摘要
为探究全混合日粮(TMR)饲养条件下奶牛瘤胃发酵参数的变化规律,以3头装有永久性瘤胃瘘管的中国荷斯坦奶牛为试验动物,采用TMR饲养,测定了瘤胃24h挥发性脂肪酸(VFA)浓度及pH值。结果表明:在TMR条件下,试验奶牛瘤胃液pH值的变化范围为5.86～6.51,各时间点之间差异不显著(P>0.05);乙酸浓度、丙酸浓度、丁酸浓度变动范围分别为69.62～85.71mmol/L、19.33～25.91mmol/L、10.44～14.02mmol/L,且3种VFA出现最高浓度和最低浓度的时间点均为20:00和08:00;乙酸/丙酸值的变动范围为3.31～3.61,且在20:00比值最小,在8:00比值最大。综合分析显示,TMR技术有利于奶牛瘤胃丙酸型发酵,提高生产效益。
A total of three China Hostain cow fitted with ruminal fistula were used to determine the vary law in 24 h of the ruminal intemal environment parameters under the Total Mixed Ration（TMR） technology.The results showed that the rumen pH value changed over time and the average pH was 5.86-6.51,but no significant changes were observed at each time point.The average concentration of acetic acid,third acid and butyric acid was 69.62-85.71 mmol/L,19.33-25.91 mmol/L and 10.44-14.02 mmol/L,respectively.The maximum and lowest concentrations of three VFA appeared at 20：00 and 08：00.The average of acetic acid/propionic acid varied from 3.31 to 3.61,with the minimum and maximum levels appearing at 20：00 and 8：00 respectively.Comprehensive analysis showed that the TMR technology was conductive to rumen propionic acid type fermentation to improve production efficiency of cow.
出处
《河南农业科学》
CSCD
北大核心
2012年第5期154-157,共4页
Journal of Henan Agricultural Sciences
基金
周口师范学院青年科研基金(zknuqn201030A)
作者简介
盛东峰（1978-），男，河南周口人，讲师，硕士，主要从事动物营养与饲料学的教学与研究工作。E—mail：shengdongfeng@126．com
