【摘要】 为研究苜蓿（Medicago sativa）种子在碱性盐Na₂CO₃胁迫下的发芽特性和耐盐性强弱,以10个苜蓿品种为材料,研究不同浓度Na₂CO₃（0、0.1%、0.15%、0.2%、0.3%）处理对苜蓿种子发芽势、发芽率、胚根长和胚芽长的影响。结果表明:不同苜蓿品种之间的耐盐碱性差异明显;随着Na₂CO₃胁迫浓度的提高,苜蓿种子的发芽率呈先增大后降低的趋势;发芽势、胚根长和胚芽长均随盐浓度的增加而降低;不同苜蓿品种各指标的耐盐系数大小不同;根据隶属函数值对供试苜蓿品种耐Na₂CO₃性由强到弱进行排序:中苜1号>巨能>YL702>皇冠>中草3号>龙牧801>YL80>驯鹿>YL604>阿尔冈金。更多还原

【Abstract】 To clarify the seed germination characteristics of alfalfa under Na₂CO₃ stress,10 alfalfa varieties were utilized in the present study,and the effects of different concentrations of Na₂CO₃（0,0.1%,0.15%,0.2%,and 0.3%）on the main seed germination characteristics,including germination rate,germination energy,hypocotyl length,and radicle length were measured.The results showed that the salt tolerance of different alfalfa varieties had obvious differences.By increasing Na₂CO₃ concentration,the germination rate first increased and then decreased,the germination energy was reduced,the plumule length and radicle length were shortened,and the salt tolerance indexes of the different alfalfa varieties were dissimilar.The synthetic analysis of four parameters indicated that the order of Na₂CO₃ salt resistance was Zhongmu No.1> Giant> YL702>Phabulous> Zhongcao No.3> Longmu 801 > YL80 > AC Caribou > YL604 > Algonquin.更多还原