SciELO - Scientific Electronic Library Online

 
vol.31 número3Efeito de dois regimes de suplementação alimentar e dois sistemas de produção, nos constituintes sangüíneos de cabras Saanen durante a lactaçãoDigestão total e parcial de alguns componentes de dietas contendo diferentes níveis de casca de soja e Fontes de nitrogênio, em bovinos índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Zootecnia

versão impressa ISSN 1516-3598versão On-line ISSN 1806-9290

Resumo

SILVA, Leandro das Dores Ferreira da et al. Dry matter and crude protein in situ ruminal degradability of two varieties of ground soybean with different levels of trypsin inhibitor in cattle. R. Bras. Zootec. [online]. 2002, vol.31, n.3, pp.1251-1257. ISSN 1806-9290.  https://doi.org/10.1590/S1516-35982002000500023.

Four ruminally fistulated Holstein, distributed in randomized blocks and fed with coastcross grass, were used. They were supplemented with 2 kg of concentrate containing ground soybean, put through the rumen fistula daily, at 7 a.m. and 6 p.m. Nylon bags were incubated into the rumen of each animal, and contained samples of each of the following feed: ground soybean (S); low fat ground soybean (LFS); ground low trypsin inhibitor soybean (LTIS); ground low fat and low trypsin inhibitor soybean (LFLTIS); and soybean meal (SM). Dry matter (DM), organic matter (OM) and crude protein (CP) solubility and disappearance into the rumen were determined after 6, 24 and 48 hours of incubation. The DM, OM and CP solubilities of S were higher than low trypsin inhibitor soybean. The DM and OM effective degradability (ED) of LTIS was about 9% lower than the observed values of S and the ED of the LTIS crude protein was about 6% lower. All feedstuffs showed high degradation rate for the studied nutritive components, with fermentation rates varying from 5% for SM to 15%/hour for LFLTIS. The LTIS showed the lowest nutritive component degradation. The values suggest that these feedstuffs should be associated with others with low degradation velocity for ruminant feed as a way of improving the synchronization between the release of ammonia, aminoacid, peptides and ketoacids into the rumen, when the increase of microbial protein yield and/or increase the amount of bypass protein is necessary.

Palavras-chave : solubilidade; matéria orgânica; degradabilidade potencial; degradabilidade efetiva; taxa de degradação.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons