Abstract: [Objective] To screen alfalfa individual plants with superior traits and enrich the germplasm resources of high quality alfalfa in Xing’an League, Inner Mongolia. [Methods] A comprehensive evaluation was performed on 20 alfalfa individual plant materials by measuring seven agronomic traits （plant height, stem diameter, branch number, leaf length, fresh weight, dry weight and dry-to-fresh ratio） and six nutritional quality indicators （crude protein, crude fat, neutral detergent fiber, acid detergent fiber, crude ash and relative feeding value）. The comprehensive performance was systematically evaluated by membership function method. [Results] After analysis by membership function method, the best individual plant was XM-9, whose fresh weight was 160 g/plant, dry weight was 62.61 g/plant and dry-to-fresh ratio was 0.39. Its crude fat content was 8.19%, neutral detergent fiber content was 47.91%, acid detergent fiber content was 37.74%, crude protein content was 20.42%, crude ash content was 2%, relative feeding value was 115.70. Among the 20 alfalfa individual plants, the top five individual plants were XM-9, XM-3, XM-1, XM-5 and XM-15. [Conclusion] XM-9 individual plant exhibited excellent production performance and nutritional quality, and could be used as the core parental material for the construction of local high-quality alfalfa asexual family and the breeding of new alfalfa varieties, which provided an important material basis for germplasm innovation of alfalfa in Xing’an League.

Key words: alfalfa individual plant, agronomic traits, nutritional quality, membership function, Xing’an League;