RESUMO: O estudo foi conduzido com o objetivo de avaliar o cromo e restrições alimentares quantitativa e qualitativa como estratégias nutricionais alternativas a ractopamina para suínos machos castrados em terminação. Foram utilizados 50 suínos machos castrados, geneticamente similares, com peso inicial de 99,0 ± 4,3 kg e final de 117,2 ± 5,8 kg. Os animais foram distribuídos em delineamento experimental de blocos ao acaso em cinco tratamentos nutricionais (Controle; Rac = 10ppm de ractopamina; Cromo = 0,8mg de cromo levedura; Qualit = restrição qualitativa com menos 7,5% de energia líquida na dieta e Quanti = redução quantitativa de 15% no fornecimento de ração), com cinco repetições e dois animais por repetição. A suplementação de cromo e a restrição alimentar quantitativa reduziram (P < 0,05) os consumos de ração, lisina digestível, energia líquida e proteína bruta. O cromo, a ractopamina e a restrição quantitativa melhoraram (P < 0,05) a conversão alimentar. A suplementação de cromo, ractopamina e as restrições alimentares não influenciam (P < 0,05) as características de carcaça dos suínos. A restrição alimentar quantitativa e a suplementação de 0,8 mg de cromo levedura se apresentam como potenciais alternativas para a substituição da ractopamina nas dietas. RESUMO terminação 5 similares 990 99 0 99, 43 4 3 4, 1172 117 2 117, 58 8 5, Controle (Controle ppm 08mg 8mg 75 7 7,5 15 ração , ração) repetição P 0,05 005 05 digestível bruta 08 0, dietas 9 11 7, 1 0,0 00

ABSTRACT: This study evaluated chromium and quantitative and qualitative feed restriction as alternative nutritional strategies to ractopamine in finishing barrows. Fifty barrows, genetically similar, with an initial body weight of 99.0 ± 4.3 kg and a final body weight of 117.2 ± 5.8 kg were used. The animals were distributed in a randomized complete block design with five nutritional treatments (Control; Rac = 10ppm ractopamine; Chromium = 0,8mg chromium yeast; Quality = qualitative restriction, 7.5% less net energy in the diet; Quanti = 15% quantitative reduction in feed supply), with five replicates and two animals per replicate. Chromium supplementation and quantitative feed restriction reduced feed, lysine, net energy, and crude protein intakes (P < 0.05). Chromium, ractopamine, and quantitative restriction improved feed conversion (P < 0.05). Supplementation with chromium and ractopamine and feed restriction did not influence the carcass characteristics of the pigs (P < 0.05). Quantitative feed restriction and supplementation of 0.8mg of chromium yeast are presented as potential alternatives to ractopamine in the diet of finishing pigs. ABSTRACT barrows similar 990 99 0 99. 43 4 3 4. 1172 117 2 117. 58 5 8 5. used Control (Control ppm 08mg mg 8mg 75 7 7.5 15 supply, supply , supply) replicate lysine P 0.05. 005 0.05 . 05 0.05) 9 11 7. 1 00 0.0 0.

ABSTRACT. This study aimed to evaluate the effect of the position of bait nests on the capture of stingless bee species. The experiment was conducted in the rural area of the municipality of Campo Grande, state of Mato Grosso do Sul, from May 2022 to September 2022. Thirty bait nests were distributed in a randomized block design, with two treatments (A: bait nests set up one meter above the ground, and B: bait nests buried in the ground), with 15 replications per treatment. Of treatment B, two baits were nested by jataí (Tetragonisca angustula), and two were nested by Mandaguari-preta (Scaptotrigona postica). Therefore, the position of the bait nest influenced (p < 0.05) the success in capturing stingless bee species, in which treatment B, with baits buried in the ground, was significantly superior to treatment A, with baits set up one meter above the ground. ABSTRACT species Grande Sul 202 design A (A ground B , ground) 1 Tetragonisca angustula, angustula angustula) Mandaguaripreta Mandaguari preta Scaptotrigona postica. postica . postica) Therefore p 0.05 005 0 05 20 0.0 00 2 0.

