中国畜牧杂志2012，Vol.48Issue(17)：31-35,5.
日粮中尿素氨化稻草水平对体外培养发酵总产气量、氨态氮和pH值的影响
Effect of Urea-Ammoniated Rice Straw on Total Gas Production,NH3-N and pH in vitro Incubation
摘要
Abstract
The objective of the experiment was to study effects of urea -ammoniated straw rice and concentrate/ roughage ratio on total gas production in vitro. Two Simmental cattle fitted with rumen cannulas were used as donors of rumen fluid. Rice straw ammoniated with three levels of urea, i.e. 0%, 4% and 6% urea was mixed with concentrates at six ratios, respectively. The concentrate/roughage ratios are 0:100,20-80,40:60,60:40,80:20 andlOO:Orespectively. Total gas production was determined using in vitro incubation technique at 2, 4, 8, 12, 24, 36 and 48 h, respectively.The results indicated that the to tal gas production increased with concentrate/roughage ratio in the same level of the urea-ammoniated rice straw,and concentrate/roughage ratio of lOO:0 group was significantly higher than 0-100 group (P<0.0l). The 48 h gas production of 4% urea-ammoniated rice straw was much higher than unammoniated nee straw (P<0.05), and higher than 6% urea-ammoniated rice straw when concentrate/roughage ratio was 40:60. No differences were found in 48 h total gas production among three levels of urea-ammoniated rice straw in other groups (P>0.05). The results suggestedthat the digestibility of rations was the best when rice straw was ammoniated with 4% urea and mixed with concentrates at the ratio 40:60.关键词
尿素/氨化稻草/精粗比/产气量Key words
urea/ ammoniated rice straw/ concentrate/roughage ratio/gasproduction分类
农业科技引用本文复制引用
王满红,赵广永,董瑞兰,郑文思..日粮中尿素氨化稻草水平对体外培养发酵总产气量、氨态氮和pH值的影响[J].中国畜牧杂志,2012,48(17):31-35,5.基金项目
科技部“十二五”科技支撑计划(2011BAD26B0304) （2011BAD26B0304）
现代农业产业技术体系北京市奶牛创新团队 （）
