塔里木河下游地区胡杨、柽柳液流变化研究——以英苏断面为例Analysis on the Variation of Sap Flow of Populus euphratica Oliv.and Chinese Tamarisk at the Lower Reaches of Tarim River—A Case Study Along Yinsu Section
何斌,陈亚宁,李卫红,陈永金
摘要(Abstract):
应用先进的PHYTALK植物生理生态监测系统对塔里木河下游英苏断面胡杨、柽柳的液流流速和相关环境因子日变化进行了监测。结果表明:胡杨和柽柳的液流速率日变化趋势相似,有明显昼夜节律变化,夜晚平稳,白天波动剧烈,呈多峰值;受植株水分储存的影响,液流早晨启动后,液流突然下降,达到一个低值后开始恢复;主要受降雨影响,距主河道100m处的胡杨枝平均液流速率低于距主河道200m处相同直径柽柳枝的平均流速;试验期,影响胡杨和柽柳液流的主导环境因子不同,每个因子都有各自的影响机制;植株液流的变化是植株自身生理调节和外界环境共同作用的结果。
关键词(KeyWords): 胡杨;柽柳;液流流速;环境因子;塔里木河
基金项目(Foundation): 中国科学院知识创新项目;; 国家自然科学基金(90502007,30500081)资助
作者(Author): 何斌,陈亚宁,李卫红,陈永金
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