【摘要】 试验通过活体外产气量方法,研究了不同饱和度的脂肪酸对β-胡萝卜素瘤胃降解率的影响。结果表明:体外发酵0.5￣2h,对照组β-胡萝卜素瘤胃降解率均显著高于处理组(P<0.05),而处理组间无显著差异(P>0.05)。体外发酵4h开始,对照组瘤胃内β-胡萝卜素降解率均显著低于处理组(P<0.01),而处理组间无显著差异(P>0.05)。油脂的饱和度对β-胡萝卜素瘤胃液内的降解率没有影响,但油脂添加使发酵初期β-胡萝卜素的降解速度变慢,而发酵2h后降解率迅速升高。更多还原

【Abstract】 Using an in vitro gas production method, the Expt was designed to determine the effect of different saturated fat on rumen degradability of β-carotene. The result showed that the degradability of β-carotene in control group is significantly higher than treatment groups(P < 0.05)from 0.5 h to 2 h culture in vitro, and there is no difference between treatment groups(P > 0.05). After fermenting for 4 h, the degradability of β-carotene in control group was significantly lower thanthose of treatment groups(P < 0.01), however, there was no difference between treatment groups(P > 0.05). It was concluded that the addition of fat itself per se, rather than its saturation, restarted the rumen degradability of β-carotene in vitro during the first 2 h of fermentation, but increased the degradability after 2 h of incubation.更多还原