干旱区研究

干旱区研究 >

2018 , Vol. 35 >Issue 2: 370 - 378

DOI: https://doi.org/10.13866/j.azr.2018.02.15

生物及生物资源

艾比湖自然保护区盐生植物的分布及其水分利用效率

  • 李宏侠 ,
  • 杨晓东 ,
  • 吕光辉 ,
  • 刘卫国
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  • 1.绿洲生态教育部重点实验室,新疆 乌鲁木齐 830046;
    2.新疆大学资源与环境科学学院,新疆 乌鲁木齐 830046;
    3.智慧城市与环境建模自治区普通高校重点实验室,新疆 乌鲁木齐 830046
李宏侠(1992-),女,硕士研究生,研究方向为生态系统与全球变化. E-mail: lhxxxxhhh@163.com
杨晓东. E-mail:xjyangxd@sina.com

收稿日期: 2017-05-23

  修回日期: 2017-10-09

  网络出版日期: 2025-11-17

基金资助

国家自然基金项目(31500343); 新疆自治区青年科技创新人才培养工程项目(qn2015bs006)

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Distribution and Water Use Efficiency of Halophytes in the Ebinur Lake Nature Reserve

  • LI Hong-xia ,
  • YANG Xiao-dong ,
  • LV Guang-hui ,
  • LIU Wei-guo
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  • 1. Key Laboratory of Oasis Ecology of Ministry of Education,Urumqi 830046,Xinjiang,China;
    2. College of Resources and Environment Sciences,Xinjiang University,Urumqi,830046,Xinjiang,China;
    3. Xinjiang Key Laboratory of Colleges and Universities for Smart Cities and Environment Modeling,Urumqi,830046,Xinjiang,China

Received date: 2017-05-23

  Revised date: 2017-10-09

  Online published: 2025-11-17

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摘要

以艾比湖自然保护区内盐生植物为研究对象,采用野外调查与室内实验相结合的方法,揭示土壤盐含量与盐生植物数量分布及水分利用效率之间的关系。结果表明:① 采集的9个土壤样地可划分成高、中和低盐度区3种类型;② 拒盐和泌盐植物的丰富度在土壤盐分梯度上没有显著性差别,稀盐植物的丰富度在高盐度区显著高于中、低盐度区(高>中>低) (P<0.05),拒盐、泌盐和稀盐植物的多度在中盐度区均显著高于高、低盐度区(中>高>低) (P<0.05)。在高、中盐度区,盐生植物的多度和丰富度为:稀盐>拒盐>泌盐植物;相反,在低盐度区,泌盐>拒盐>稀盐植物;③ 稀盐和泌盐植物的δ13C值在盐分梯度上存在显著性差异(P<0.05);拒盐植物的δ13C值在土壤盐分梯度上无显著性差异 (P>0.05);④ 中盐度区泌盐植物的δ13C值显著低于拒盐和稀盐植物外(P<0.05),在高盐度和低盐度区,3种盐生植物的δ13C值没有显著性变化(P>0.05);⑤ 拒盐、稀盐和泌盐植物的脯氨酸、可溶性蛋白质、可溶性糖和硝酸还原酶活性在3个土壤盐分梯度上均无显著性差异(P>0.05);⑥ 同土壤盐分条件下,除可溶性蛋白质、可溶性糖和硝酸还原酶活性在少数情况下3种盐生植物间有差别外,大多情况下植物抗胁迫生理指标在3种盐生植物间没有显著性变化(P>0.05);⑦ 抗胁迫生理指标、δ13C值、多度和丰富度之间的关系随盐生植物种类迥异。综合以上分析,盐生植物在土壤盐分梯度上的分布、水分利用效率均与盐生植物的类型有关,其变化可能受内部生理调节、盐分的运输规律等多种因素的综合影响。

关键词： 土壤; 盐分梯度; 盐生植物; 水分利用效率; 多度; 丰富度; 自然保护区; 艾比湖

本文引用格式

李宏侠 , 杨晓东 , 吕光辉 , 刘卫国 . 艾比湖自然保护区盐生植物的分布及其水分利用效率[J]. 干旱区研究, 2018 , 35(2) : 370 -378 . DOI: 10.13866/j.azr.2018.02.15

Abstract

In this paper,the relationships among soil salinity,numerical distribution of plants and water use efficiency (WUE) of halophytes along soil salinity gradient in the Ebinur Lake Nature Reserve were revealed.Three halophyte types,i.e.pseudohalophytes,recretohalophytes and euhalophytes,were chosen as the research objects,and the WUE,numerical characteristics,physiological indexes and soil salinity were analyzed by using δ13C,community investigation and laboratory experiments.The results are as follows: ① The nine soil samples collected from the study area were divided into three types,i.e.the samples with high,moderate and low soil salinity; ② There was no significant abundance difference between pseudohalophytes and recretohalophytes along soil salinity gradient,but the abundance of euhalophytes in the areas with high soil salinity was significantly higher than that in the areas with moderate and low soil salinity (P<0.05).The richness of pseudohalophytes,recretohalophytes and euhalophytes was obviously higher in the areas with moderate soil salinity than that in the areas with high and low soil salinity (P<0.05).In the areas with high and moderate soil salinity,the abundance and richness of halophytes were in an order of euhalophytes > pseudohalophytes > recretohalophytes,but in an order of recretohalophytes>pseudohalophytes > euhalophytes in the areas with low soil salinity; ③ There was no significant difference in δ13C values of pseudohalophytes along soil salinity gradient (P>0.05),but a significant difference between pseudohalophyte and euhalophytes (P<0.05); ④ Except the δ13C values of recretohalophytes were significantly lower than those of secretohalophytes and euhalophytes in the areas with moderate soil salinity (P<0.05),there was no significant change of the δ13C values of 3 halophytes in the areas with high and low soil salinity (P>0.05); ⑤ There were no significant differences in the physiological indexes,i.e.proline,soluble protein,soluble sugar and nitrate reductase activity of pseudohalophyte,recretohalophytes and euhalophytes along three soil salinity gradients; ⑥ In most cases,there were no significant changes of physiological indexes among euhalophytes,pseudohalophyte and recretohalophytes along soil salinity gradients (P>0.05); ⑦ Relationships among physiological indexes,δ13C value,abundance and richness varied from the different types of halophytes.

Key words： soil; salt gradient; halophyte; WUE; abundance; richness; Nature Reserve; Ebinur Lake

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