Comprehensive Evaluation Of Adaptability And Production Performance Of 10 Alfalfa Varieties Introduced In Northern Xinjiang

the production performance and nutritional quality of 10 alfalfa varieties(ТашкентNo.1,Ташкент No.20 09,Казакстан No.1,жайла,Дархан No.90,WL 168 HQ,WL 363 HQ,WL 354 HQ,WL 343 HQ)at home and abroad were determined and analyzed,and the dynamic change and difference of production performance and nutritional quality among 10 varieties in different cropping times or years were clarified by using the method of subordinate function analysis.The excellent varieties suitable for introduction and popularization in Fukang City were screened in order to suit the arid and semi-arid climate zones of Xinjiang.The introduction of high-quality and high-yielding varieties for planting and popularization and the selection of good varieties provide excellent materials and scientific data.The main results are as follows:(1)The wintering rate of 10 varieties ranged from 95.0%to 97.0%,and all of them could survive in Fukang City,Xinjiang,especially in Ташкент No.1,Ташкент No.2009,WL363HQ and WLHQ.The growth rate ranged from 1.97 cm·d-1～2.63 cm·d-1.The order of growth rate from big to small is:Central Asia(2.61 cm·d-1)>Local(2.28 cm·d-1)>United States(2.16 cm·d-1).The average stems:leaves ratio of the introduced varieties from the United States were 27.3%and 21.0%higher than those from Central Asia and the local areas respectively(P<0.05),but the varieties from Central Asia had relatively high plant height and branch number.(2)The average annual grass yield of 10 varieties ranged from 1 1049.9 to 16 467.5 kg·hm-2.Except for WL363HQ varieties,the average annual grass yield of the other varieties was higher than that of the local varieties(11677.2kg·hm-2),especially Ташкент No.1 andТашкент No.2009.There was a close linear positive correlation between alfalfa yield and plant height,number of branches and growth rate.(3)The crude protein content of 10 varieties ranged from 16.9%to 20.3%.The average crude protein content of American varieties were 11.5%and 10.5%higher than that of Central Asian and local varieties,respectively(P<0.05).The content of neutral detergent fibers ranged from 34.27%to 42.83%.Among them,the content of neutral detergent fiber ofКазакстан No.1,Ташкент No.1 and Ташкент No.2009 were relatively high,but the WL168HQ and WL363HQ were relatively low.The content of acid detergent fiber ranges from 30.3%to 36.2%,and the жайла and Казакстан No.l were high,while the WL363HQ and WL354HQ from American were relatively low.(4)According to the comprehensive evaluation of production performance and nutritional quality,the membership function values of Ташкент No.2009 and WL168HQ were the higher,and the comprehensive evaluation of WL363HQ and WL354HQ were the lower,so they were not suitable for introduction in this area.