parameter classes were assessed according to their frequency distribution. A large part of the samples exhibited pH and V values similar to those recommended for banana plants. Although, average soil nutrient concentrations were considered high, soil K, Mg and S levels did not provide adequate banana plant nutrition, since these nutrients were deficient in the plants. ABSTRACT Brazil However scarce Thus cultivars State Eldorado Cajati Jacupiranga Pariqueraaçú, Pariqueraaçú Pariquera açú, açú Pariquera-açú Barras 201 2020 pH, (pH K Ca B Cu Fe Zn N, N (N maximums minimums means CV, CV , (CV) CI (CI 005 0 05 0.05 distribution plants Although high nutrition 20 202 (CV 00 0.0 2 0.

RESUMO: O Vale do Ribeira é uma das maiores regiões produtoras de banana do Brasil. Contudo, ainda são escassas informações sobre a fertilidade do solo e o estado nutricional das plantas que possam limitar a produção da fruta na região. Deste modo, o presente trabalho objetivou diagnosticar os parâmetros nutricionais mais limitantes para as cultivares de bananeira, Nanica e Prata, no Vale do Ribeira - SP, a partir de laudos de análises químicas de solo e folha. Os dados avaliados compreenderam amostragens realizadas em pomares comerciais, nos municípios de Eldorado, Cajati, Jacupiranga, Pariquera-açú, Registro e Sete Barras entre os anos 2012 e 2020. Os resultados das análises químicas de solo (pH, V, P, K, Ca, Mg, S, B, Cu, Fe, Mn e Zn) e folha (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn e Zn) foram interpretados de acordo com valores disponíveis na literatura e calculados seus valores máximos, mínimos, médias, coeficientes de variação (CV) e intervalos de confiança (IC) a P < 0.05. As classes de interpretação dos parâmetros foram avaliadas de acordo com sua distribuição de frequência. Grande parte das amostras apresentaram valores de pH e V próximos aos indicados para a bananeira. As concentrações de nutrientes no solo, em média, foram consideradas altas, no entanto, para K, Mg e S, a concentração no solo não refletiu em adequada nutrição da bananeira, estando esses nutrientes deficientes na planta. RESUMO Brasil Contudo região modo bananeira Prata SP comerciais Eldorado Cajati Jacupiranga Pariqueraaçú, Pariqueraaçú Pariquera açú, açú Pariquera-açú 201 2020 pH, (pH K Ca S B Cu Fe Zn N, N (N máximos mínimos médias CV (CV IC (IC 005 0 05 0.05 frequência média altas entanto planta 20 202 00 0.0 2 0.

https://doi.org/10.1590/0103-8478cr20220410

Efects of bone meal and hydrogel on the leaf contents of dwarf cashew
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Costa, José Eldo

; Sousa, Valéria Fernandes de Oliveira

; Pereira, Walter Esfrain

; Maia Júnior, Sebastião de Oliveira

; Serrano, Luiz Augusto Lopes

; Lima, Rosiane de Lourdes Silva de

Pesquisa Agropecuária Tropical

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2024, Volume 54 elocation e77071

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT In semi-arid regions, where seasonal drought or irregular rainfall distribution are common occurrences, agricultural management techniques or strategies, such as the use of bone meal and/or hydrogel, can mitigate adverse conditions and ensure crop production. This study aimed to evaluate the efects of bone meal doses (0, 250, 500, 750 and 1,000 g pit−1), in association or not with hydrogel (0 and 5 g pit−1, respectively), on the leaf nutrient content of the dwarf cashew cultivar BRS 226. The leaf nutrient contents were evaluated during two growing seasons. For being a good source of macronutrients, the bone meal increased the levels of N, P, Ca, K and Mg in the dwarf cashew leaves. The leaf contents of the micronutrients Zn, Fe and Mn decreased with increasing bone meal doses. The nutrient accumulation in the leaves of the dwarf cashew planted in pits with bone meal and hydrogel has the following order: N > K > Ca > Mg > P > Mn > Fe > Zn > Cu. The application of bone meal at levels close to 600 g pit−1, mainly with the use of hydrogel, is a viable fertilizer alternative for dwarf cashew. semiarid semi arid regions occurrences strategies andor production 0, 0 250 500 75 1000 1 000 1,00 pit1 pit pit−1 , pit−1) ( respectively, respectively respectively) 226 seasons macronutrients order Cu 60 25 50 7 100 00 1,0 pit− 22 6 2 10 1,

