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《Acta Agrestia Sinica》 2010-02
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Evaluation of Salt Tolerance of 16 Introduced Varieties of Italian Ryegrass at Seedling Stage

XU Neng-xiang1,GU Hong-ru1,FENG Bo-qing2,ZHANG Xia1,CHENGYun-hui,DING Cheng-long1(1.Institute of Animal Science,Jiangsu Academy of Agricultural Sciences,Nanjing,Jiangsu Province 210014,China; 2.Jurong Agricultural Bureau,Jurong,Jiangsu Province 212400,China)  
Salt tolerance indicators of Italian ryegrass(Lolium multiflourum Lam.) at seedling stage were integrated evaluated in order to identify and utilize the suitable germplasm for alkaline soil.Under salt stress at 0% and 0.2% NaCl,the botanical,physiological,and biochemical indicators of Italian ryegrass were determined and analyzed for salt tolerance comparison.The results show that the average plant height,root length,and underground biomass of 16 varieties at 0.2% NaCl were significantly lesser than those at 0% NaCl(P0.05),the average aboveground biomass was lower than that at 0% NaCl,and the average tiller no.per plant was slightly more than that at 0% NaCl without significant difference.Soluble sugar contents of 7 varieties at 0.2% NaCl were significantly lower than those at 0% NaCl and relative electrical conductivity rate of 11 varieties were significantly higher than those at 0% NaCl(P0.05).According to the clustering analysis based on the botanical,physiological,and biochemical indicators,the tested 16 varieties were divided into three groups as 8 varieties were relatively salt tolerant,4 varieties moderately salt tolerant,and 4 varieties relatively susceptive to salt stress.
【Fund】: 国家科技支撑计划资助(2008BADB3B10);; 江苏省科技支撑计划(BE2009306)资助
【CateGory Index】: S543.6
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