4种多年生禾草苗期抗旱性的比较研究  

Comparison about Drought Tolerance of Four Perennial Forages During Seedling

作　　者：李雪莲[1] 张国芳[2] 谷艳蓉[2] 孟林[2] 

机构地区：[1]新疆农业大学草业工程学院,新疆乌鲁木齐830052 [2]北京市农林科学院草业与环境研究发展中心,北京100089

出　　处：《四川草原》2005年第1期13-15,共3页Journal of Sichuan Grassland

基　　金：北京市科技合同项目(H020720010630)北京市农业局项目

摘　　要：采用盆栽育苗法,在4种多年生禾本科牧草苗期连续干旱胁迫下测定植株的叶片相对含水量、质膜相对透 性、游离脯氨酸含量、丙二醛含量4个抗旱生理指标,以综合评价4种多年生禾草的抗旱性能。研究结果表明:供试材料 在连续干旱胁迫下,叶片相对含水量呈下降趋势,质膜相对透性、游离脯氨酸含量及丙二醛含量都有所增加。综合分析 结果,4种多年生禾草的苗期抗旱性按照从强到弱的顺序依次为无芒雀麦>苇状羊茅≥老芒麦>披碱草。Through Cultivating four perennial forages (Bromus inermis, Festuca arundinacea, Elymus sibiricus, and Elymus dahuricus) in basin, their physiological indexes, including the relative moisture of leaves, the relative penetration of membrane, Pro content and MDA content, were comprehensively evaluated to compare their drought tolerance. The results showed, under the stress of continuous drought, the relative moisture of leaves had a descending trend, while the relative penetration of membrane, Pro content and MDA content all slightly increased. And their sequence of drought tolerance during seedling was Bromus inermis>Festuca arundinacea≥Elymus sibiricus>Elymus dahuricus.

关 键 词：牧草 苗期 抗旱性 评价 

分 类 号：S543[农业科学—作物学]