RESUMO Em regiões semiáridas, onde a seca sazonal ou a distribuição irregular de chuvas são ocorrências comuns, técnicas ou estratégias de manejo agrícola, como o uso de farinha de osso e/ou hidrogel, podem mitigar condições adversas e garantir a produção agrícola. Objetivou- se avaliar os efeitos de doses de farinha de osso (0, 250, 500, 750 e 1,000 g cova−1), em associação ou não com hidrogel (0 e 5 g cova−1, respectivamente), sobre o teor de nutrientes foliares da cultivar de cajueiro-anão BRS 226. Os teores de nutrientes nas folhas foram avaliados durante duas safras. Por ser boa fonte de macronutrientes, a farinha de osso aumentou os níveis de N, P, Ca, K e Mg nas folhas do cajueiro anão. Os teores foliares dos micronutrientes Zn, Fe e Mn diminuíram com o aumento das doses de farinha de osso. O acúmulo de nutrientes nas folhas do cajueiro anão plantado em covas com farinha de osso e hidrogel tem a seguinte ordem: N > K > Ca > Mg > P > Mn > Fe > Zn > Cu. A aplicação de farinha de osso em níveis próximos a 600 g cova−1, principalmente com o uso de hidrogel, é uma alternativa viável de fertilizante para cajueiro-anão. semiáridas comuns agrícola eou Objetivou 0, 0 250 500 75 1000 1 000 1,00 cova1 cova cova−1 , cova−1) ( respectivamente, respectivamente respectivamente) cajueiroanão 226 safras macronutrientes ordem Cu 60 cajueiroanão. 25 50 7 100 00 1,0 cova− 22 6 2 10 1,

https://doi.org/10.1590/1983-40632024v5477071

Morphological comparison of the larynx and trachea of Chelonia mydas (Linnaeus, 1758), Caiman yacare (Daudin, 1802) and Caiman latirostris (Daudin, 1802) Linnaeus, Linnaeus (Linnaeus 1758, 1758 , 1758) Daudin, Daudin (Daudin 1802 175 180 17 18 1
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LIMA, MARIANA O.

; GORZA, LEONARDO L.

; BORGES, EDUARDO JOSÉ S.

; PAULA, VIVIANE T. DE

; NUNES, LOUISIANE C.

; NÓBREGA, YHURI C.

; FIGUEIREDO, RODRIGO G.

; SILVA, MARIA APARECIDA DA

Anais da Academia Brasileira de Ciências

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2024, Volume 96 N. 3 elocation e20230753

Abstract: En | Text: En | PDF: En

Abstract The larynx is in the lower respiratory tract and has the function of protecting the airways, controlling, and modulating breathing, assisting the circulatory system, and vocalizing. This study aims to describe the anatomy and histology of the skeleton of the larynx and trachea of the species Chelonia mydas, Caiman yacare and Caiman latirostris. The study was conducted at the Federal University of Espírito Santo (UFES), using nine specimens of Ch. mydas, 20 of Ca. yacare and four of Ca. latirostris. Samples of the larynx and trachea were collected, fixed, and sent for dissection of the structures and subsequent macroscopic analysis. For histology, samples were processed by the routine paraffin embedding method and stained with hematoxylin-eosin and Verhoeff. For the three species, two arytenoid cartilages, a cricoid cartilage, a hyoid apparatus composed of a base and two horns were found. In Ch. mydas, two structures called thyroid wings were observed, not found in crocodilians. The trachea of crocodilians presented incomplete tracheal rings and musculature, while the trachea of Ch. mydas presented complete tracheal rings. Histologically, the entire cartilaginous skeleton of the larynx of the three species, as well as the tracheal rings, are constituted by hyaline cartilage. airways controlling breathing system vocalizing latirostris UFES, UFES , (UFES) Ch 2 Ca collected fixed analysis hematoxylineosin hematoxylin eosin Verhoeff cartilages cartilage observed musculature Histologically (UFES

https://doi.org/10.1590/0001-3765202420230753

Nutritional reference values using the DRIS method and sample size for peach palm production
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Conceição, Mariana Passos da

