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首页> 外文会议>International Symposium on the Nutrition of Herbivores(ISNH-7); 20070917-22; Beijing(CN) >Effect of immature oak (Quercus pyrenaica) leaves intake on ruminal fermentation and adaptation of rumen microorganisms in cattle
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Effect of immature oak (Quercus pyrenaica) leaves intake on ruminal fermentation and adaptation of rumen microorganisms in cattle

机译：采食未成熟橡树栎（Quercus pyrenaica）对牛瘤胃发酵和瘤胃微生物适应性的影响

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摘要

Two experiments were conducted to study the effect of the consumption of different amounts of immature Pyrenean oak leaves (OL) by beef cattle on in vitro ruminal fermentation and potential adaptation of rumen microorganisms. A total of twelve ruminally cannulated young Brown Swiss bulls were divided in experimental groups that received different amounts of OL via the ruminal cannula (on average 0, 2.5, 5.2 and almost 10 kg fresh matter per animal and day). The gas production technique was used to study in vitro fermentation of two substrates (grass hay and OL) incubated with rumen inocula derived from each bull. Results suggest not only a dose-dependent negative effect of tannins consumption on ruminal fermentation of common feeds (e.g., grass hay), but also an adaptation of rumen microbial populations from animals receiving moderate amounts of OL. The high level of tannins in the rumen of bulls that received the highest amount of OL would have exceeded the ability of microorganisms to tolerate or detoxify them.
机译：进行了两个实验，以研究肉牛消耗不同数量的未成熟比利牛斯橡树叶（OL）对体外瘤胃发酵和瘤胃微生物潜在适应性的影响。总共十二只瘤胃插管的幼小布朗瑞士公牛被分成实验组，这些实验组通过瘤胃插管接受不同量的OL（每只动物每天平均摄取0、2.5、5.2和近10千克新鲜物质）。产气技术用于研究两种底物（草干草和OL）的体外发酵，这些底物与源自每头公牛的瘤胃接种物一起孵育。结果表明，不仅单宁消耗量对普通饲料（例如草干草）的瘤胃发酵有剂量依赖性的负面影响，而且还表明了适量的OL对动物瘤胃微生物种群的适应作用。在牛瘤胃中获得最高量的OL的高水平丹宁酸已经超出了微生物对其耐受或解毒的能力。

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