RESUMO -Objetivou-se avaliar o efeito da suplementação nas características de carcaça de cabritos F1 Boer × SRD terminados em pastagem nativa. Foram utilizados 24 caprinos F1 Boer × SRD, não-castrados, com 120 dias de idade e com peso vivo inicial de 15,52 kg. Os animais foram identificados, vermifugados e distribuídos de forma aleatória em quatro níveis de suplementação (0,0; 0,5; 1,0 e 1,5%), perfazendo seis repetições por tratamento. O manejo alimentar consistiu de pastejo com lotação contínua das 7h30 às 16 h, quando os animais foram recolhidos às baias para suplementação em gaiolas individuais equipadas com cochos e bebedouros. O trato gastrintestinal (TGI) foi pesado cheio e vazio, assim como a bexiga e a vesícula biliar, para obtenção do peso de corpo vazio (PCV). O rendimento dos órgãos e das vísceras apresentou tendência diferente à observada para peso absoluto, exceto para rendimento das patas, que apresentou comportamento linear decrescente. Os pesos e os rendimentos da carcaça quente e fria, bem como o peso do corpo vazio e o rendimento biológico, apresentaram resposta positiva aos níveis de suplementação. Na análise da participação dos cortes comerciais na carcaça, apenas o rendimento do Effect of supplemental feeding on carcass and non-carcass characteristics of F1 (Boer × SRD) goats finished on native pastureABSTRACT -The objective of this study was to evaluate the effect of supplementation on the carcass characteristics of crossbred Boer goats finished on native pasture. Twenty-four Boer crossbreed goats were used, 120 days old and with an initial 15.52 kg BW. The supplemental feeding was randomly assigned to the animals according to a completely randomized design with 4 supplementation levels (0.0, 0.5, 1.0 and 1.5%) and six replications (goats). The animals had access to the pasture from 7:30 a.m. until 4 p.m. throughout the experimental period and were taken to stalls to receive supplemental feeding in individual cages equipped with hods and a water. Full and empty digestive tract (DT) were weighed, as well as the bladder and gall bladder to obtain the empty body weight (EBW). The visceras yield tended to be different from that observed for absolute weight, except for hoof yield that presented a decreasing linear behavior. The hot and cold carcass weights and the yields and the empty body weight and the biological yield presented positively response to the supplementation levels.Regarding the participation of wholesale cuts in the carcass, only the neck yield presented linear effect in response to the increase in supplementation levels. Full digestive tract and digestive content weights did not respond to the supplementation levels. The digestive content weight was decisive for the effect of supplemental feeding in the full digestive tract weight.Wholesale cuts weight responded positively to the supplementation levels.

-The present study aimed to assess the effect of supplementation on the performance of F1 (Boer × females of no defined breed) goats finished in native pasture. The experiment was conducted at the Universidade Federal de Campina Grande, Patos Campus, Paraíba, Brazil, with twenty-four 120-day-old non-castrated F1 (Boer × NDB) male goats, with a 15.52 kg live weight (LW). Animals were distributed in four levels of supplementation (0.0; 0.5; 1.0; 1.5% of body) and six replicates. In order to perform the evaluation of dry matter availability, the herbaceous vegetation was divided into grass and herbaceous dicotyledon and evaluated at the beginning (5/28/2007), in the middle (7/9/2007) and at the end (8/6/2007) of the experiment. In the beginning of the experiment, the availability of grass dry matter was 1,102.89 kg/ha, and at the end of the experiment, the availability of the referred matter was greater (1,494.81); on the other hand, the opposite occurred for the dicotyledons, with a dry matter content of 1,759.46 kg/ha in the beginning of the experiment, and only 236.76 kg/ha at the end of the experiment. Supplementation made it possible to estimate the increase in dry matter intake of 257.15 g/day and of 20.79 g/kg 0.75 /day, as well as the daily weight gain of 103 g for each percentage point increase that resulted from supplementation. The availability and nutritional quality of forage had a strong influence on the effect of supplementation on dry matter intake, with a negative response for supplementation levels of up to 0.74% of the live weight Consequently, the finishing of F1 crossbred goats in a grazing area in the Caatinga can be improved with the supplementation of concentrate at levels 1.0 to 1.5% of the live weight.

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