通过对不同紫花苜蓿品种的产量及其构成要素、品质和越冬性进行研究，运用聚类分析法筛选出河西走廊沙地的适种紫花苜蓿品种。结果表明，15个参试品种中，干物质折合产量标靶明显高于其余14个品种(P＜0.05)，株高以BR4010和阿尔冈金最高，一级分枝数以亮苜2号最多，叶茎比康赛明显高于其余14个品种，越冬性以岩石最好，不同紫花苜蓿品种间地上干物质产量、株高、叶茎比、分枝数和越冬性差异较大。以株高、叶茎比、分枝数、产量和越冬率为因子，将15个品种聚为5个类群，综合结果显示，BR4010、阿尔冈金、阿迪娜，亮苜2号和WL363HQ等5个品种所在的类群综合适应性较好，适宜在河西走廊沙地种植。

A field study is conducted to study the different varieties of alfalfa yield and its constituent elements， quality and overwinter performance， and assessing the suitable of 15 lucerne (Medicago sativa) varieties， to select suitable lucerne varieties for sowing grasses in Hexi corridor. The result shows that above biomass， below biomass， and proline acid content of leaves are greatly different between lucerne varieties. The yield of Target is significantly higher than that of other 14 varieties. Plants height of BR4010 and Aergangjin is significantly greater than those of other 13 varieties. Leaf-stem ratio of Kangsai is significantly greater than those of other 14 varieties， but Liangmu 2 has the highest branches. And the Yanshi have the highest winter， illustrated by a character evaluation of 15 varieties in Hexi Corridor， adaptability， you get a different result. Therefore， the plant height， leaf stem ratio， number of branches， yield and winter hardiness of 5 indicators， to test 15 species by cluster analysis. It is suggested that BR4010、Aergangjin、Adina、Liangmu 2 and WL363HQ are suitable for sowing grasses in Hexi corridor.

S963.223. 5

甘肃省科技重大专项项目(2013GS05907)部分内容