Desempenho, digestibilidade aparente e características de carcaça de cabritos Boer x Saanen confinados, recebendo rações com casca do grão de soja em substituição ao milho

• Autor(a) principal: Hashimoto, Juliano Hideo
• Data de Publicação: 2005
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)
• Texto Completo: http://repositorio.uem.br:8080/jspui/handle/1/1713
• topic: Caprino; Nutrição animal; Casca do grão de soja; Desempenho; Subprodutos; Brasil.; Caprino; Animal Nutrition; Bark soybean; Performance; Byproducts; Brazil.; Ciências Agrárias; Zootecnia

: The objective of this work was to evaluate the performance, apparent digestibility, the quantitative characteristics of carcasses, profit of the cuts, proportion of tissues, the chemical composition and the fatty acid profile of the muscle Longissimus dorsi, and the components of the alive weight of feedlot Boer x Saanen goat kids, receiving rations with soybean hulls (SH) in substitution to the corn ground grain (CGG). Twenty-seven Boer x Saanen goat kids were used, being 15 males and 12 females, with initial body weight of 25.75 ± 3.80 kg, in randomly distributed. After reach body weight of 30.76 ± 3.98 kg, the males were slaughtered. The rations were constituted by star grass hay (Cynodon spp), soybean meal and minerals, being the treatments constituted by 0% (CGG), 50% (SH50) e 100% (SH100) of the substitution of the corn by the soybean hulls. The experimental period was of 42 days and the digestibility of the nutrients was determined by the indigestible neutral detergent fiber (iNDF) as marker. There was no difference (P>0.05) among the treatments for ingestion of dry matter (DM), organic matter (OM), crude protein (CP), average daily gain and feed conversion. The use of the soybean hulls affected (P<0.05) the ingestion of starch and NDF, and the digestibility coefficients (D) of DM, OM, CP, NDF and starch, promoting a decrease in DMD, OMD, CPD and increase in NDFD and starchD in the rations with soybean hulls. The DM in vitro digestibility was better (P<0.05) for the treatment CGG, having no difference (P>0.05) among the treatments for the digestibility of the cellular wall. The soybean hulls presented 23.87%, 0.19%, 55.89%, 20.05% of fractions A, B1, B2 and C of the carbohydrates and 35.22%, 8.19%, 31.61%, 15.46%, 9.52% of fractions A, B1, B2, B3 and C of the protein. The carcass characteristics were not altered (P>0.05) by the treatments. The utilization of the soybean hulls promoted difference (P<0.05) among the treatments for the profit of the commercial cuts of loin and neck. Among the components of the alive weight, just the liver profit presented difference (P<0.05), being higher in the SH100 treatment. The percentage of meat of the muscle Longissimus dorsi was not influenced (P>0.05) by the treatments, however, the animals that received CGG treatment presented higher proportions (P<0.05) of fat and smaller of bone. Difference was not observed (P>0.05) among the treatments for the centesimal composition and the fatty acid profile. However, for the goat kids fed with soybean hulls, it was verified (P<0.05) higher cholesterol. The soybean hulls can be used as a substitute of the corn in rations without altering the performance, the characteristics of the carcasses and the fatty acid profile of growth kids, however it alters the apparent digestibility, reducing the digestibility of the dry matter, of the organic matter and of the protein, and increasing the NDF.