The effect of different doses of Astragalus root extract on in vitro rumen fermentation of steamflaked maize grains used as an only substrate
An in vitro study was conducted to determine the effect of different doses of Astragalus root extract (ARE, Huangqi) on rumen fermentation of steam-flaked maize grains. Rumen fluid was taken from 3 crossbred steers fed a 55％ forage to 45％ mixed concentrate ratio diet. As ARE dose was increased, ruminal ammonia-N concentration was decreased in a dose dependent manner, whereas total volatile fatty acid concentration and total gas production were increased linearly (P＜0.001). Increasing ARE doses resulted in decreased molar proportion of acetate and increased molar proportion of propionate as well as a decrease in acetate: propionate ratio. In conclusion, ARE could stimulate the mixed ruminal fermentation as well as modify the pattern of rumen fermentation in vitro.
plant extract rumen fermentation in vitro gas production
D.J.Deng J.Wang L.P.Ren Z.M.Zhou Q.X.Meng
State Key Laboratory of Animal Nutrition and College of Animal Science and Technology,China Agricult Jiangsu Poultry Institute, Chinese Academy of Agricultural Sciences Yangzhou, Jiangsu 225261, P.R.Ch
国际会议
The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)
北京
英文
672-677
2007-09-16（万方平台首次上网日期，不代表论文的发表时间）