; Rozane, Danilo Eduardo

; Pereira, Eder Florêncio

; Oliveira, Cibelle Tamiris de

; Lima, Juliana Domingues

; Lima Neto, Antonio João de

Revista Brasileira de Ciência do Solo

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2024, Volume 48 elocation e0230076

Abstract: En | Text: En | PDF: En

ABSTRACT One of the challenges in the peach palm production system is the interpretation of leaf analyses and the adaptation of fertilization recommendations. Tools that enhance fertilizer use efficiency are therefore needed. This study aimed to establish norms for evaluating the nutrient status of peach palms using the Diagnosis and Recommendation Integrated System (DRIS) and to determine the adequate number of palm heart samples necessary for a more accurate assessment of productivity. Production, leaf nutrient content, and soil fertility data were collected from 102 commercial stands of peach palm in the Ribeira Valley, state of São Paulo, Brazil, between 2015 and 2020. Adequate number of individual samples (palm hearts) to be collected per stand for productivity assessment was estimated. DRIS norms were established by dividing the database into high-yield (reference population) and low-yield subpopulations, using average productivity as a criterion. By assuming an acceptable error of 5 to 10 % for the assessment of peach palm productivity, taking into account total palm heart weight and/or the weight of cylinders, respectively, 16 plants per stand should be sampled. DRIS was not sensitive enough to diagnose differences in the probability of positive response to fertilization; however, the P, K, Ca, Mg, S, B, Fe, Cu, Mn and Zn contents were positively correlated with the respective nutrient indices. recommendations needed (DRIS Production content Valley Paulo Brazil 201 2020 hearts estimated highyield high yield reference population lowyield low subpopulations criterion 1 andor or cylinders respectively sampled however P K Ca Mg S B Fe Cu indices 20 202 2

https://doi.org/10.36783/18069657rbcs20230076

Stocks of elements in roots in areas of post-pebble mining recovery in the Pará state postpebble post pebble
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Lima, Samila B.

; Castro, Jamilie B. de

; Piscoya, Victor C.

; Pires, Helaine C. G.

; Fernandes, Milton M.

; Araújo Filho, Renisson N. de

Revista Caatinga

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2024, Volume 37 elocation e12193

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT Mining in the municipality of Capitão Poço, Pará, has resulted in soil degradation as the main consequence. Therefore, this study aimed to evaluate the stocks of the elements (N, P, K+, Na+, Ca2+, Mg2+, Fe, Zn, Cu, and Mn) in roots in areas of post-pebble mining recovery in Pará, Brazil. The study was carried out in four areas, namely the area under recovery with soil bioengineering techniques (complementary construction technique and soil stabilization technique), the area under recovery with a natural regeneration process, the degraded area, and the native forest located in the municipality of Capitão Poço-PA. Roots were collected at 0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-80, and 80-100 cm soil layers, quantified the dry biomass and contents of macro and micronutrients, and then, estimated the stocks of elements in roots. The data of the element stocks in roots were subjected to the Shapiro-Wilk normality tests and analysis of variance. Means were compared using the Tukey test at 5% significance using the SISVAR statistical software. The highest average Na+, Ca2+, and Mg2+ values in fine roots were in areas with bioengineering and native forest. The native forest presented the highest average values of macro and micronutrients in fine and thick roots. Furthermore, the lowest stocks of elements in roots were in the degraded area. However, bioengineering techniques are effective in recovering degraded soils, as vegetation cover reestablishes the balance of the soil-plant system. Poço Pará consequence Therefore N, N (N P K K+ Na Na+ Ca2 Ca Ca2+ Mg2 Mg Fe Zn Cu Mn postpebble post pebble Brazil complementary technique, , technique) process PoçoPA. PoçoPA PA. PA Poço-PA 010, 010 0 10, 10 0-10 1020, 1020 20, 20 10-20 2030, 2030 30, 30 20-30 3040, 3040 40, 40 30-40 4050, 4050 50, 50 40-50 5060, 5060 60, 60 50-60 6080, 6080 80, 80 60-80 80100 100 80-10 layers then ShapiroWilk Shapiro Wilk variance 5 software Furthermore However soils soilplant plant system 01 1 0-1 102 2 10-2 203 3 20-3 304 4 30-4 405 40-5 506 6 50-6 608 8 60-8 8010 80-1 0- 10- 20- 30- 40- 50- 60- 801 80-

