摘要
为了解不同老芒麦(Elymus sibiricus L.)品系的耐盐性差异及培育耐盐老芒麦新品种,以老芒麦14个品系和1个审定品种的种子为试验材料,采用0.2%、0.4%、0.6%、0.8%、1.2%和1.5%共6个浓度的NaCl溶液浸种,进行了发芽率、发芽指数、活力指数、苗长、根长等指标测定。结果表明:1)随NaCl浓度增加,供试老芒麦材料的相对发芽率、发芽指数、活力指数、根长和苗长整体表现为下降趋势,但0.2%~0.4%浓度NaCl处理对部分品系相对发芽率和发芽指数有一定的激发效应。2)与一元直线模型、二次多项式模型相比,三次多项式模型能更好地反映老芒麦相对发芽率随NaCl浓度而变化的趋势。3)综合相对发芽率、发芽指数、活力指数、根长和苗长指标来看,14个品系中21号和9号品系的耐盐性优于当家品种农牧老芒麦,可在盐渍化程度偏高的地区推广种植。
Fourteen lines and one variety of Elymus sibiricus were used in this study to identify the salt tolerance characteristics of different lines,and in order to cultivate new variety with salt-tolerance,The seeds were soaked by different concentrations of NaCl solution(0.2%,0.4%,0.6%,0.8%,1.2%,1.5%)during their germination stage.The physiological indexes of relative germination rate,germination index,vigor index,length of seedling and length of root had been tested.The result detected that:1)With the increase of NaCl concentration,the relative germination rate,germination index,vigor index,root length and seedling length of E.sibiricus lines decreased,but the relative germination rate and germination index of some lines were induced by 0.2%-0.4%NaCl concentration.2)Compared with unary linear model and quadratic polynomial model,the cubic polynomial model could better reflect the trend of relative germination rate of E.sibiricus lines with NaCl concentration.3)Considering relative germination rate,germination index,vigor index,root length and seedling length,line of No.9 and No.21 have better salt resistance than Nongmu.They are more suitable for planting in areas with higher salinity.
作者
胡卉芳
崔乐乐
王娟
王照兰
杜建材
HU Huifang;CUI Lele;WANG Juan;WANG Zhaolan;DU Jiancai(Grassland Research Institute,Chinese Academy of Agricultural Sciences,Hohhot 010010;Mengshu Ecological Construction Group Co.Ltd.,Hohhot 011517,China)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2022年第11期119-126,共8页
Journal of Arid Land Resources and Environment
基金
退化沙化草地免耕补播生态修复技术示范(KJXM-EEDS-2020010-05)
内蒙古自治区科技计划(2020GG0063)
内蒙古和盛生态育林有限公司林业生态建设院士专家工作站建设项目(201803007)资助。
关键词
老芒麦
品系
盐胁迫
发芽特性
Elymus sibiricus L
lines
salt stress
germination traits