草业科学2011，Vol.28Issue(10)：1894-1900,7.
体外产气法评价青海高原反刍家畜常用粗饲料组合效应
Evaluation of associate effects of ruminants forages in the Qinghai Plateau using in vitro gas production technique
摘要
Abstract
The in vitro gas production technique was used to evaluate associate effects of mixed with two ruminants forages of silage corn-straw, alfalfa green hay and oat green hay with 0 ： 100, 25 ： 75, 50 ： 50, 75 ： 25 and 100 ： 0 in the Qinghai plateau. This study showed that 48 h gas production and theoretical maximum gas production were positively related to the content of NDS/CP（P〈0. 001）, OM（P〈0.01）, NDS（P〈0.05）, and negatively related to the content of ADF（P%0. 001）, NDF（P〈0.05）, CP（P〈 0.05）. Gas producing velocity were positively related to the content of OM（P〈0. 001）, NDS（P%0. 001）, NDS/CP（P%0.01）, and negatively related to the content of ADF（P〈0. 001）, NDF（P〈0. 001）. The lag times of gas production were positively related to the content of ADF（P〈0.01）, NDF（P〈0.05）, and negatively related to the content of OM（P〈0.01）, NDS（P〈0.05）, NDS/CP（P〈0.05）, and these results showed the fermentation level of combined forages in vitro gas production were mainly affected by the proportion of non-structural carbohydrates and crude protein. When the forages are mixed, combination proportion of silage corn-straw and alfalfa hay by 25 ： 75, silage corn-straw and oats by 50 ： 50, alfalfa green hay and oat green hay by 50 ： 50 were relatively appropriate, and with the increase of fermentation time, associate effects quantity of each combinations showed a gradually decreasing trends.关键词
青海高原/体外产气法/反刍家畜/牦牛/粗饲料/组合效应Key words
Qinghai plateau/in vitro gas production technique/ruminants/yak/forages/associate effects分类
农业科技引用本文复制引用
崔占鸿,刘书杰,郝力壮,张晓卫,赵月平..体外产气法评价青海高原反刍家畜常用粗饲料组合效应[J].草业科学,2011,28(10):1894-1900,7.基金项目
青海省科技厅基础研究项目“青海高原反刍家畜饲草料组合效应的评价研究（2009-Z-701）”致谢：诚挚感谢硕士生张胜权和刁波在体外培养试验过程中给予的工作协助. （）