Abstract The aim of this study was to characterize the production and anaerobic digestion of manure from finishing pigs subjected to feed restriction or supplemented with ractopamine or chromium (Cr). The waste came from 50 barrows in the finishing phase, aged ± 154 days, with a starting weight of 99.0 ± 4.4 kg and a final weight of 117.2 ± 5.8 kg. The experimental diets were as follows: control (conventional diet), qualitative restriction (7.5% reduction in net energy compared to the control diet), quantitative restriction (15% reduction in feed supply), Cr (0.8 mg), and ractopamine (10 ppm). The data were subjected to an analysis of variance using a randomized block design, in which the weeks of analysis were considered blocks (cofactors). There were no differences in manure production between the diets regarding natural matter (NM), dry matter (DM), mineral matter (MM), or organic matter (OM). Animals fed the control diet had the highest residue coefficient, and there was no difference among the other diets. No differences were observed among the diets regarding total solids, pH, or total nitrogen in the tributaries or effluents. The highest biogas yield (574 mL g-1) of added volatile solids (VS) was obtained in the digesters supplied with manure from animals fed a qualitatively restricted diet. It can be concluded that a qualitatively restricted diet results in higher manure production but with lower nitrogen and phosphorus excretion and higher biogas yields. Cr. . (Cr) 5 phase 15 days 990 99 0 99. 44 4 4. 1172 117 2 117. 58 8 5. follows conventional diet, , diet) 7.5% 75 7 (7.5 15% (15 supply, supply supply) 0.8 08 (0. mg, mg mg) 10 (1 ppm. ppm ppm) design cofactors. cofactors (cofactors) NM, NM (NM) DM, DM (DM) MM, MM (MM) OM. OM (OM) coefficient pH effluents 574 (57 g1 g 1 g-1 VS (VS yields (Cr 9 11 7.5 (7. 0. (0 ( (cofactors (NM (DM (MM (OM 57 (5 g- 7. (7

Resumo Realizou-se este estudo com o objetivo de caracterizar a produção e a digestão anaeróbia de dejetos de suínos em terminação submetidos a restrição alimentar ou suplementados com ractopamina ou cromo. Os dejetos foram provenientes de 50 suínos machos castrados, em fase de terminação, com ± 154 dias de idade, com peso inicial de 99,0 ± 4,4 kg e final de 117,2 ± 5,8 kg. As dietas experimentais foram: controle (dieta convencional); restrição qualitativa (redução de 7,5% de energia líquida em relação à dieta controle); restrição quantitativa (redução de 15% no fornecimento de ração); cromo (0,8 mg); e ractopamina (10 ppm). Os dados foram submetidos à análise de variância por meio do delineamento em blocos ao acaso, no qual as semanas de análises foram consideradas como blocos (cofator). Não foram observadas diferenças entre as dietas nas produções de dejetos na matéria natural (MN), matéria seca (MS), matéria mineral (MM) e matéria orgânica (MO). Animais que receberam a dieta controle apresentaram o maior coeficiente de resíduo e não houve diferença entre as demais dietas. Não foram observadas diferenças entre as dietas para sólidos totais, pH e nitrogênio total dos afluentes e efluentes. O maior rendimento de biogás (574 mL g-1 de SV adicionados) foi obtido com os digestores abastecidos com dejetos de animais alimentados com dieta qualitativamente restrita. Conclui-se que a dieta com restrição qualitativa resulta em maior produção de dejetos, porém com menores excreções de nitrogênio e fósforo e maior rendimento de biogás. Realizouse Realizou se 5 castrados 15 idade 990 99 0 99, 44 4 4, 1172 117 2 117, 58 8 5, convencional convencional) redução 75 7 7,5 controle) ração ração) 0,8 08 (0, mg mg) 10 (1 ppm. ppm . ppm) acaso cofator. cofator (cofator) MN, MN , (MN) MS, MS (MS) MM (MM MO. MO (MO) totais efluentes 574 (57 g1 g 1 g- adicionados restrita Concluise Conclui 9 11 7, 0, (0 ( (cofator (MN (MS (MO 57 (5

Abstract The objective of this study was to evaluate the nutritional functionality of the xylanolytic complex produced from Aspergillus japonicus var. aculeatus UFMS 48.136 isolated from the Cerrado/ Pantanal biome in Mato Grosso do Sul, compared to commercial xylanase, in swine diets. Sixteen barrows were used, with an initial weight of 64.23 ± 10.5 kg, distributed in a randomized block experimental design, with four diets: control, formulated according to nutritional recommendations; negative control, formulated with a reduction of 100 Kcal / kg of metabolizable energy (ME); negative control + xylanase Cerrado / Pantanal; negative control + commercial xylanase; with four repetitions each. The xylanase supplementation provided higher (P<0.05) values of digestible energy (DE), ME, and higher (P<0.05) digestibility of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF), and acid detergent fiber (ADF) in relation to the negative control diet, but without differing (P>0.05) from the control diet. The inclusion of xylanases increased (P<0.05) in the coefficients of digestibility (CD) and metabolism of crude energy (CE), DM, OM, CP, EE, NDF, and ADF. There was no difference (P>0.05) in digestibility and CD values between Cerrado/Pantanal and commercial xylanase. The inclusion of xylanases made it possible to reduce 100 Kcal of ME per kilogram of diet. Cerrado/Pantanal xylanases therefore have the same nutritional efficiency as commercial xylanases. var 48136 48 136 48.13 Sul diets used 6423 64 23 64.2 105 10 5 10. design recommendations (ME) each P<0.05 P005 P 0 05 (P<0.05 DE, DE , (DE) DM (DM) OM (OM) CP (CP) EE (EE) NDF (NDF) ADF (ADF diet P>0.05 (P>0.05 (CD CE, CE (CE) CerradoPantanal 4813 4 13 48.1 642 6 2 64. 1 (ME P<0.0 P00 (P<0.0 (DE (DM (OM (CP (EE (NDF P>0.0 (P>0.0 (CE 481 48. P<0. P0 (P<0. P>0. (P>0. P<0 (P<0 P>0 (P>0 P< (P< P> (P> (P

