不同着生高度胡杨异形叶水分利用效率研究  

Water Use Efficiency of Heteromorphic Leaves of Populus euphratica at Different Growing Heights

作　　者：成莉莉 韩航 刘彤 冯金朝[1] CHENG Lili;HAN Hang;LIU Tong;FENG Jinchao(College of Life and Environmental Science,Minzu University of China,Beijing 100081,China)

机构地区：[1]中央民族大学生命与环境科学学院,北京100081

出　　处：《中央民族大学学报（自然科学版）》2023年第3期5-12,共8页Journal of Minzu University of China(Natural Sciences Edition)

基　　金：国家自然科学基金项目(31570407);中央民族大学2020年度交叉学科研究专项(2020MDJC09);农业文化遗产保护与利用项目(2021XSTD02)。

摘　　要：本文以内蒙古额济纳旗胡杨为研究对象,通过测定胡杨不同形态叶片的生理指标,探讨不同树龄的胡杨位于不同生长高度的异形叶水分利用效率,旨在揭示胡杨适应荒漠环境的生理生态机理,为胡杨林保护和生态修复提供科学依据。结果表明:随着不同植株冠层高度的增加,胡杨群落内叶片水分利用效率呈现先增加后降低的趋势;随着同一植株的高度增加,胡杨叶片的水分利用效率表现为降低的变化趋势,水分利用效率日变化幅度变小;相同形态类型的胡杨叶片随植株树龄和植株高度的变化差异较大。The water use efficiency of Populus euphratica heteromorphic leaves was investigated by measuring the water physiological indexes of leaves of different heights, different stand ages and different leaf shapes in P. euphratica forest in Ejina Banner, Inner Mongolia. The aim is to further reveal the eco-physiological mechanisms of P. euphratica adaptation to desert environments, and to provide theoretical basis for P. euphratica forest conservation and ecological restoration. The results showed that the water use efficiency of leaves of P. euphratica tended to increase and then decrease with the increase canopy height;The water use efficiency of leaves of the same plant showed a decrease with increasing height, and the daily variation of water use efficiency became smaller;The same type of leaf varies with height depending on the age of the P. euphratica plant.

关 键 词：胡杨 异形叶 植株高度 水分利用效率 

分 类 号：Q945.171[生物学—植物学]