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

摘要/Abstract

摘要： 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72 h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72 h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。

Abstract: In order to investigate nutrient contents, and dry matter (DM) and crude protein (CP) degradation properties of different Bothriochloa ischaemum populations at heading stage in Shanxi, fifteen Dorper×local breed F₁ male mutton hybrid sheep fitted with permanent rumen fistulas were selected to estimate degradability of DM and CP in the rumen. Findings included: the B. ischaemum populations differed greatly in nutrient content at the heading stage. A population from Taigu had the highest CP content and the lowest neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents, followed by populations from Yuanping and Qinyuan. The rumen degradability for DM and CP of different B. ischaemum populations also differed. The DM degradability of Taigu and Yuanping populations was significantly higher than that of the Xiangfen population at 72 hours (P<0.05). The DM effective degradability of the Taigu population was highest, with a value of 46.39%, followed by Yuanping and Qinyuan populations. Similarly, the CP degradability of the Taigu and Yuanping populations was significantly higher than the Ruicheng population which had the lowest CP degradability at 72 hours (P<0.05). The CP effective degradability of the Taigu population was highest, followed by the Fangshan and Yanggao populations, while there was no significant difference among three other populations (P>0.05). In conclusion, the degradability of DM and CP of the Taigu B. ischaemum population, as tested in rumen fistulated sheep, was the highest, among the tested populations.

姬奇武,韩汝旦,董宽虎,马雪豪. 山西不同居群白羊草的营养成分及瘤胃降解规律[J]. 草业学报, 2015, 24(9): 53-62.

JI Qi-Wu, HAN Ru-Dan, DONG Kuan-Hu, MA Xue-Hao. Nutrient components and rumen degradability dynamics of different Bothriochloa ischaemum populations in Shanxi[J]. Acta Prataculturae Sinica, 2015, 24(9): 53-62.

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