Resumo Realizou-se este estudo com o objetivo de avaliar a funcionalidade nutricional do complexo xilanolítico produzido a partir de fungos da linhagem Aspergillus japonicus var. aculeatus UFMS 48.136, oriundo do bioma Cerrado/Pantanal sul mato-grossense em comparação à xilanase comercial, em dietas de suínos. Foram utilizados dezesseis suínos machos, com peso inicial de 64,23 ± 10,5 kg, distribuídos em delineamento experimental de blocos ao acaso, com quatro dietas: controle, formulado de acordo com as recomendações nutricionais; controle negativo, formulado com redução de 100 Kcal / kg de energia metabolizável (EM); controle negativo + xilanase Cerrado / Pantanal; controle negativo + xilanase comercial; com quatro repetições cada. A suplementação das xilanases proporcionou maiores (P<0,05) valores de energia digestível (ED), metabolizável (EM) e maiores (P<0,05) digestibilidade da matéria seca (MS), matéria orgânica (MO), proteína bruta (PB), extrato etéreo (EE), fibra em detergente neutro (FDN) e fibra em detergente ácido (FDA) em relação à dieta controle negativo, mas sem diferir (P>0,05) da dieta controle. A inclusão das xilanases proporcionou aumento (P<0,05) nos coeficientes de digestibilidade (CD) e metabolizabilidade da energia bruta (EB), MS, MO, PB, EE, FDN e FDA. Não foi constatada diferença (P>0,05) nos valores de digestibilidade e de CD entre as xilanase Cerrado/Pantanal e Comercial. A inclusão das xilanases possibilita a redução de 100 Kcal de EM por kg da dieta. A xilanase Cerrado / Pantanal possui a mesma eficiência nutricional em comparação com a xilanase comercial. Realizouse Realizou se var 48136 48 136 48.136 CerradoPantanal matogrossense mato grossense comercial machos 6423 64 23 64,2 105 10 5 10, acaso nutricionais cada P<0,05 P005 P 0 05 (P<0,05 ED, ED , (ED) (EM MS (MS) MO (MO) PB (PB) EE (EE) (FDN FDA (FDA P>0,05 (P>0,05 (CD EB, EB (EB) Comercial 4813 4 13 48.13 642 6 2 64, 1 P<0,0 P00 (P<0,0 (ED (MS (MO (PB (EE P>0,0 (P>0,0 (EB 481 48.1 P<0, P0 (P<0, P>0, (P>0, 48. P<0 (P<0 P>0 (P>0 P< (P< P> (P> (P

Abstract The chemical and nutritional characteristics of the four distillers dried grains with solubles (DDGS) were determined for dry matter (DM), mineral matter (MM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF) and gross energy analyzed (GEa), from which the values of gross energy (GE), digestible energy (DE), metabolizable energy (ME) and net energy (NE) were estimated. There were differences in the contents of EE, NDF, GEa, GE, DE, ME and NE between the lots. A total of 40 barrows with an initial weight of 72.69 ± 5.66 kg were assigned to a randomized block design, fed diets containing 0, 100, 200 and 300 g kg−1 DDGS for 28 days and were subjected to performance assessment. The inclusion of DDGS in the diets did not affect daily feed intake (DFI), daily weight gain (DWG) or feed conversion (FC) but linearly reduced the final weight. Based on the results of the performance and prices of ingredients in the local market, we calculated the costs of feed, revenue and gross operating profit (GOP). Inclusions of DDGS in pig diets reduced costs and revenues but did not affect GOP. DDGS presented chemical and nutritional variation between the lots. Levels of inclusion up to 300 g kg−1 DDGS do not affect finishing pig performance and profitability. (DDGS DM, DM , (DM) MM, MM (MM) CP, CP (CP) EE (EE) NDF (NDF GEa (GEa) GE (GE) DE (DE) (ME (NE estimated lots 4 7269 72 69 72.6 566 5 66 5.6 design 0 100 20 30 kg1 1 kg− 2 assessment DFI, DFI (DFI) DWG (DWG FC (FC market GOP . (GOP) profitability (DM (MM (CP (EE (GEa (GE (DE 726 7 6 72. 56 5. 10 3 (DFI (GOP

