The effect of different doses of Astragalus root extract on in vitro rumen fermentation of steam-flaked maize grains used as an only substrate
文献类型: 外文期刊
第一作者: Deng, D. J.
作者: Deng, D. J.;Ren, L. P.;Zhou, Z. M.;Meng, Q. X.;Deng, D. J.;Ren, L. P.;Zhou, Z. M.;Meng, Q. X.;Wang, J.
作者机构:
关键词: plant extract;rumen fermentation;in vitro gas production
期刊名称:JOURNAL OF ANIMAL AND FEED SCIENCES ( 影响因子:1.525; 五年影响因子:1.625 )
ISSN: 1230-1388
年卷期: 2007 年 16 卷
页码:
收录情况: SCI
摘要: 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.
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