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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 β-carotene on selected indices of in vitro rumen fermentation in goats
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Effect of β-carotene on selected indices of in vitro rumen fermentation in goats

机译：β-胡萝卜素对山羊体外瘤胃发酵选择指标的影响

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摘要

Three goats fitted with rumen fistula were used as donors of rumen fluid. Substrates were incubated in vitro with buffered rumen fluid for 24 h. Different levels of P-carotene (five groups: 10, 50,100,200, 500 mg/1) were added as five treatment groups to determine whether it affected rumen fermentation in vitro as compared with blank samples used as controls. NH3-N concentrations with 50,100 and 200 mg β-carotene/1 group were found significantly lower than that in blank samples (P＜0.01). Microbial protein concentrations in all β-carotene-added groups were higher than in blanks, while those found in 200 and 500 mg/1 groups were significantly higher (P＜0.05 and 0.01, respectively). Total VFAs seemed not to be affected by added β-carotene (P＞0.05), although propionate and butyrate concentrations changed. It is concluded that β-carotene can enhance the utilization of NH3-N by rumen microorganisms and thus promote their growth in vitro.
机译：将三只装有瘤胃瘘的山羊用作瘤胃液的供体。将底物与瘤胃缓冲液体外孵育24小时。作为五个处理组，添加了不同水平的P-胡萝卜素（5组：10、50、100、200、500 mg / 1），以确定与空白对照组相比，其在体外是否影响瘤胃发酵。发现50,100和200 mgβ-胡萝卜素/ 1组的NH3-N浓度显着低于空白样品（P ＜0.01）。所有添加β-胡萝卜素的组中的微生物蛋白浓度均高于空白对照组，而在200 mg和500 mg / 1组中的微生物蛋白浓度显着更高（分别为P ＜0.05和0.01）。尽管丙酸酯和丁酸酯的浓度发生了变化，但总的VFA似乎不受添加的β-胡萝卜素的影响（P＞ 0.05）。结论：β-胡萝卜素可以提高瘤胃微生物对NH3-N的利用，从而促进其体外生长。

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