Abstract The aim of this work was to determine the sensory quality (flavour, odour, tenderness, juiciness and overall acceptability) and physicochemical characteristics of meat from Santa Inês lambs fed with diets containing guava agroindustrial by-product (GAB). Was used samples of the longissimus lumborum of 40 entire males with an average slaughter weight of 32.0 kg, after approximately 105 days in a feedlot. Animals were randomly placed into four treatments (10 replicates per treatment) and fed with different levels of GAB (0, 20, 40 and 60%). Among the attributes examined, only odour was not influenced by the GAB. Inclusion of 40% GAB in diets (in place of corn) produced meat which satisfied consumer demands in terms of fresh colour, although with less intense flavour and tenderness. Although the factors juiciness and overall acceptability did not differ among the highest levels of GAB, we recommend to use GAB addition of up to 40% to avoid compromising on animal performance and consumer sensory characteristics.

ABSTRACT This study evaluated the effects of replacing ground corn with dehydrated guava (Psidium guajava L.) byproduct, at concentrations of 0.0, 8.2, 16.4, and 24.6% on the intake and digestibility of nutrients as well as on productive and economic performance of lambs. The study included 40 uncastrated feedlot Santa Inês sheep with an average age of 120 days and an average initial weight of 17.4±1.27 kg, distributed in individual stalls in a completely randomized design with four treatments and 10 replicates. Santa Inês sheep fed diets containing higher levels (16.4%) of guava byproduct showed lower weight gain and feed conversion and reached slaughter weight later. Replacing corn with guava byproduct at higher levels increased acid detergent fiber and reduced non-fiber carbohydrate intake and nutrient digestibility. The inclusion of up to 16.4% of guava byproduct in the diet of feedlot sheep is appropriate for maintaining good performance and economic viability of the system.

RESUMO O objetivo com este estudo foi avaliar a biometria, morfometria e os órgãos não-componentes da carcaça de ovinos Santa Inês, em confinamento, alimentadas com níveis crescentes (0; 20; 40 e 60% na matéria seca) de subproduto agroindustrial da goiaba como um substituto para o milho. Quarenta ovinos Santa Inês, machos (não castrados), com média de 17,41 ± 1,27kg de peso corporal (PC) e 120 dias de idade no início do estudo, foram utilizados neste experimento. Os animais foram abatidos aos 32kg ou 105 dias de confinamento. Foi utilizado o delineamento inteiramente casualizado, com dez repetições por tratamento. Os animais submetidos a dietas com 60% de substituição apresentaram menor comprimento corporal (63,20cm), menor altura de cernelha (67,30cm) e de garupa (69,50 cm), baixo escore de condição corporal (2,40 pts), carcaças de conformação inferior (2,25 pts), menor perímetro do tórax (65,10cm) e baixos rendimentos de órgãos como coração (0,52%), baço (0,15%), rins (0,25%) e pulmão (0,89%). O milho pode ser substituído pelo subproduto da goiaba em níveis de até 40%, sendo relevante a obtenção de animais com características corporais desejáveis para produção de carne e com rendimento de órgãos não constituintes da carcaça satisfatórios ao mercado.

SUMMARY The objective of this study was to evaluate the biometrics, morphometry and the organs do non-constituents of the carcass of feedlot Santa Inês sheep fed with increasing levels (0; 20; 40 and 60% dry matter basis) of guava agroindustrial by-products as a replacement for corn. Forty male (noncastrated) Santa Inês sheep, averaging 17.41 ± 1.27 kg body weight (BW) and 120 days of age at the beginning of the study, were used in this trial. The animals were slaughtered at 32 kg or 105 days of confinement. A completely randomized design with ten replicates per treatment was used. The animals submitted to diets with 60% substitution showed lower body length (63.20cm), lower withers height (67.30cm) and hip (69.50cm), low body condition score (2.40 pts), lower carcass of conformation (2.25 pts), lower chest perimeter (65.10cm) and low yields of organs such as heart (0.52%), spleen (0.15%), kidneys (0, 25%) and lung (0.89%). Corn can be replaced by guava agroindustrial by-product at levels up to 40%, being relevant to obtain animals with body characteristics desirable for meat production and yield of organs non-constituents of carcass satisfactory to the market.

Objetivou-se avaliar a influência do uso de feno de flor-de-seda em substituição ao milho e ao farelo de soja nas características físico-químicas e sensoriais da carne de cordeiros. Utilizaram-se 32 cordeiros Morada Nova, machos não-castrados (12,7 ± 2 kg de peso vivo inicial), em confinamento, distribuídos em delineamento inteiramente ao acaso com quatro níveis (0, 15, 30 e 45% com base na MS). A utilização de feno de flor-de-seda na dieta influenciou a qualidade da carcaça e da carne, o peso da perna, a composição tecidual, a umidade, a suculência e o sabor. A substituição do milho (26,67%) e da soja (3,33%) pelo feno de flor-de-seda não altera composição tecidual, relação e índice de muscularidade da perna e os parâmetros físico-químicos do músculo semimembranosus de cordeiros Morada Nova.

The objective of this work was to evaluate the influence of using silk flower hay replacing corn and soybean meal on physical-chemical and sensorial traits of lamb meat. It was used 32 intact Morada Nova male lambs (12.7 ± 2 kg initial body weigth) on feedlot system, distributed in a completely randomized design with four levels (0, 15, 30 and 45% on dry matter basis). The use of silk flower hay in the diet influenced quality of meat and carcass, leg weight, tissue composition, moisture, juiciness and flavor. Replacing corn (26.67%) and soybean (3.33%) with silk flower hay does not affect the tissue composition, ratios and muscularity index of leg and physical-chemical parameters of semimembranosus muscle of Morada Nova lambs.