内蒙古干旱草原区紫花苜蓿引种评价

Evaluation on the introduced alfalfa cultivars for the steppe area in Inner Mongolia

对内蒙古干旱草原区引进的21个紫花苜蓿品种进行生态引种试验,并对生长及遗传性状进行测试分析,越冬率测定表明,国内4个紫花苜蓿品种越冬率均在80%以上,国外引进紫花苜蓿品种越冬率在80%以上只有4个,分别来自于美国和加拿大,从澳大利亚引进的4个品种均不能越冬。按越冬率为标准将21个品种聚类为4组,分析组间形态特征差异,结果表明花色、叶片长、株丛高度、生长习性4个特征在组间差异显著。然后对产量和营养价值分析,筛选出适宜该地区种植的国内外紫花苜蓿品种,以丰富该地区紫花苜蓿品种资源,同时为苜蓿抗寒及耐牧根蘖型苜蓿新品种培育提供研究基础。

The evaluation of adaptability of 21 introduced alfalfa cultivars was carried out in steppe area of Huangqi County in Inner Mongolia from 2000 to 2004. Field trail results showed that the over-winter rate of 4 domestic cultivars were over 80 %, while 4 cultivars from Australia were under 10%. 21 cultivars were clustered into 4 groups based on over-winter rate. Morphological traits of flower color, canopy height, leaf length and growth showed the significant differences among 4 groups. Forage yield and nutritive value of 4 domestic eultivars and 4 introduced eultivars （Travois,Teton, Algonquin and Ladak）were higher and could be extended in this area.