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用紫花苜蓿Ｓａｒａｎａｃ、Ｔｈｏｒ、Ｅｕｒｏｐｅ、Ｖｅｒｔａｓ及杂种苜蓿Ｉｒｏｑｕｏｉｓ、Ａｌｇｏｎｑｕｉｎ与国产关中苜蓿、新疆大叶苜蓿及公农２号苜蓿品种进行了生产性能比较试验。结果表明，在黄土高原低平地带，正常年份牧草产量各品种间没有显著差异（Ｐ＞０．０５），但在多雨年份，７、８月形成湿热气候，造成所试品种减产，而公农２号苜蓿对湿热气候的耐力远胜过其他品种。国产３个品种春季返青都较引入品种早，生长速度以引入的Ｅｕｒｏｐｅ最快。国产的３个品种，在长日照下的头茬草生长速度较Ｅｕｒｏｐｅ之外的其余品种为快，但在短日照下的末茬草关中苜蓿和公农２号苜蓿较其他品种生长缓慢。
The comparison of production performance between alfalfa Saranac, Thor, Europe, Vertas and hybrid alfalfa Iroquois, Algonquin and domestic Guanzhong alfalfa, Xinjiang big leaf alfalfa and Gongnong 2 alfalfa varieties were carried out. The results showed that there was no significant difference (P> 0.05) in pasture grass production in the lowlands of the Loess Plateau during the normal years, but in wet years, the hot and humid climate was formed in July and August, No. 2 alfalfa on wet and hot weather endurance far better than other varieties. The three domestic cultivars returned to green in spring than the introduced varieties, and the growth rate was the fastest in Europe. The first three domestic cultivars grew faster under the long sunshine than the rest of the cultivars, but under the short daylight, alfalfa and Gongnong No.2 alfalfa grew more slowly than the other cultivars.