库布齐沙漠半固定沙丘上2种草本植物的分布格局  

Spatial pattern analysis of two herbaceous plants on semi-fixed sand dune in Kubqi Desert

作　　者：毕超[1] 周玉喜 赵云杰[3] 杨晓晖[4] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]北京水保生态工程咨询有限公司,北京100055 [3]北京林业大学实验林场,北京100083 [4]中国林业科学研究院荒漠化研究所,北京100091

出　　处：《中国水土保持科学》2012年第6期39-44,共6页Science of Soil and Water Conservation

基　　金：林业公益性行业科研专项经费项目"荒漠生态系统服务功能监测与评估技术研究"(201004010);国家重点基础研究发展计划"干旱区地下有机碳过程及其与无机碳吸收的关系"(2009CB825103)

摘　　要：采用空间点格局分析方法,对库布齐沙漠中典型半固定沙丘的沙地旋覆花、沙米2种主要草本植物的分布格局进行研究。结果表明:多年生植物沙地旋覆花在沙丘不同部位的分布数量变异较一年生植物沙米要大;沙丘上2种草本植物的总体分布格局基本上呈现群聚状态,并从沙丘上部到沙丘下部逐渐减弱,2种间相互关系从沙丘上部到沙丘下部基本表现为从相互促进转变为相互竞争的趋势。沙米作为流沙上的先锋植物,在沙丘从流动到固定过程中作用至关重要,建议在人工促进流沙固定的措施中,可以结合其他工程措施(如沙障等)进行人工沙米种子的撒播,以加速植被的恢复。Kubqi Desert consists mainly of mobile sand dunes.Therefore,Revegetation is necessary to in some key parts such as highway and agricultural or animal husbandry developing areas.This paper studied the spatial pattern of herbaceous plants on typical semi-fixed sand dune using spatial point analysis method.Results show that number variation of perennial Inula salsoloides is greater than that of annual Agriophyllum squarrosum.The general pattern of total plants is basically clumped and becomes less clumped from top to bottom of the sand dune.The relationship of I.salsoloides and A.squarrosum changes from facilitation to competition from top to bottom of sand dune.The main reason for the spatial pattern may result from soil moisture change.A.squarrosum,as a pioneer colonizer,plays an important role in mobile sand dune fixation,hence,seeds of this annual plant should be sprayed for fast revegetation with other non-biological sand-fixation measures during mobile sand dune fixation.

关 键 词：沙米 沙地旋覆花 空间点格局 半固定沙丘 库布齐沙漠 

分 类 号：S812.2[农业科学—草业科学]