草地学报2026，Vol.34Issue(1)：52-60,9.DOI:10.11733/j.issn.1007-0435.2026.01.006
少花蒺藜草植物功能性状对降雨量变化和遮光的响应
Responses of Plant Functional Traits of Cenchrus spinifex to Rainfall Changes and Shading
摘要
Abstract
Under the context of global change,plant invasion events have become more frequent and wide-spread.Rainfall and light are important ecological factors that affect the adaptation and dispersal of invasive plants.Cenchrus spinifex,a major invasive plant in the Horqin Sandy Land China,has expanded its invasion area in recent years,posing significant threats to local biodiversity and ecosystem functions.Understanding its invasion and adaptation mechanisms is crucial for devising effective control strategies.In this study,we estab-lished an in situ field experiment by using pipe cultivation to explore the functional traits of Cenchrus spinifex under three treatments:increased rainfall,reduced rainfall,shading,and a control(CK)group.The results revealed that both increased rainfall and reduced rainfall significantly enhanced plant heigh.increased rainfall increased branching,the number of reproductive branches,spiny burs,leaf biomass,and leaf contribution ratio significantly.Reduced rainfall promoted tiller number,total root length,root contribution ratio,and spiny bur contribution ratio significantly.In contrast,shading significantly reduced crown width,spiny bur number,total root length,and biomass of all organs.These findings indicate that Cenchrus spinifex adapts to variations in rainfall and light availability by modulating plant architecture,biomass of organ and biomass allocation.This study provides a theoretical basis for revealing the invasion and adaptation mechanisms of Cenchrus spinifex under the background of climate change,and to provide reference for predicting its suitable or spreading areas.关键词
少花蒺藜草/降雨量/遮光/株型特征/生物量Key words
Cenchrus spinifex/Rainfall/Shading/Plant type characteristics/Biomass分类
农业科技引用本文复制引用
安麒,高凯,孙忠林,连继明,毕北..少花蒺藜草植物功能性状对降雨量变化和遮光的响应[J].草地学报,2026,34(1):52-60,9.基金项目
内蒙古自然基金(2023LHMS030507) （2023LHMS030507）
草原少花蒺藜草、刺萼龙葵扩散机制与综合防控(S22002)资助 （S22002）
