Substitution of Wheat for Corn in Beef Cattle Diets: Digestibility, Digestive Enzyme Activities, Serum Metabolite Contents and Ruminal Fermentation

文献类型： 外文期刊

第一作者： Liu, Y. F.

作者： Liu, Y. F.;Zhao, H. B.;Liu, X. M.;You, W.;Cheng, H. J.;Wan, F. C.;Liu, G. F.;Tan, X. W.;Song, E. L.;Zhang, X. L.;Liu, Y. F.;Zhao, H. B.;Liu, X. M.;You, W.;Cheng, H. J.;Wan, F. C.;Liu, G. F.;Tan, X. W.;Song, E. L.;Zhang, X. L.

作者机构：

关键词： Beef Cattle;Digestibility;Digestive Enzyme Activities;Serum Metabolite Contents;Ruminal Fermentation;Wheat

期刊名称：ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES （ 影响因子：2.509； 五年影响因子：2.604 ）

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年卷期：

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收录情况： SCI

摘要： The objective of this study was to evaluate the effect of diets containing different amounts of wheat, as a partial or whole substitute for corn, on digestibility, digestive enzyme activities, serum metabolite contents and ruminal fermentation in beef cattle. Four LimousinxLuXi crossbred cattle with a body weight (400 +/- 10 kg), fitted with permanent ruminal, proximal duodenal and terminal ileal cannulas, were used in a 4x4 Latin square design with four treatments: Control (100% corn), 33% wheat (33% substitution for corn), 67% wheat (67% substitution for corn), and 100% wheat (100% substitution for corn) on a dry matter basis. The results showed that replacing corn with increasing amounts of wheat increased the apparent digestibility values of dry matter, organic matter, and crude protein (p<0.05). While the apparent digestibility of acid detergent fiber and neutral detergent fiber were lower with increasing amounts of wheat. Digestive enzyme activities of lipase, protease and amylase in the duodenum were higher with increasing wheat amounts (p<0.05), and showed similar results to those for the enzymes in the ileum except for amylase. Increased substitution of wheat for corn increased the serum alanine aminotransferase concentration (p<0.05). Ruminal pH was not different between those given only corn and those given 33% wheat. Increasing the substitution of wheat for corn increased the molar proportion of acetate and tended to increase the acetate-to-propionate ratio. Cattle fed 100% wheat tended to have the lowest ruminal NH3-N concentration compared with control (p<0.05), whereas no differences were observed among the cattle fed 33% and 67% wheat. These findings indicate that wheat can be effectively used to replace corn in moderate amounts to meet the energy and fiber requirements of beef cattle.

分类号： Q95

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