【摘要】 在底物粗蛋白质和粗脂肪水平相同的条件下,研究非纤维性碳水化合物(NFC)水平(20%、40%、60%和80%)对活体外瘤胃发酵24h后的发酵参数和发酵液中共轭亚油酸(CLA)浓度的影响。结果表明:底物不同的NFC水平影响活体外瘤胃发酵和CLA的产生。随底物NFC水平的提高,瘤胃微生物的活体外发酵程度提高;同时发酵液中CLA的浓度随底物NFC水平的提高呈线性增加(L,P<0.0001)的变化趋势。更多还原

【Abstract】 An in vitro study was conducted to determine the effect of different levels (20%, 40%, 60% and 80%) of dietary nonfiber carbohydrate (NFC) on rumen fermentation and production of conjugated linoleic acids (CLA) by mixed ruminal microorganisms. The four substrates contained same level of CP and ether extract. After 24 h of incubation, rumen fermentation parameters and the concentration of fatty acids in the culture fluid were determined. Results showed that the substrate NFC level influenced rumen fermentation traits and the information of CLA. As substrate NFC level increased, the fermentation extent of microorganisms was increased, and the concentration of CLA in the fermentation fluid was increased in a linear manner (L, P < 0.0001).更多还原