Diets of differentially processed wheat alter ruminal fermentation parameters and microbial populations in beef cattle
文献类型: 外文期刊
第一作者: Jiang, S. Z.
作者: Jiang, S. Z.;Yang, Z. B.;Yang, W. R.;Zhang, C. Y.;Li, Z.;Liu, X. M.;Wan, F. C.;Liu, X. M.;Wan, F. C.
作者机构:
关键词: beef cattle;feed processing;fermentation parameters;microbial population;wheat
期刊名称:JOURNAL OF ANIMAL SCIENCE ( 影响因子:3.159; 五年影响因子:2.912 )
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收录情况: SCI
摘要: The influences of differently processed wheat products on rumen fermentation, microbial populations, and serum biochemistry profiles in beef cattle were studied. Four ruminally cannulated Limousin x Luxi beef cattle (400 +/- 10 kg) were used in the experiment with a 4 x 4 Latin square design. The experimental diets contained (on a DM basis) 60% corn silage as a forage source and 40% concentrate with 4 differently processed wheat products (extruded, pulverized, crushed, and rolled wheat). Concentrations of ruminal NH3-N and microbial protein (MCP) in cattle fed crushed and rolled wheat were greater (P < 0.05) than the corresponding values in cattle fed pulverized and extruded wheat. Ruminal concentrations of total VFA and acetate and the ratio of acetate to propionate decreased (P < 0.05) with increased geometric mean particle size (geometric mean diameter) of processed wheat, except for extruded wheat; cattle fed extruded wheat had the lowest concentrations of total VFA and acetate among all treatments. The relative abundance of Ruminococcus flavefaciens, Prevotella ruminicola, ciliated protozoa, and Butyrivibrio fibrisolvens was lower in cattle fed the pulverized wheat diet than in the other 3 diets (P < 0.05), whereas the relative abundance of Streptococcus bovis was decreased in cattle fed extruded wheat compared with cattle fed crushed and rolled wheat (P < 0.05). No treatment effect was obtained for serum enzyme activity and protein concentration (P > 0.05). Our findings suggest that the method of wheat processing could have a significant effect on ruminal fermentation parameters and microbial populations in beef cattle and that crushed and rolled processing is better in terms of ruminal NH3-N and MCP content, acetate-to-propionate ratio, and relative abundance of rumen microorganisms.
分类号: Q95
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