摘要
为探讨日粮酸性洗涤纤维与粗蛋白比(ADF/CP)对奶牛瘤胃内环境的影响,将奶牛常用饲料配合成ADF/CP为1.3、1.4、1.5、1.7和1.9的五种日粮,应用短期人工瘤胃技术,测定瘤胃液pH、氨氮(NH3-N)浓度、微生物蛋白(MCP)产量和挥发性脂肪酸(VFA)浓度,研究不同ADF/CP对奶牛瘤胃内环境的影响。结果表明:不同ADF/CP对瘤胃pH影响不显著(P>0.05);而在NH3-N浓度上ADF/CP为1.4组低于ADF/CP为1.5、1.7和1.9组(P<0.01),与1.3组差异不显著(P>0.05);在MCP产量上ADF/CP为1.4和1.5两个组极显著高于其他三个组(P<0.01),而两个组间差异不显著(P>0.05);在VFA浓度方面上ADF/CP为1.4组显著或极显著高于其他组(P<0.05或P<0.01),在乙酸丙酸比上各组间差异不显著(P>0.05)。综上:在本试验设计条件下,日粮ADF/CP为1.4时最有利于奶牛瘤胃内环境。
The study was conducted by using short-term artificial rumen technique to investigate the effects of dif- ferent ADF/CP（acid detergent fiber -to-crude protein ratio）on ruminal environment by determining pH, NH3-N （Ammonia nitrogen） concentration, （microbial crude protein MCP） and （volatile fatty acid VFA） concentration.The diet for dairy cows were combinated by ADF/CP of which were 1.3,1.4,1.5,1.7 and 1.9,respectively.The results showed that： there were no significant influence in different ADF/CP on rumen pH （P 〉 0.05） ;Rumen NH3-N concentration of the group ADF/CP of 1.4 was lower than that of 1.5,1.7 and 1.9（P 〈 0.01） ,but there were no difference between 1.3 and 1.4（P 〉 0.05） ;there were no difference between the groups ADF/CP of which were 1.4 and 1.5 in MCP,but those two were very significantly higher than other three groups（P 〈 0.01 ）;and the group ADF/CP of which wasl.4 was higher than others in VFA concentration（P 〈 0.05 or P 〈 0.01 ）,there were no significant difference in all groups in Acetic-to-ropylic ratio.It concluded that the group ADF/CP of which was 1.4 was the best for ruminal environment in this experiment.
出处
《中国饲料》
北大核心
2011年第20期24-27,共4页
China Feed
基金
山东省农业重大应用技术创新课题"奶牛精细饲养管理应用技术研究"
