关键词: 风沙半干旱地区, 紫花苜蓿, 生产性能

Abstract: In order to select the suitable alfalfa varieties for the sandy and semi-drought areas of northwest Liaoning province,the production performances of thirty alfalfa varieties were evaluated by this study with a randomized block design.The results show that there were significant differences in the reviving stage and the most discrepancy reached to twenty-two days.Gannong No.3 was the earliest one,Gongnong No.1,Aohan and Gannong No.1 followed,a majority of domestic varieties revived earlier than introduced varieties.Most domestic varieties were better than introduced varieties in cold resistance and had higher overwinter rates.Among the five selected factors,the ramification number and overwinter rate determined the alfalfa fresh and dry forage yield;moreover,the branch number per stem also had a greater influence on the dry forage production.According to the integrated appraise on the production performance of tested varieties,Gongnong No.1,Baofeng,Gannong No.3,Longdong,Defu,Phabulous,and Affinity were optimum for the extended planting in this area due to their relatively better branching capability and higher plant height.

Key words: Sandy and semi-drought area, Alfalfa, Productive characteristics