Resumo As características químicas e nutricionais de quatro grãos secos destilados com solúveis (DDGS) foram determinados quanto a matéria seca (MS), matéria mineral (MM), proteína bruta (PB), extrato etéreo (EE), fibra em detergente neutro (FDN) e energia bruta analisada (EBa) dos quais os valores de energia bruta (EB), digestível (ED), metabolizável (EM) e liquida (EL) foram estimados. Houve diferenças no conteúdo de EE, FDN, EBa, EB, ED, EM e EL entre lotes. Um total de 40 machos castrados 72.69 ± 5.66 kg foram distribuídos em blocos ao caso, alimentados com dietas com 0, 100, 200 e 300 g kg−1 DDGS por 28 dias. A inclusão de DDGS não afetou consumo de ração diário, ganho de peso diário e conversão alimentar mas reduziu de forma linear o peso final. Baseados nos resultados de desempenho, preços de ingredientes e mercado local foram calculados os custos de ração, receita e lucro operacional bruto (LOB). Inclusões de DDGS em dietas para suínos reduziu custos e receitas mas não afetou LOB. DDGS apresentam variação química e nutricional entre lotes. Níveis de até 300 g kg−1 de DDGS não afetam desempenho e lucratividade com suínos em terminação. (DDGS MS, MS , (MS) MM, MM (MM) PB, PB (PB) EE (EE) FDN (FDN EBa (EBa EB (EB) ED (ED) (EM (EL estimados lotes 4 7269 72 69 72.6 566 5 66 5.6 caso 0 100 20 30 kg1 1 kg− 2 dias final LOB . (LOB) terminação (MS (MM (PB (EE (EB (ED 726 7 6 72. 56 5. 10 3 (LOB

RESUMO: O objetivo deste estudo foi avaliar a estabilidade no processo de digestão anaeróbia e a produção de biogás dos dejetos de poedeiras alimentadas com dietas contendo diferentes fontes de minerais e níveis de óleo de alecrim. Os dejetos foram provenientes de 288 poedeiras semipesadas, com 30 semanas de idade, colhidos por 112 dias. Utilizou-se o delineamento inteiramente casualizado com esquema fatorial 2x3, com medidas repetidas no tempo, sendo as dietas com duas fontes minerais (inorgânica e orgânica) e três níveis de óleo de alecrim (0, 100 e 200 mg kg-1). Foram utilizados 12 biodigestores contínuos (7,5 kg), operados com tempo de retenção hidráulica de 30 dias, com cargas diárias com 5% de sólidos totais, por 90 dias. Foram realizadas análises semanais do afluente e efluente mensurando-se os valores de sólidos totais (ST), sólidos voláteis (SV), pH, nitrogênio amoniacal (N amoniacal), alcalinidade parcial (AP), alcalinidade intermediária (AI) e a relação AP:AI; quinzenalmente análises das concentrações de nitrogênio total (N) e de fósforo total (P) e diariamente mensuradas as produções de biogás para calcular o potencial de produção de biogás do dejeto. Dejetos de poedeiras alimentadas com minerais orgânicos apresentam maior potencial de produção de biogás, maiores reduções de ST e SV em relação àquelas alimentadas com minerais inorgânicos. A adição de óleo de alecrim na dieta de poedeiras não oferece riscos de falência para o processo de digestão anaeróbia. RESUMO 28 semipesadas 3 idade 11 dias Utilizouse Utilizou se 2x3 x inorgânica orgânica 0, 0 (0 10 20 kg1. kg1 kg 1 . kg-1) 7,5 75 7 5 (7, kg, , kg) 9 mensurandose mensurando ST, (ST) SV, (SV) pH N amoniacal, amoniacal) AP, AP (AP) AI (AI APAI AP:AI P (P dejeto inorgânicos 2 2x ( kg-1 7, (7 (ST (SV (AP kg-

