干旱区研究

干旱区研究 >

2020 , Vol. 37 >Issue 5: 1256 - 1263

DOI: https://doi.org/10.13866/j.azr.2020.05.18

民勤荒漠植物叶片水分吸收性状研究

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  • （1. 甘肃省治沙研究所，甘肃兰州730070；2. 甘肃省荒漠化与风沙灾害防治国家重点实验室（培育基地）,甘肃武威733000；3. 甘肃民勤荒漠草地生态系统国家野外科学观测研究站，甘肃民勤733300）

收稿日期: 2019-12-09

  修回日期: 2020-06-22

  网络出版日期: 2020-12-16

基金资助

国家青年科学基金项目（31700339）；国家地区基金项目（31760238，31960334，31860116）；国家面上基金项目（41671528）；中国科学院西部之光项目资助

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Study on leaf water uptake traits of desert plants in Minqin

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  • (1. Gansu Desert Control Resesrch Institiute, Lanzhou 730070, Gansu, China; 2. State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating, Wuwei 733000, Gansu, China; 3. Gansu Minqin National Studies Station for Desert Steppe Ecosystem, Minqin 733300, Gansu, China)

Received date: 2019-12-09

  Revised date: 2020-06-22

  Online published: 2020-12-16

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摘要

在水分输入以小量级降水和凝结水为主导的干旱区，植物叶片吸收水分策略具有尤为重要的生态意义。以民勤地区20种荒漠植物为研究对象，测定叶片单位面积吸水量（LWUC）、含水量增加率（RW）、水分饱和亏（WSD）、比叶面积（SLA）、干物质含量（LDMC），分析植物各叶片性状的分布规律及其相互关系，并比较不同功能群植物叶片水分吸收性状的变异特征。结果表明：（1）叶片可以吸收水分，具有利用小量级降水的能力；叶片性状存在较大的种间差异。（2）叶片LWUC与LDMC呈极显著负相关（P＜0.01），RW与WSD呈极显著正相关（P＜0.01）。（3）不同生长型植物叶片LWUC、RW、WSD差异不显著（P＞0.05）。（4）不同质地植物叶片LWUC差异极显著（P＜0.01），其中，肉质多汁类型植物显著（P＜0.05）高于草质、革质类型植物，肉质多汁和叶片退化类型植物差异不显著（P＞0.05）。（5）不同叶面性状植物叶片LWUC差异不显著（P＞0.05），但覆毛类型植物叶片RW、WSD极显著（P＜0.01）高于光滑叶面平均值。总之，本研究可以加深对荒漠生态系统不同功能型植物利用水资源方式和策略的理解，增强对荒漠植物生态适应对策和荒漠植被格局变化的认识，并为其保护和恢复提供科学依据。

关键词： 荒漠植物; 小量级降水; 叶片水分吸收性状; 民勤

本文引用格式

王飞, 郭树江, 韩福贵, 王方琳, 张卫星, 张裕年 . 民勤荒漠植物叶片水分吸收性状研究[J]. 干旱区研究, 2020 , 37(5) : 1256 -1263 . DOI: 10.13866/j.azr.2020.05.18

Abstract

Leaf water absorption strategy is of great ecological significance in arid areas, where the water input is dominated by small precipitation and condensate water. In this study, 20 desert plants were taken as the study object in Minqin.We measured LWUC, RW, WSD, SLA, and LDMC and analyzed the distribution characteristics of plant leaf traits and their correlation; the variation characteristics of leaf water uptake traits of small functional groups were compared. The results showed that (1) the leaves could absorb water and could make use of small precipitation. There were significant interspecific differences in leaf traits. (2) LWUC was significantly negatively correlated with LDMC (P<0.01), and RW was positively correlated with WSD (P<0.01). (3) There were no significant differences in LWUC, RW, and WSD of different plant growth forms (P>0.05). (4) There was a significant difference in LWUC among plants with different leaf textures (P<0.01); the succulents had significantly (P<0.05) higher LWUC than the herbaceous and coriaceous plants, and there was no significant difference between the succulents and the aphyllous plants. (5) There was no significant difference in LWUC between plants with different leaf surface traits (P>0.05), but the RW and WSD of tomentose leaves were significantly higher than those of smooth leaves (P<0.01).This study is expected to help better understand the water use manners and strategies of different functional plantsin desert ecosystems and to improve our knowledge of ecological adaption strategies of desert plants and the changes of desert vegetation patterns to provide a scientific basis for their protection and restoration.

Key words： desert plants; small precipitation leaf water; uptake traits; Minqin

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