RESUMO A mineração no município de Capitão Poço, Pará tem acarretado, como principal consequência, a degradação do solo. Desta forma, o objetivo desse estudo foi avaliar os estoques dos elementos N, P, K+, Na+, Ca2+, Mg2+, Fe, Zn, Cu e Mn em raízes sob áreas em recuperação por mineração de seixos no Pará, Brasil. O estudo foi desenvolvido em quatro áreas, sendo elas a área em recuperação com técnicas de bioengenharia de solos (técnica de construção complementares e técnica de estabilização de solo), a área em recuperação com processo de regeneração natural, a área degradada e a floresta nativa, localizadas no município de Capitão Poço. Para análise dos estoques de elementos em raízes, foram coletados raízes nas profundidades 0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-80 e 80-100 cm, depois quantificada a biomassa seca e macros e micronutrientes. Para obtenção dos resultados, os estoques de elementos em raízes foram submetidos aos testes de normalidade Shapiro e Wilk e às análises de variância. A comparação das médias foi realizada pelo teste de Tukey a 5% de significância e utilizado o software estatístico SISVAR. Os maiores valores médios de Na+, Ca2+, Mg2+ em raízes finas foram nas áreas com bioengenharia e floresta nativa. Ademais, a floresta nativa apresentou os maiores valores médios de macro e micronutrientes em raízes finas e grossas. Outrossim, os menores estoques de elementos em raízes foram na area degradada. Contudo, as técnicas de bioengenharia são eficazes para recuperar solos degradados, dado que, a cobertura vegetal reestabelece o equilíbrio do sistema solo-planta. Poço acarretado consequência solo forma N P K K+ Na Na+ Ca2 Ca Ca2+ Mg2 Mg Fe Zn Brasil solo, , solo) natural 010, 010 0 10, 10 0-10 1020, 1020 20, 20 10-20 2030, 2030 30, 30 20-30 3040, 3040 40, 40 30-40 4050, 4050 50, 50 40-50 5060, 5060 60, 60 50-60 6080 80 60-8 80100 100 80-10 cm resultados variância 5 SISVAR Ademais grossas Outrossim Contudo degradados que soloplanta. soloplanta planta. planta solo-planta 01 1 0-1 102 2 10-2 203 3 20-3 304 4 30-4 405 40-5 506 6 50-6 608 8 60- 8010 80-1 0- 10- 20- 30- 40- 50- 801 80-

https://doi.org/10.1590/1983-21252024v3712193rc

10.

CYP2D6 isoenzyme and ABCB1 gene polymorphisms associated with postoperative nausea and vomiting in women undergoing laparoscopic cholecystectomy: a randomized trial CYPD CYP D CYP2D ABCB cholecystectomy
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Ribeiro, Angela Henrique Silva

; Braga, Estêvão Luiz Carvalho

; Ferreira, Nathalia de Araújo Gouveia

; Olej, Beni

; Verçosa, Nubia

; Antunes, Leonardo dos Santos

; Cavalcanti, Ismar Lima

Brazilian Journal of Anesthesiology

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2024, Volume 74 N. 3 elocation 744423