ABSTRACT: This study evaluated the stability of anaerobic digestion and biogas production from the manure of laying hens fed diets containing different mineral sources and rosemary oil concentrations. Manure was obtained from 288 semi-heavy laying hens, 30 weeks old, and collected for 112 days. A completely randomized design was used in a 2×3 factorial scheme with repeated measures, considering two mineral sources (inorganic and organic) and three concentrations of rosemary oil (0, 100, and 200 mg kg-1). Twelve continuous bench digesters (7.5 kg) were operated with a hydraulic retention time of 30 days and daily loads of 5% total solids, for 90 days. A weekly analysis of influents and effluents was performed by measuring the values of total solids (TS), volatile solids (VS), pH, ammonia nitrogen (ammonia N), intermediary alkalinity (IA), partial alkalinity (PA), and the relationship IA:PA; biweekly analysis of total nitrogen (N) and total phosphorus (P) concentrations; and daily measurement of biogas production data to calculate the biogas production potential of the manure. Manure from laying hens fed with organic minerals has greater potential for biogas production and greater TS and VS reduction than manure from hens supplemented with inorganic minerals. Laying hen diets containing up to 200 mg kg-1 of rosemary oil do not present the risk of anaerobic digestion failure. ABSTRACT 28 semiheavy semi heavy 3 old 11 23 2 2× measures 0, 0 (0 100 20 kg1. kg1 kg 1 . kg-1) 7.5 75 7 5 (7. 9 TS, , (TS) VS, (VS) pH N, N N) IA, IA (IA) PA, PA (PA) IAPA IA:PA (N P (P kg- failure ( 10 7. (7 (TS (VS (IA (PA

Abstract This study aimed to evaluate the effects of mineral sources and rosemary oil levels in the diet of commercial layers on the qualitative and quantitative characteristics of the waste generated. Manure was obtained from 288 commercial laying hens of the HyLine Brown lineage (semi-heavy layers) at 30 weeks of age over a period of 112 d (four cycles of 28 d). A completely randomized design was used with a 2×3 factorial scheme with repeated measures over time (16 repetitions), with two mineral sources (inorganic and organic) and three levels of rosemary oil (0, 100, and 200 mg kg-1). The waste was collected weekly, weighed, and the calculations of waste production, residue coefficient (RC) were performed. Also analyses of total solids (TS), volatile solids (VS), pH, macro-, and micro-minerals were performed. Mineral sources affect the quality characteristics of the manure. The amount of rosemary oil affected the quantitative and qualitative characteristics of the waste generated. It was concluded that diets containing organic minerals resulted in waste with less polluting power, as it had a lower TS, pH, total N, and total P values. Rosemary oil increased manure production in natural matter (NM) and increased the TS and VS values in the manure layer, causing a greater environmental impact. generated semiheavy semi heavy 3 11 four 2 d. . d) 23 2× 16 (1 repetitions, repetitions , repetitions) inorganic 0, 0 (0 100 20 kg1. kg1 kg 1 kg-1) weekly weighed RC (RC performed (TS) VS, (VS) pH macro, macro macro- microminerals micro power N NM (NM layer impact ( 10 kg-1 (TS (VS kg-

Resumo Realizou-se este estudo com o objetivo de avaliar fontes de minerais e de níveis do óleo de alecrim na dieta de poedeiras comerciais sobre as características qualitativas e quantitativas dos dejetos gerados. Os dejetos foram provenientes de 288 poedeiras comerciais da linhagem HyLine Brown (poedeiras semipesadas) com 30 semanas de idade, durante o período de 112 dias (4 ciclos de 28 dias). Foi utilizado delineamento inteiramente casualizado com esquema fatorial 2x3 com medidas repetidas no tempo (16 repetições), sendo duas fontes minerais (inorgânica e orgânica) e três níveis de óleo de alecrim (0, 100 e 200 mg kg-1). Semanalmente os dejetos foram coletados, pesados e realizados os cálculos de produção de dejetos, coeficiente de resíduo (Cr) e as análises de sólidos totais (ST), sólidos voláteis (SV), pH, macro e microminerais. As fontes de minerais afetaram as características qualitativas dos dejetos. Os níveis de óleo de alecrim afetaram as características quantitativas e qualitativas do dejeto gerado. Concluiu-se que dietas contendo mineral orgânico resultam em dejetos com menor poder poluente por apresentar menores valores de ST, pH, N total e P total. O óleo de alecrim aumenta a produção de dejetos na MN e aumenta os valores de ST e SV nos dejetos das poedeiras causando maior impacto ambiental. Realizouse Realizou se gerados semipesadas 3 idade 11 4 ( 2 dias. . dias) x 2x 16 (1 repetições, repetições , repetições) inorgânica orgânica 0, 0 (0 10 20 kg1. kg1 kg 1 kg-1) coletados Cr (Cr (ST) SV, (SV) pH microminerais gerado Concluiuse Concluiu ambiental kg-1 (ST (SV kg-

