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Effects of Ruminally Infusing Different Mixtures of VFA on Energy Conversion in Beef Cattle
Author(s): 
Pages: 3-5
Year: Issue:  6
Journal: CHINESE JOURNAL OF ANIMAL SCIENCE

Keyword:  肉牛瘤胃灌注VFA瘤胃发酵能量和氮代谢;
Abstract: 以装有瘤胃瘘管的肉牛(390±30kg)饲喂全羊草的基础日粮,瘤胃灌注4种不同摩尔比例的混合VFA(乙酸:丙酸:丁酸为75∶15∶10,65∶25∶10,55∶35∶10和45∶45∶10),按4×4拉丁方试验设计测定了灌注后代谢产热率(HP/ME),VFA转化为体脂肪的效率(Kf)和可消化氮转化为沉积氮的效率.结果表明,随着灌注混合VFA中丙酸比例超过25%,HP/ME明显降低(P<0.05),Kf值极显著地增加(P<0.01);可消化氮转化为沉积氮的效率显著增加(P<0.05);HP/ME与瘤胃中乙酸比例、Kf值与瘤胃液中丙酸比例均呈线性正相关.
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