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首页> 外文期刊>Animal Science Journal >Effect of changing forage on the dynamic variation in rumen fermentation in sheep
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Effect of changing forage on the dynamic variation in rumen fermentation in sheep

机译：改变饲料对绵羊瘤胃发酵动态变异的影响

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摘要

To better understand rumen adaptation during dietary transitions between high- and low-quality forages, 10 rumen-cannulated Hu sheep were randomly allocated to two dietary treatments (five sheep each) with the same concentrate-to-forage ratio and concentration mixture, but different forage sequences: (i) alfalfa hay (AH) to corn stover (CS) and back to AH; and (ii) CS to AH and back to CS. A significant decrease in the rumen microbial protein concentration was observed on day 6 after dietary transition whether the transition was from AH to CS or from CS to AH, and this was accompanied by an increase in the ammonia nitrogen concentration as well as a decrease in the total volatile fatty acids concentration and pH. However, after transitioning back to the original forage, the rumen fermentation parameters returned to their initial levels within 2weeks. Our findings suggest that abrupt substitutions of forages with large nutrient differences could influence rumen function to some extent, but recovery can occur within 2weeks without detrimental effects. Furthermore, we speculate that the variation of fermentation in the first 6days may indicate an important rumen transition stage that requires further study.
机译：为了更好地了解在高质量和低质量的饲料之间的膳食过渡期间，将10个瘤胃包裹式的HU绵羊随机分配给两种膳食处理（每次绵羊，每次），具有相同的浓缩料比和浓度混合物，但不同饲料序列：（i）苜蓿干草（α）至玉米秸秆（CS）并回到啊; （ii）CS至啊，回到CS。在膳食过渡后第6天观察瘤胃微生物蛋白浓度的显着降低，转变是否从Ah到Cs或Cs至α，这伴随着氨氮浓度的增加以及减少总挥发性脂肪酸浓度和pH。然而，在过渡到原始牧草后，瘤胃发酵参数返回到2周内的初始水平。我们的研究结果表明，具有大营养差异的突发替换可能会在一定程度上影响瘤胃功能，但恢复可能发生在2周内没有不利影响。此外，我们推测了前6天的发酵的变异可能表明需要进一步研究的重要瘤胃过渡阶段。

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