Abstract This study was conducted to examine the effects of a diet formulated with industrial amino acids and a commercial vitamin-mineral mixture on the characteristics of carcass and meat cuts of slow-growing broilers slaughtered at different ages. The experiment involved 600 one-day-old male and female white Naked Neck chicks. The chicks were allotted randomly to a 2 × 3 factorial arrangement consisting of two diets and three slaughter ages, in a completely randomized experimental design with five replicates of 20 birds each. The experimental period was 84 days. Six chicks were selected and slaughtered on the first day, and then at 56, 70 and 84 days of age 10 birds unit was selected and slaughtered per experimental period. Weight and yield of carcass, abdominal fat and breast, thigh and drumstick meat were determined. Additionally, moisture, protein, fat and mineral matter contents and protein and fat deposition in the breast, drumstick and thigh muscles were determined. The diet did not influence the yields of carcass, abdominal fat, or meat cuts or the nutritional composition of meat. Slaughter age influenced the yields of breast and thigh meat and abdominal fat; the protein content of breast meat; and the moisture, crude protein, fat, and mineral matter contents of drumstick and thigh meat. There was an interaction effect between diet and slaughter age for protein deposition in breast meat. The age factor influenced fat deposition in the drumstick muscles. Protein deposition in the thigh muscles was influenced by the diet. Moreover, a difference was observed between the ages for protein and fat deposition in the thigh muscle. In conclusion, the use of a commercial mixture in the diet results in decreased protein deposition in the breast and thigh muscles, although this difference does not affect the characteristics of carcass or meat cuts. Birds slaughtered at 70 days exhibit similar carcass characteristics to those of birds slaughtered at 84 days, indicating the possibility of an earlier slaughter age. vitaminmineral vitamin slowgrowing slow growing 60 onedayold one day old each 8 56 7 1 determined Additionally moisture Moreover muscle conclusion 6 5

RESUMO: A cadeia produtiva de suínos tem concentrado esforços para reduzir a quantidade e melhorar a qualidade da gordura depositada na carcaça. Devido a associação do perfil lipídico com doenças cardiovasculares, pesquisas têm sido desenvolvidas para entender como ocorre a deposição e para melhorar o perfil de ácidos graxos na carcaça. Dentre os fatores que afetam a composição dessa gordura estão a raça, o sexo e a dieta dos suínos, sendo que este último é o de maior impacto. A inclusão de ingredientes lipídicos parece uma promissora forma de modular o perfil lipídico da gordura na carcaça dos suínos, sendo observado efeito nos ácidos graxos saturados, monoinsaturados e poli-insaturados. O efeito é maior naquele ácido graxo de maior concentração na fonte utilizada. O óleo de soja pode dobrar o valor do ácido linoleico. Um subproduto do óleo de oliva incrementa em 4% o ácido oleico. E o óleo de linhaça tem a capacidade de aumentar o α-linolênico de menos de 1% para mais de 18% no total de ácidos graxos. Além da fonte, o período e a concentração influenciam na modulação do perfil de ácidos graxos.

ABSTRACT: Swine production has focused its efforts to reduce the amount and improve the quality of fat deposited on carcass. Due to the association of the lipid profile with cardiovascular diseases, researches have been developed to understand how the deposition occurs and to improve the fatty acid profile of swine fat. Among the factors that affect the fat composition, race, sex, and diet, the third one has the greatest impact. Lipid inclusion seems to be a promising way to modulate the lipid profile of fat in pig carcass, with an effect on saturated, monounsaturated and polyunsaturated fatty acids. The effect is greater in that fatty acid with the highest concentration in the source used. Soybean oil can double the value of linoleic acid, a by-product of olive oil increases oleic acid by 4%, and flaxseed oil has the ability to increase α-linolenic acid from less than 1% to over 18% in total fatty acids. In addition to the source, the duration and concentration influence the modulation of the fatty acid profile.

RESUMO Este estudo objetivou avaliar os efeitos da enzima fitase e dos grãos secos de destilaria com solúveis (distillers dried grains with solubles - DDGS) sobre digestibilidade, desempenho e viabilidade econômica de suínos em crescimento. Foram realizados dois experimentos, com uma dieta de referência (RD) à base de milho e farelo de soja; RD + 200 g kg -1 DDGS (DDGS); RD + 1.000 unidades de fitase (PHY); e RD + 200 g kg -1 DDGS + 1.000 unidades de fitase (D + P). No experimento 1, oito suínos machos castrados com peso de 29,35 ± 5,74 kg foram usados através do método de coleta total, com repetição no tempo para avaliação da digestibilidade. No experimento 2, 40 suínos machos castrados 47,65 ± 3,99 kg, com cinco repetições de dois animais por unidade experimental foram usados para avaliação de desempenho e viabilidade econômica. DDGS aumentou a excreção de nitrogênio e energia nas fezes e na urina, prejudicando os coeficientes de digestibilidade e a metabolizabilidade da energia. Os animais que consumiram dietas com DDGS apresentaram pior desempenho enquanto a fitase não afetou os resultados. As dietas com a inclusão de 200 g kg -1 DDGS e 1.000 unidades de fitase não diferem no custo por quilograma em relação à dieta de controle.

