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首页> 外文会议>International Symposium on the Nutrition of Herbivores >Effect of polyurethane coated urea on ruminal ammonia release and fermentation characteristics in vitro of steam-flaked maize-based diet
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Effect of polyurethane coated urea on ruminal ammonia release and fermentation characteristics in vitro of steam-flaked maize-based diet

机译：聚氨酯涂覆尿素对蒸汽玉米饮食体外瘤胃氨释放和发酵特性的影响

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摘要

Feed-grade urea (FGU), soyabean meal (SBM) and polyurethane coated urea (PCU) were used to investigate the effect of different nitrogen sources on ruminal ammonia release and other fermentation characteristics in vitro. The results showed NH3-N concentrations of PCU and SBM diets were similar during first 8 h of fermentation and were significantly lower by 8.2-20.6% than that of FGU diet (P＜0.01). In vitro ruminal pH, 24-h gas production, total VFA and individual VFA molar proportions were not affected by nitrogen sources, except for 24-h ruminal dry matter digestibility in vitro that was higher (P＜0.05) for SBM diet than FGU and PCU diets. It was concluded that PCU supplement could slower ruminal ammonia release, which was similar with SBM and better than FGU.
机译：使用饲料级尿素（FGU），大豆膳食（SBM）和聚氨酯涂覆的尿素（PCU）来研究不同氮源对瘤胃氨释放和体外其他发酵特性的影响。结果表明，在发酵8小时内，PCU和SBM饮食的NH 3-N浓度相似，比FGU饮食显着降低8.2-20.6％（P <0.01）。在体外瘤胃pH值，24-H天然气生产，总VFA和单独的VFA磨牙比例不受氮源的影响，除了24-H振动干物质消化率，对于SBM饮食而不是FGU和SBM Diat（P <0.05） PCU饮食。得出结论认为，PCU补充剂可能会慢肿瘤释放，这与SBM相似，而且比FGU更好。

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