山西不同居群白羊草营养品质动态比较

以山西9个不同居群的白羊草（Bothriochloa ischaemum）为研究对象，采用常规分析方法对其营养价值进行评价，探究营养品质随生育期的动态变化，结果表明，随生育期的不断推进，山西9个白羊草居群的粗蛋白（CP）、粗脂肪（EE）含量逐渐降低，而中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和酸性洗涤木质素（ADL）含量呈相反的变化趋势。同一生育期内，不同居群的CP、EE、NDF、ADF和ADL含量均差异显著（P0.05）。拔节期，襄汾居群的CP、EE含量最高， NDF、ADF和ADL含量最低，具有最高的营养价值；孕穗期，沁源居群的CP和EE含量最高，营养价值最高，太谷居群次之；抽穗、开花和成熟期的营养成分含量综合表现以太谷居群最好，其次是沁源和原平居群。

The dynamics comparisons of nutritional quality of different Bothriochloa ischaemum populations in Shanxi

In the present study, the nutritional values of nine Bothriochloa ischaemum populations from Shanxi were evaluated by conventional methods to explore the dynamics changes of nutritional quality during growth stage. The results showed that the contents of crude protein(CP), EE declined with plants growth and development, whereas the contents of NDF, ADF and ADL increased. In the same growth stage, there were significant differences (P0.05) in the contents of CP, EE, NDF, ADF and ADL among the different populations. In the jointing stage, plants of Xiangfen population had the highest contents of CP, EE and the lowest contents of NDF, ADF and ADL indicating its highest nutritional value at this stage. In the booting stage, plants of Qinyuan population had the highest contents of CP, EE suggesting its the highest nutritional value at this stage. In the heading, flowering and mature stage, the comprehensive performance of nutritional contents of plants from Taigu population was best, followed by the Qinyuan and Yuanping populations.