ABSTRACT This study aimed to evaluate the effects of phytase enzyme and distillers dried grains with solubles (DDGS) on the digestibility, performance and economic viability of growing pigs. Two experiments were conducted with a reference diet (RD) based on corn and soybean meal: RD with 200 g kg -1 DDGS (DDGS); RD + 1,000 units of phytase (PHY); and RD + 200 g kg-1 DDGS + 1,000 units of phytase (D+P). In experiment 1, eight castrated male pigs weighing 29.35 ± 5.74 kg were used through the total collection method and replicates in time for digestibility evaluation. In experiment 2, 40 castrated male pigs 47.65 ± 3.99 kg, with five replicates of two animals per experimental unit, were used for performance and economic evaluation. DDGS increased the excretion of nitrogen and energy in feces and urine, impairing the digestibility coefficients and metabolizability of dietary energy. The animals that consumed diets with DDGS presented the worst performance, while phytase did not influence the results. Diets with the inclusion of 200 g kg -1 DDGS and 1,000 units of phytase did not differ in cost per kilogram compared to the control diet.

ABSTRACT We examined the effect of dried distillers grains with solubles (DDGS) in diets for late gestating sows on sow and litter performance, colostrum chemical composition, and sow behavior. Sixty gestating sows of 3.77±1.65 parity were divided into three groups of 20 animals, in a randomized block design with 0 (corn-soybean meal diet), 150, or 300 g kg−1 DDGS from 84 days of gestation until farrowing. Sows fed 300 g kg−1 DDGS presented a lower frequency of standing position and eating activity. The lying lateral position was more frequent in the first 40 min post-feeding for sows fed the highest DDGS level. There was no effect of diets on sow and litter performance; however, DDGS inclusion tended to increase lactation feed intake. Inclusion of DDGS was inclined to produce more lactose and less protein in colostrum, but did not affect colostrum fat, total solids, and ash contents. Inclusion of up to 300 g kg−1 DDGS in the diet of late gestation sows does not change sow and litter performance and colostrum composition compared with corn-soybean meal diets, but it favored animal welfare.

Abstract An experiment was conducted to evaluate the fatty acid profile of subcutaneous fat from barrowS of same genetic lineage supplemented with organic chromium and selenium initiated in different weight ranges in the finishing phase using 24 carcasses. Three different diets were used that represent the time when supplementation starts: control - without the inclusion of organic Cr and Se; CrSe70 - control with 500 g ton-1 of organic Cr and Se of 70 to 130 kg in body weight; and CrSe100 - control with inclusion of 500 g ton-1 of organic Cr and Se from 100 kg to 130 kg body weight. Performance, carcass characteristics, and lipid profile were evaluated. The data were submitted to analysis of variance, and with significant differences (p<0.05), the means were compared using the Tukey test. From 70 to 100 kg, control and CrSe70 animals consumed less feed than CrSe100. From 100 kg body weight, it reduced the C20:5n3 and C24:1n9 acids and increased the activity of the Δ-6 desaturase, elongase, Δ-5 desaturase enzymes in the supplemented animals. The moment when supplementation starts of organic chromium and selenium does not improve the performance and carcass characteristics, does not change the fatty acid profile, and does not improve the quality of the fat.

RESUMO: Realizou-se este estudo com o objetivo de avaliar os efeitos de níveis de cromo levedura e lisina digestível, desempenho e características de carcaça de suínos em terminação. Foram utilizados 64 machos castrados com peso inicial de 72,77 ± 7,20 kg e final de 119,44 ± 9,47 kg, distribuídos em esquema fatorial 2 x 2, sendo dois níveis (Cr0: 0 ppb e Cr800: 800 ppb) e dois níveis de lisina digestível (L0: nível recomendado e L+10%: 10%). A temperatura do ar registrada de 30,9 ± 3,7 ºC durante o período experimental foi considerada como de estresse por calor. As variáveis de desempenho não foram influenciadas (P>0,05), contudo L+10% aumentou (P<0,05) o consumo de lisina digestível diário. As características de carcaça dos animais não foram influenciadas (P>0,05) pelos níveis de cromo levedura e lisina digestível. A suplementação de 800 ppb de cromo levedura, e o aumento em 10% do nível de lisina digestível, isolados ou associados, não melhoram o desempenho e as características de carcaça de suínos em terminação submetidos a temperaturas ambientais elevadas.

