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草业学报  2015 

山西不同居群白羊草的营养成分及瘤胃降解规律

DOI: 10.11686/cyxb2014407, PP. 53-62

Keywords: 白羊草,抽穗期,瘤胃降解,干物质,粗蛋白

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Abstract:

为研究山西不同居群白羊草抽穗期的营养成分含量及干物质(DM)和粗蛋白质(CP)在绵羊瘤胃中的降解规律,以安装永久性瘘管的杜泊与本地羊杂交一代肉用绵公羊15只为试验动物,采用尼龙袋法对不同居群白羊草抽穗期的DM和CP的降解率及降解参数进行测定。结果表明,居群对白羊草的常规营养成分含量有较大的影响。其中,太谷居群具有最高的粗蛋白质(CP)含量和最低的中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量,其次是原平和沁源居群。不同居群白羊草的DM和CP的降解特性不同,其中,太谷和原平居群72h的DM降解率最高,显著高于襄汾居群(P<0.05),太谷居群的DM有效降解率最高,达到46.39%,其次是原平和沁源居群;太谷和原平居群72h同样有最高的CP降解率,显著高于降解率最低的芮城居群(P<0.05)。太谷居群的CP有效降解率最高,其次是方山和阳高居群,三者差异不显著(P>0.05)。由此可见,太谷居群DM和CP降解率最高,优于其他居群。

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