
Foi realizada análise bromatológica da casca do grão de soja (CGS), farelo de soja, milho moído e farelo de trigo; ensaio de digestibilidade in vitro da matéria seca (DIVMS) e da parede celular (DIVPC) dos referidos alimentos; e degradabilidade in situ da matéria seca (MS), matéria orgânica (MO) e energia bruta (EB), da CGS moída (CSM) ou peletizada (CSP). Para a determinação da DIVMS e DIVPC, foram realizadas três coletas de líquido ruminal, com intervalos de uma semana. Para a determinação da degradabilidade in situ da MS, MO e EB, foram utilizadas três vacas munidas de fistula ruminal. Os tempos de incubação foram: 3, 6, 12, 24 e 48 horas, sendo que o tempo zero foi realizado no laboratório. Foram determinadas as percentagens de degradação e das degradabilidades efetivas para MS, MO e EB. A partir dos resultados encontrados, conclui-se que a CGS pode ser utilizada como um alimento alternativo nas rações de bovinos.
The experiment was divided into three parts: composition analysis of soybean hulls (SH), soybean meal, ground corn and wheat meal; in vitro digestibility of dry matter (IVDDM) and cellular wall (IVDCW) of the feeds mentioned above; in situ degradation of dry matter (ISDDM), organic matter (ISDOM) and gross energy (ISDGE), of milled (MSH) or pelleted (PSH) soybean hulls. Three collections of rumen liquid were undertaken for IVDDM and IVDCW at weekly intervals. Three rumen fistulated cows were utilized for the estimates of ISDDM, ISDOM and ISDGE. Incubation periods were 3, 6, 12, 24, 48 hours, whereas zero time was achieved in the laboratory. Degradation percentages and the percentages of real degradability for dry matter, organic matter and gross energy were reported. Results showed that SH could be used as an alternative food in cattle rations.
degradabilidade in situ, 5.04.00.00-2 Zootecnia, composição química, bovinos, digestibilidade in vitro
degradabilidade in situ, 5.04.00.00-2 Zootecnia, composição química, bovinos, digestibilidade in vitro
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