Abstract: En | Text: En | PDF: En

Abstract Introduction: Postoperative nausea and vomiting is still a common complication. Serotonin receptor antagonists are commonly used in clinical practice for antiemetic prophylaxis. Interin-dividual variations in drug response, including single nucleotide polymorphisms, are related to pharmacokinetic and pharmacodynamic changes in these drugs and may lead to a poor therapeutic response. This study aimed to evaluate the influence of CYP2D6 isoenzyme and ABCB1 gene polymorphisms on the frequency of postoperative nausea and vomiting with the use of ondansetron or palonosetron. Methods: A randomized, double-blind clinical trial including 82 women aged 60 years or over undergoing laparoscopic cholecystectomy was conducted. Patients were randomized to receive either ondansetron or palonosetron for postoperative nausea and vomiting prophylaxis. DNA was extracted from saliva. Genetic polymorphisms were analyzed by real-time polymerase chain reaction. The following polymorphisms were analyzed: rs3892097 C/T, rs1128503 A/G, rs16947A/G, rs1065852 A/G, rs1045642 A/G, rs2032582 C/A, and rs20325821 C/A. Results: Overall, vomiting, and severe nausea occurred in 22.5% and 57.5% of patients, respectively. In the palonosetron group, patients with the GG genotype (rs16947 A/G) experienced more severe nausea (p = 0.043). In the ondansetron group, patients with the M genotype (rs16947 A/G) presented mild nausea (p = 0.034), and those with the AA genotype (rs1065852 A/G) experienced more vomiting (p = 0.034). Conclusion: A low antiemetic response was observed with ondansetron in the presence of the AA genotype (rs16947 A/G) and the AA genotype (rs1065852 A/G), and a low therapeutic response was found with palonosetron in the presence of the GG genotype (rs16947 A/G) in laparoscopic cholecystectomy. Register: ClinicalTrials.gov. Introduction complication prophylaxis Interindividual Interin dividual CYPD CYP D CYP2D ABCB Methods doubleblind double blind 8 6 conducted saliva realtime real time reaction rs rs389209 CT C T C/T rs112850 AG G A/G rs16947AG rsAG rs16947A rs16947A/G rs106585 rs104564 rs203258 CA C/A Results Overall 225 22 5 22.5 575 57 57.5 respectively group rs16947 (rs1694 p 0.043. 0043 0.043 . 0 043 0.043) 0.034, 0034 0.034 , 034 0.034) (rs106585 0.034. Conclusion Register ClinicalTrialsgov ClinicalTrials gov ClinicalTrials.gov rs38920 rs11285 rsA rs10658 rs10456 rs20325 2 22. 57. rs1694 (rs169 004 0.04 04 003 0.03 03 (rs10658 rs3892 rs1128 rs1065 rs1045 rs2032 rs169 (rs16 00 0.0 (rs1065 rs389 rs112 rs106 rs104 rs203 rs16 (rs1 0. (rs106 rs38 rs11 rs10 rs20 rs1 (rs (rs10 rs3 rs2

https://doi.org/10.1016/j.bjane.2023.02.002

11.

A Critical Review of Echocardiographic Findings for Diagnosing Cardiac Amyloidosis
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Barberato, Silvio Henrique

; Beck, Adenalva Lima de Souza

; Hotta, Viviane Tiemi

; Rassi, Daniela do Carmo

International Journal of Cardiovascular Sciences

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2024, Volume 37 elocation e20240047

Abstract: En | Text: En | PDF: En

Abstract This article provides a critical review of the diagnostic value of several echocardiographic findings in cardiac amyloidosis (CA). The importance of early and accurate detection of CA is emphasized, considering its challenging diagnosis and the need for a high index of suspicion by clinicians. Echocardiography is often the first choice for imaging assessment of cardiac structure and function when CA is suspected. The article encompasses several conventional echocardiographic features and speckle-tracking echocardiography-derived deformation parameters. Some of these indexes are grouped together to form scores, which can improve the accuracy of diagnosing CA. However, particularly in earlier stages, echocardiography has low specificity to distinguish amyloid from other hypertrophic phenotypes, highlighting the need for correlation with clinical red flags, laboratory tests, and additional cardiac imaging modalities. . (CA) emphasized clinicians suspected speckletracking speckle tracking echocardiographyderived derived parameters scores However stages phenotypes flags tests modalities (CA

https://doi.org/10.36660/ijcs.20240047

12.

Formation of guava seedlings under irrigation with water of different cationic natures and salicylic acid
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Queiroga, Claudiene M. de

; Lima, Geovani S. de

; Torres, Rafaela A. F.

; Paiva, Francisco J. da S.

; Soares, Lauriane A. dos A.

; Gheyi, Hans R.

