摘要
为筛选出紫花苜蓿(Medicago sativa)最精准的评价指标和抗旱性较强的紫花苜蓿品种,本研究对来自不同国家的66个紫花苜蓿品种的无性系进行了温室干旱胁迫试验.通过测定株高、鲜重、干重、根长及叶片相对含水量,分析不同紫花苜蓿品种幼苗对干旱胁迫的敏感程度,结合抗旱系数、鲜重抗旱指数、综合抗旱系数以及隶属函数法综合评比其抗旱性.结果表明:株高、鲜重、干重、根长及叶片相对含水量可作为干旱条件下紫花苜蓿抗旱性评价指标.综合比较筛选出'Dryland'比佛'陇东'杂20'及'巨能7'为抗旱性强的紫花苜蓿品种,适宜在干旱地区推广种植.
Abstract
To identify the most accurate index for evaluating drought resistance in alfalfa and to select for drought tolerance in alfalfa, 66 alfalfa varieties from clones of diverse geographical origins were used in drought stress experiments in a greenhouse in this study. The sensitivity of different alfalfa varieties to drought stress was analyzed by measuring plant height, fresh weight, dry weight, root length, and leaf relative water content. Drought resistance was comprehensively evaluated using the drought resistance coefficient, fresh weight drought resistance index, comprehensive drought resistance coefficient, and the membership function approach. The results indicated that plant height, fresh weight, dry weight, root length, and leaf relative water content were viable metrics for assessing the drought resistance of alfalfa under water-deficit conditions. Through a comprehensive comparison, cultivars such as 'Dryland' 'Permanent 101' 'Befo' 'Ondaka'Lanrelaiende', and 'Keshanshaertu' were selected as drought-tolerant alfalfa cultivars, rendering them suitable for cultivation in arid regions.
基金项目
宁夏回族自治区自然科学基金(2022AAC03088)
维普
万方数据