Digestão total e parcial de alguns componentes de dietas contendo diferentes níveis de casca de soja e Fontes de nitrogênio, em bovinos
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Data
2002-06-01
Autores
Silva, Leandro das Dores Ferreira da
Ezequiel, Jane Maria Bertocco [UNESP]
Azevedo, Paulo Sérgio de [UNESP]
Cattelan, José Wanderley [UNESP]
Barbosa, José Carlos [UNESP]
Resende, Flávio Dutra de
Carmo, Flávio Roberto Gonzaga do [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Este experimento foi realizado para avaliar o efeito de dois níveis de casca de soja (CS) e de três fontes de nitrogênio sobre a digestão total e parcial aparentes no rúmen e nos intestinos. Seis novilhos Holandês x Zebu com idade média de 12 meses e 229 kg de PV foram fistulados no rúmen e no abomaso e distribuídos em quadrado latino 6x6 e alimentados individualmente ad libitum. O consumo e as digestibilidades totais e parciais dos nutrientes foram avaliados. Não houve efeito da fonte de proteína sobre o consumo, quantidades de matéria seca (MS), matéria orgânica (MO), proteína bruta (PB), fibra em detergente neutro (FDN) e da fibra em detergente ácido (FDA) no rúmen, no abomaso e nas fezes e sobre os coeficientes de digestibilidades destes componentes. O aumento, porém, do nível de casca de soja elevou os coeficientes de digestibilidade de todos os componentes estudados nos locais do trato digestivo, com exceção nos intestinos, onde o nível de casca de soja não afetou a digestão da PB, FDN e da FDA. Os resultados indicam que a casca de soja pode substituir tanto o milho como, parcialmente, a fração volumosa nas rações de ruminantes. A farinha de subproduto avícola e a amiréia podem substituir o farelo de soja nas rações de bovinos sem reflexos negativos sobre a digestão de seus componentes nutritivos.
This experiment was conducted to evaluate the effect of two levels of soybean hulls and three sources of protein on the total and partial rumen and intestinal digestion. Six Holstein-Zebu steers averaging twelve months of age and 229 kg BW were fistulated in the rumen and in the abomasum and distributed in a 6x6 Latin square and fed ad libitum individually. The consumption and the total and partial digestibility of the nutrients were evaluated. There was no effect of the source of protein on consumption, amounts of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) in the rumen, abomasum and in the faeces and on the digestibility coefficients of these components. on the other hand, increasing the levels of soybean hulls significantly increased the coefficients of digestibility in the whole digestive tract. However, the levels of soybean hulls did not affect the digestion of CP, NDF and ADF in the intestines. The results indicate that soybean hulls can replace maize, due their degradation similarity, and can partially replace the roughage in rations for ruminants, by having high levels of fiber with great potential and speed of ruminal fermentation. Poultry by-product meal and starea can replace soybean meal without negative effects on the digestion of their nutritive components.
This experiment was conducted to evaluate the effect of two levels of soybean hulls and three sources of protein on the total and partial rumen and intestinal digestion. Six Holstein-Zebu steers averaging twelve months of age and 229 kg BW were fistulated in the rumen and in the abomasum and distributed in a 6x6 Latin square and fed ad libitum individually. The consumption and the total and partial digestibility of the nutrients were evaluated. There was no effect of the source of protein on consumption, amounts of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) in the rumen, abomasum and in the faeces and on the digestibility coefficients of these components. on the other hand, increasing the levels of soybean hulls significantly increased the coefficients of digestibility in the whole digestive tract. However, the levels of soybean hulls did not affect the digestion of CP, NDF and ADF in the intestines. The results indicate that soybean hulls can replace maize, due their degradation similarity, and can partially replace the roughage in rations for ruminants, by having high levels of fiber with great potential and speed of ruminal fermentation. Poultry by-product meal and starea can replace soybean meal without negative effects on the digestion of their nutritive components.
Descrição
Palavras-chave
Dry matter, lignin, poultry by-product meal, starea, Soybean meal, Crude protein, matéria seca, lignina, farinha de subproduto avícola, amiréia, farelo de soja, Proteína bruta
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 31, n. 3, p. 1258-1268, 2002.