Revista Caatinga

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sep 2023, Volume 36 N. 3 Pages 650 - 662

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT The objective of this study was to evaluate gas exchange, biomass, and quality of guava seedlings as a function of the cationic nature of the water used in irrigation and foliar application of salicylic acid. The experiment was carried out in a greenhouse in Pombal, PB, Brazil, using a randomized block design, in a 6 × 4 factorial scheme with six cationic compositions of irrigation water [S1 - Control (supply water); S2 - Na+; S3 - Ca2+; S4 - Na++Ca2+; S5 - Mg2+, and S6 - Na++Ca2++Mg2+], associated with four concentrations of salicylic acid (0, 1.3, 2.6, and 3.9 mM), with 3 replicates. Plants in control (S1) were irrigated with water of electrical conductivity (ECw) of 0.3 dS m-1, while in the other treatments were irrigated with different types of water and had an ECw of 4.3 dS m-1, consisting of different cations, in the form of chloride. In the seedling formation phase, guava plants were sensitive to calcic water, which resulted in a marked decrease in their growth. Stomatal conductance, transpiration, and biomass accumulation of guava seedlings were more affected by variation in electrical conductivity than by cationic nature of the water. Salicylic acid at concentrations of 2.9 and 1.9 mM increased stomatal conductance and stem dry biomass, respectively, of guava seedlings. Water with ECw of 4.3 dS m-1 allowed the formation of guava seedlings with acceptable quality for transplanting to the field, regardless of the cationic nature of the water. exchange Pombal PB Brazil design S1 S [S supply water) Na+ Na Ca2+ Ca2 Ca Na++Ca2+ NaCa2 NaCa Mg2 Mg Mg2+ Na++Ca2++Mg2+, NaCa2Mg2 NaCaMg Na++Ca2++Mg2+ , Na++Ca2++Mg2+] 0, 0 (0 13 1 1.3 26 2 2.6 39 9 3. mM, mM) replicates (S1 (ECw 03 0. m1, m1 m 1, 43 4. cations chloride phase growth transpiration 29 2. 19 1. respectively m- field Na++Ca2 NaCa2Mg Na++Ca2++Mg2 ( (S Na++Ca Na++Ca2++Mg

RESUMO Objetivou-se com este trabalho avaliar as trocas gasosas, as fitomassas e a qualidade das mudas de goiabeira em função da natureza catiônica da água utilizada na irrigação e aplicação foliar de ácido salicílico. O experimento foi conduzido em casa-de-vegetação, Pombal, PB, utilizando-se o delineamento de blocos casualizados, em esquema fatorial 6 × 4, sendo seis composições catiônicas da água de irrigação [S1 - Testemunha (água de abastecimento); S2 - Na+; S3 - Ca2+; S4 - Na++Ca2+; S5 - Mg2+ e S6 - Na++Ca2++Mg2+], associados a quatro concentrações de ácido salicílico (0; 1,3; 2,6 e 3,9 mM), com 3 repetições. As plantas referentes à testemunha (S1) foram irrigadas com água de condutividade elétrica (CEa) de 0,3 dS m-1, enquanto outros tratamentos diferentes tipos de águas foi utilizada com CEa de 4,3 dS m-1, constituída de diferentes cátions, em forma de cloreto. Na fase de formação de mudas, a goiabeira foi sensível à água de natureza cálcica, obtendo-se diminuição acentuada no crescimento das plantas. A condutância estomática, a transpiração e o acúmulo de fitomassas das mudas de goiabeira foram mais afetados pela variação na condutividade elétrica em comparação com a natureza catiônica da água. Ácido salicílico nas concentrações de 2,9 e 1,9 mM aumentou a condutância estomática e a fitomassa seca do caule, respectivamente, em mudas de goiabeira. A água com CEa de 4,3 dS m-1 permitiu a formação de mudas de goiabeira com qualidade aceitável para o transplantio no campo, independente da natureza catiônica da água. Objetivouse Objetivou se gasosas casadevegetação, casadevegetação casa vegetação, vegetação casa-de-vegetação Pombal PB utilizandose utilizando casualizados 4 S1 S [S abastecimento abastecimento) Na+ Ca2+ Ca2 Ca Na++Ca2+ NaCa2 NaCa Mg2 Mg Na++Ca2++Mg2+, NaCa2Mg2 NaCaMg Na++Ca2++Mg2+ , Na++Ca2++Mg2+] 0 (0 1,3 13 1 26 2 2, 39 9 3, mM, mM) repetições (S1 (CEa 03 0, m1, m1 m 1, 43 cátions cloreto cálcica obtendose obtendo 29 19 caule respectivamente m- campo Na++Ca2 NaCa2Mg Na++Ca2++Mg2 ( (S Na++Ca Na++Ca2++Mg

https://doi.org/10.1590/1983-21252023v36n318rc

13.

Deficiencies of nitrogen, calcium, and micronutrients are the most limiting factors for growth and yield of smell pepper plants nitrogen calcium
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Magalhães, Deila da Silva

; Viegas, Ismael de Jesus Matos

; Barata, Henrique da Silva

; Costa, Milton Garcia

; Silva, Bianca Cavalcante da

; Mera, Willian Yuki Watanabe de Lima

Revista Ceres

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jun 2023, Volume 70 N. 3 Pages 125 - 135

Abstract: En | Text: En | PDF: En

ABSTRACT Cultivation and commercialization of Capsicum pepper have great importance in Brazil. This work assessed the influence of omission of macro and micronutrients on the growth and mineral nutrition of sweet pepper plants (Capsicum chinense Jacquin). The research was carried out in a greenhouse with washed sand as substrate. The experimental design was completely randomized with five replications and eight treatments: complete (control), omission of N, P, K, Ca, Mg, S, and micronutrients (B, Cu, Fe, Mn and Zn). The plants were submitted to the treatments when they reached an average height of 20 cm and the nutrient solution was supplied by percolation in plastic pots and renewed every 15 days. Nutrients omission affected negatively plant growth as a whole. The omission of N, Ca, and micronutrients greatly reduced sweet pepper yield. The C. chinense plants presented the sequence by dry matter production of shoots and roots in descending order: COMP > OP > OS > OK > Omg > ON > Oca > OMicro. Brazil Jacquin. Jacquin . Jacquin) substrate control, control , (control) N P K Ca Mg S B, B (B Cu Fe Zn. Zn Zn) 2 1 days whole yield C order OMicro (control

https://doi.org/10.1590/0034-737x202370030013

14.

Stocks of elements in radicular biomasses in different coverages in the cerrado of tocantins, Brazil tocantins
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Lima, Dayane de S.

; Piscoya, Victor C.

; Cunha Filho, Moacyr

; Fernandes, Milton M.

; Gomes Filho, Raimundo R.

; Araújo Filho, Renisson N. de

Revista Caatinga

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mar 2023, Volume 36 N. 1 Pages 124 - 134

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT Root biomass plays a vital role in nutrient cycling for the maintenance and functioning of different ecosystems. In this context, this study aimed to determine the stocks of elements in root biomass under different covers in the Cerrado of Tocantins, Brazil. The research was conducted in different vegetal coverings: agriculture, pasture, Eucalyptus sp., and native Cerrado forest. Root biomass was collected in six trenches, 70 x 70 cm, and a depth of 50 cm through sieving. Macro and microelement stocks were determined in root biomass. Macros and microelements showed higher average values for the native forest. With the change in vegetation cover, N, P, and S were higher in agriculture, with stocks of 1.82 Mg ha-1, 1.83 Mg ha-1, and 9.6 Mg ha-1. In a planted forest of Eucalyptus sp., macroelements K, Ca, and Mg were higher, with stock values of 16.06 Mg ha-1, 25.91 Mg ha-1, and 5.02 Mg ha-1, and microelements, B, Cu, Fe, Mn, and Zn with values of 0.05 Mg ha-1, 0.04 Mg ha-1, 5 Mg ha-1, 0.7 Mg ha-1, and 0.08 Mg ha-1 in root biomass, respectively. Thus, the planted forest of Eucalyptus sp. promoted greater stocks and cycling of elements, with greater stability of the organic material. ecosystems context Tocantins Brazil coverings agriculture pasture sp trenches 7 sieving cover N P 182 1 82 1.8 ha1, ha1 ha 1, 183 83 96 9 6 9. ha1. 1. K Ca 1606 16 06 16.0 2591 25 91 25.9 502 02 5.0 B Cu Fe Mn 005 0 05 0.0 004 04 07 0. 008 08 ha- respectively Thus material 18 8 160 16. 259 2 25. 5. 00

