不同甜高粱品种（系）萌发期耐盐性研究

对94份甜高粱种质资源在发芽期进行耐盐性鉴定。结果表明，随着盐浓度的升高，发芽率呈现出下降趋势。不同品种（系）间的耐盐能力存在明显差异，按盐害百分率分级，1级品种（相对盐害率〈20％）5份，3级品种（相对盐害率20％-40％）17份，5级品种（相对盐害率40％-60％）36份，7级品种（相对盐害率60％～80％）15份，9级品种（相对盐害率≥80％）21份。其中芽期耐盐性强（耐盐级别3级以上）的高粱品种22份，占供试材料的23．40％。

Study on Salt Tolerance of Different Sweet Sorghum Cultivars at Germination Stage

Seed germination of 94 sweet sorghum cultivars were investigated through simulating salt stress at different salinity levels.The results indicated that with the increasing of salinity,all materials showed a decrease to various extents in germination rate and germination potential.The salt tolerance of different cultivars was obviously different.The 94 sorghum varieties were classified based on relative salt-injury rate.Five of them were fallen into the first-level tolerance,while 17 into the third-level tolerance,36 into the fifth-level tolerance,15 into the seventh-level tolerance,and 21 into the ninth-level tolerance.There were 22 varieties with high salt tolerance,whose relative salt-injury rate was less than 40%.