干旱区研究

干旱区研究 ›› 2012, Vol. 29 ›› Issue (3): 440-444.

• 生物资源 • 上一篇    下一篇

干旱胁迫下3种岩石边坡生态修复植物的抗旱性

 周江1,2, 裴宗平1,2, 胡佳佳3, 贾含帅2, 朱琳2   

    1. 江苏省资源环境信息工程重点实验室，江苏 徐州 221116；
    2. 中国矿业大学环境与测绘学院，江苏 徐州〓221116；
    3. 贵州省环境监测中心站，贵州 贵阳〓550002
  • 收稿日期:2011-11-27 修回日期:2012-02-13 出版日期:2012-05-15 发布日期:2012-05-30
  • 作者简介:周江（1985-），男，穿青族，贵州织金人，在读硕士生，主要从事矿山生态修复、环境规划与管理等研究. E-mail：zhoujiang2913@163.com
  • 基金资助:

    徐州市科技计划项目（XJ09085）;国家大学生创新性实验计划项目（091029026）

Research on Drought Resistance of Three Plant Species in Ecological Regeneration on Rocky Slope under Drought Stress

 ZHOU  Jiang1,2, PEI  Zong-Ping1,2, HU  Jia-Jia3, JIA  Han-Shuai2, ZHU  Lin2   

    1. Jiangsu Key Laboratory of Resources and Environmental Information Engineering, Xuzhou  221116, Jiangsu Province, China;
    2. College of Environmental and Spatial Informatics, China Mining University, Xuzhou  221116, Jiangsu Province, China;
    3. Guizhou Province Environmental Monitoring Center, Guiyang  550002, China
  • Received:2011-11-27 Revised:2012-02-13 Published:2012-05-15 Online:2012-05-30

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被引次数

25

摘要： 植物的抗旱性直接影响着岩石边坡生态修复的效果。为研究不同植物在持续干旱下的抗旱机理，选择草地早熟禾、狗牙根和红三叶3种常用于岩石边坡生态修复的植物，采用盆栽控水试验和室内分析相结合的方法，研究干旱胁迫下3种植物叶片的相对含水量、相对电导率、丙二醛（MDA）含量、可溶性糖含量、脯氨酸(Pro)含量和叶绿素含量6个生理生化指标的变化情况。结果表明：所有参试植物的生理生化指标都随干旱胁迫的程度而变化，但植物之间和生理生化指标之间存在差异。运用模糊数学隶属函数分析法和灰色关联分析法，综合评价3种植物的抗旱性和各指标对干旱胁迫的敏感性。结果显示：干旱前期和中期，植物的抗旱性为：狗牙根＞红三叶＞草地早熟禾；干旱后期，植物的抗旱性为：草地早熟禾＞狗牙根＞红三叶；各生理生化指标与植物抗旱隶属度的关联度从大到小依次为0.708，0.694，0.638，0.630，0.609和0.607，可作为岩石边坡生态修复抗旱性植物筛选的评价指标，其中，以叶绿素含量和相对含水量对干旱胁迫的反应最为敏感。

关键词: 干旱胁迫, 岩石边坡, 生态修复, 抗旱性, 隶属函数, 灰色关联分析

Abstract: Drought resistance of plants affects directly the final result of ecological regeneration on rocky slope. In order to research the mechanism of drought resistance of different plants under sustained drought, three plant species including Poa pratensis, Cynodon dactylon and Trifolium pratense,common in the ecological regeneration on rocky slope, were selected to research the changes of 6 drought resistance indexes including the relative water content, relative conductivity, contents of malondialdehyde, soluble carbohydrate, proline and chlorophyll of the plant leaves with pot culture experiments and chemical analysis. The results showed that all the physiologic and biochemical indexes of the plants changed in varying degrees under drought stress. Fuzzy membership function analysis and the grey correlation analysis were used to research the drought resistance of the 3 plant species and the sensitivity of 6 drought resistance indexes to drought stress. The results revealed that the drought resistance of the 3 species was in an order of C. dactylon ＞ T. pretense ＞ P. prarensis at the early and middle drought stages, but in an order of P. prarensis ＞ C. dactylon ＞ T. pretense at the late stage. The correlation degrees between the 6 drought resistance indexes and the membership degrees were in descending order of 0.708, 0.694, 0.638, 0.630, 0.609 and 0.607, so they can be accepted as the indexes of evaluating and selecting the droughtresistant plant species for ecological regeneration on rocky slope. Among these indexes, chlorophyll and relative water content of plant leaves are the most sensitive to drought stress.  

Key words: drought stress, rocky slope, ecological regeneration, drought resistance, membership function, grey correlation analysis