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首页> 外文会议>International Symposium on the Nutrition of Herbivores(ISNH-7); 20070917-22; Beijing(CN) >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：聚氨酯包覆尿素对玉米片玉米日粮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：饲料级尿素（FGU），豆粕（SBM）和聚氨酯涂覆的尿素（PCU）用于研究不同氮源对体外瘤胃氨释放和其他发酵特性的影响。结果表明，发酵前8 h，PCU和SBM日粮中的NH3-N含量相似，比FGU日粮中的NH3-N含量降低了8.2-20.6％（P ＜0.01）。体外瘤胃pH，24小时产气量，总VFA和各个VFA摩尔比例不受氮源的影响，但体外24小时瘤胃干物质消化率（SBM日粮的FUM和PGU值较高（P ＜0.05））除外。 PCU饮食。结论是PCU补充剂可以降低瘤胃中氨的释放，这与SBM相似，并且优于FGU。

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