RESUMO As biomassas radiculares desempenham um papel importante na ciclagem de nutrientes, para manutenção e funcionamento dos diferentes ecossistemas. Diante desse contexto, o trabalho teve como objetivo determinar os estoques de elementos em biomassa radiculares sob diferentes coberturas no Cerrado em Tocantins, Brasil. A pesquisa foi conduzida em diferentes coberturas vegetais: agricultura, pastagem, Eucalyptus sp. e floresta nativa de cerrado. As biomassas radiculares foram coletadas em seis trincheiras com dimensões 70 x 70 cm, e profundidade de 50 cm através do peneiramento. Os estoques dos macros e microelementos foram determinados em biomassas radiculares. Os macros e microelementos apresentaram valores médios maiores para floresta nativa. Com a mudança de cobertura vegetal N, P, S, foram maiores em agricultura, com estoques de 1,82 Mg ha-1, 1,83 Mg ha-1 e 9,6 Mg ha-1. Em floresta plantada de Eucalyptus sp., os macroelementos K, Ca e Mg foram maiores tendo valores de estoques respectivamente de 16,06 Mg ha-1, 25,91 Mg ha-1 e 5,02 Mg ha-1 e microelementos B, Cu, Fe, Mn e Zn com valores de 0,05 Mg ha-1, 0,04 Mg ha-1, 5 Mg ha-1, 0,7 Mg ha-1 e 0,08 Mg ha-1 em biomassas radiculares. Deste modo a floresta plantada de Eucalyptus sp. promoveu maiores estoques e ciclagem de elementos, com maior estabilidade do material orgânico. nutrientes ecossistemas contexto Tocantins Brasil vegetais agricultura pastagem sp cerrado 7 peneiramento N P S 182 1 82 1,8 ha1, ha1 ha 1, 183 83 ha- 96 9 6 9, ha1. 1. K 1606 16 06 16,0 2591 25 91 25,9 502 02 5,0 B Cu Fe 005 0 05 0,0 004 04 07 0, 008 08 orgânico 18 8 160 16, 259 2 25, 5, 00

https://doi.org/10.1590/1983-21252023v36n114rc

15.

Apparent calcium retention and digestibility coefficients of limestone with different particle sizes in laying hens
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Diana, Thiago Ferreira

; Calderano, Arele Arlindo

; Rostagno, Horácio Santiago

; Marques, Maria Rita de Lima

; Tavernari, Fernando de Castro

; Veroneze, Renata

; Albino, Luiz Fernando Teixeira

Scientia Agricola

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2023, Volume 80 elocation e20210258

Abstract: En | Text: En | PDF: En

ABSTRACT Apparent calcium (Ca) retention and digestibility coefficients are affected by limestone particle size in the diet of laying hens. This study aimed to determine the apparent retention and digestibility coefficients of Ca in limestone of different particle sizes in laying hens. The study comprised 288 Lohmann Brown laying hens (50 weeks of age; 1,964 ± 98 g) distributed in a completely randomized experimental design with a 3 × 2 factorial arrangement [three Ca concentrations (10, 20, and 30 g kg–1) × two limestone particle sizes (480 and 1,978 µm)] with eight repetitions per treatment and six birds per experimental unit. The experiment included five days for adaptation and five days for total excreta collection. All birds were slaughtered at the end of the ten days to collect the ileal contents. The total or ileal Ca content was plotted against the Ca of diets concentration using linear regression analysis. The regression line slope represented the apparent retention (CaR) and digestibility coefficients of Ca (CaD) in limestone. There was interaction between Ca concentration in the diet and limestone granulometry on CaD (p = 0.001) and CaR (p < 0.001). The CaD and CaR of fine- and coarse-grained limestone increased linearly with increasing Ca concentrations in the diet. The apparent digestibility coefficients estimated for laying hens fed with fine-grained and coarse-grained limestone were 0.72 and 0.35, respectively. The apparent retention coefficients estimated for laying hens fed fine-grained and coarse-grained limestone were 0.96 and 0.47, respectively.

https://doi.org/10.1590/1678-992x-2021-0258

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sponsor	sponsor
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volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

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