六份乡土牧草苗期干旱胁迫的对比研究  

Comparative study on drought resistance of six native Elymus L.species seedlings

作　　者：陈有军[1] 周青平[1] 孙建[2] 田莉华[1] CHEN You-jun ZHOU Qing-ping SUN Jian TIAN Li-hua(Institute of Qinghai-Tibetan Plateau, Southwest University for Nationalities, Chengdu,610041, P. R. C. Synthesis Research Centre of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modelling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 ,P. R. C.)

机构地区：[1]西南民族大学青藏高原研究院,四川成都610041 [2]中国科学院地理科学与资源研究所生态网络观测与模拟综合研究中心,北京1001012

出　　处：《西南民族大学学报（自然科学版）》2016年第6期598-603,共6页Journal of Southwest Minzu University(Natural Science Edition)

基　　金：中央高校青年基金(2016NZYQN31);四川省重点专项(2015SZ0062);国家支撑计划(2015BAC05B01)资助

摘　　要：研究不同乡土牧草材料的苗期植株的抗旱性差异,对筛选干旱区高抗性乡土牧草资源具有重要意义.以6份乡土披碱草属(Elymus L.)牧草的苗期植株为研究材料,进行连续干旱胁迫试验,并测定第0 d、5 d、10 d的脯氨酸、丙二醛(MDA)、叶绿素含量及细胞膜透性,最后运用隶属函数法进行抗旱性综合评价.结果表明,随着干旱的持续,6份实验材料叶绿素的含量显著性降低(P<0.05);丙二醛、脯氨酸、细胞膜含量或透性呈显著性增加趋势(P<0.05).综合评定抗旱性强弱的顺序为:圆柱披碱草>老芒麦>垂穗披碱草>麦宾草>披碱草>短芒老芒麦.Study on the drought resistance of different local forage species＇ seedling is vital for selecting high-resistance forage species in drought regions. In this study, six kinds of native Elymus L. species seedlings were used for continuous drought resist- ance experiment, and the cell membrane permeability, malondialdehyde （MDA） , proline, and chlorophyll contents were deter- mined after 0 d,5 d, 10 d drought stress. The method of generalized membership function in Fuzzy mathematics was applied to compare drought resistance of 6 species. The results showed that the chlorophyll content of all the six tested species was de- creased significantly with the duration of drought stress respectivly, （ P 〈 0. 05 ）. However, the cell membrane permeability, pro- line, and MDA contents of all the six tested species were increased significantly （P 〈 O. 05 ）. The final comprehensive evaluation of the drought resistance of the six tested species was ranked as follows ： Elymus dahuricus 〉 Elymus sibiricus Linn 〉 Elymus nu- tans Griseb. 〉 Elymus tangutorum （Nevski） Hand. -Mazz 〉 Elymus dahuricus Turcz. 〉 Elymus dahuricus.

关 键 词：乡土牧草 披碱草属牧草 干旱胁迫 抗旱性 

分 类 号：S54[农业科学—作物学]