ABSTRACT: This study evaluated the effects of chromium yeast and digestible lysine levels on the performance and carcass characteristics of finishing pigs. Sixty-four barrows with an initial weight of 72.77 ± 7.20 kg and final weight of 119.44 ± 9.47 kg were used, distributed in a 2 x 2 factorial scheme, with two levels of chromium yeast (Cr0: 0 ppb and Cr800: 800 ppb) and two levels of digestible lysine (L0: recommended level and L+10%: 10%). The recorded air temperature of 30.9 ± 3.7 ºC during the experimental period was considered as heat stress. Performance variables were not influenced (P>0.05); however, L+10% showed an increase (P<0.05) in daily digestible lysine intake. Carcass characteristics of the animals were not influenced (P>0.05) by the chromium or digestible lysine levels. Supplementation with 800 ppb of yeast chromium and a 10% increase in the level of digestible lysine, isolated or associated, did not improve the performance and carcass characteristics of finishing pigs, subjected to high ambient temperatures.

RESUMO: Realizou-se este estudo com o objetivo de avaliar as suplementações de cromo e a restrição energética em substituição a ractopamina para leitoas em terminação tardia. Foram utilizadas 60 leitoas, com pesos inicial de 98,87±0,25 kg e final de 122,69 ± 10,97 kg, distribuídas em delineamento de blocos ao acaso com cinco dietas: controle; cromo levedura (0,8 ppm); picolinato de cromo (0,48 ppm); ractopamina (20 ppm) e restrição energética (redução de 150 kcal de EMkg-1 de ração), com seis repetições e dois animais por unidade experimental. A dieta contendo ractopamina proporcionou melhor (P<0,05) conversão alimentar e maior peso de carcaça quente das leitoas. A dieta contendo ractopamina apresentou menor (P<0,05) custo de ração por quilograma de ganho e maior índice de eficiência econômica em relação as dietas contendo cromo e restrição energética que, por sua vez, foram superiores em comparação a dieta controle. Dietas suplementadas com cromo e ractopamina apresentaram maior (P<0,05) percentual e quantidade de carne magra e maior índice de bonificação de carcaça em relação a dieta controle e restrição energética. Concluiu-se que a redução energética não prejudica as respostas das leitoas em relação a dieta controle. A suplementação de ractopamina possibilita melhor conversão alimentar, menor custo de ração por quilograma de ganho e maior índice de eficiência econômica. As suplementações de cromo e ractopamina expressam aumento do percentual e quantidade de carne magra e do índice de bonificação das carcaças. O picolinato de cromo e o cromo levedura são potenciais substitutos a ractopamina para otimizar as características de carcaça das leitoas.

ABSTRACT: This study evaluated chromium supplements and energy restriction as substitutes for ractopamine in the diets of late finishing gilts. Sixty gilts were used, with initial weights of 98.87 ± 0.25 kg and final weights of 122.69 ± 10.97 kg, distributed in a randomized block design with five diets: control; yeast chromium (0.8 ppm); chromium picolinate (0.48 ppm); ractopamine (20 ppm) and energy restriction (reduction of 150 kcal of EM kg-1 of feed), with six replicates and two animals per experimental unit. Feeding diet containing ractopamine enabled better (P<0.05) feed conversion and greater weights of the hot carcass of the gilts. The diet containing ractopamine exhibited a lower (P<0.05) cost of feed per kilogram of gain and higher economic efficiency, when compared to diets containing chromium and energy restriction; these exhibited better outcomes, compared to the control diet. Diets supplemented with chromium and ractopamine resulted in a higher (P<0.05) percentage and quantity of lean meat and a higher rate of carcass bonus, when compared to the control diet and energy restriction. The energy reduction did not harm the gilts’ responses, compared to the control diet. Ractopamine supplementation allowed for a better feed conversion, lower feed cost per kilogram of gain, and a higher economic efficiency index. Supplements of chromium and ractopamine increased the percentage and quantity of lean meat and the bonus index of the carcasses. Therefore, chromium picolinate and chromium yeast are potential substitutes for ractopamine for optimizing the gilts carcass characteristics.

ABSTRACT The objective of the present study was to evaluate the effects of cooling systems by negative pressure versus directed ducts on the performance of lactating sows and their litter. The experiment was conducted in a tropical climatic region in Brazil. Ninety-four lactating sows during 26.2±1.7 days of lactation were included with their 1,236 piglets. Sows were distributed using a completely randomized block design into two treatments: a negative pressure cooling (NPC) system and a directed duct cooling (DDC) system. We adopted sow parity as blocking criterion. During the experimental period, environmental temperatures inside the farrowing rooms were 22.9±1.5 and 25.4±2.5 °C, respectively, using the NPC and DDC systems. Sow daily feed intake, litter weight at weaning, piglet weight at weaning, litter daily weight gain, piglet daily gain, and daily milk production per sow were greater in the NPC system than in the DDC system. The type of cooling system did not affect piglet weight after standardization, mortality, number of piglets weaned per sow, and estrus return. The use of an NPC system can reduce the effects of higher environmental temperatures better than the DDC system. The NPC system allowed for greater feed intake, piglet and litter weight gain, weight of piglets and litter at weaning, and milk production compared with the DDC system.