UNASSIGNED: A total of 28 articles were collected from various scientific databases, such as Scopus, Science Direct and Google Scholar, and the data were analysed using a random effects model and meta-regression for rumen BH. The publication bias on the main variables of rumen fermentation was assessed using a funnel plot and Egger\'s test.
UNASSIGNED: An increase in tannin levels significantly reduced methane production (p < 0.001) and the population of Butyrivibrio fibrisolvens (p < 0.05). Dietary tannins also decreased the SFA proportion (p < 0.001) and increased (p < 0.001) the rumen monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) proportions. In additions, there were negative relationships between dietary tannin levels and BH rates of C18:2 n-6 and C18:3 n-3 (p < 0.05).
UNASSIGNED: Dietary tannins modulate the rumen fermentation profile, mitigate methane emissions, and inhibit rumen BH of PUFA.
■总共从各种科学数据库中收集了28篇文章,比如Scopus,科学直接和谷歌学者,并使用随机效应模型和瘤胃BH的荟萃回归分析数据。使用漏斗图和Egger检验评估了瘤胃发酵主要变量的发表偏倚。
■单宁水平的增加显着降低了甲烷的产生(p<0.001)和丁威弧菌的数量(p<0.05)。日粮单宁还降低了SFA的比例(p<0.001),并增加了瘤胃单不饱和脂肪酸(MUFA)和多不饱和脂肪酸(PUFA)的比例(p<0.001)。Inadditions,膳食单宁水平与C18:2n-6和C18:3n-3的BH率呈负相关(p<0.05)。
■膳食单宁调节瘤胃发酵曲线,减少甲烷排放,并抑制PUFA的瘤胃BH。