科尔沁沙地三种沙蒿植株构型特征与防风固沙效应研究  

Studies on Architectural Characteristics and Sand-fixing Effects of Three Artemisia Plants in Horqin Sandy Land

作　　者：苏日格嘎 王铁娟[1] 孙海玉[1] 员艳丽 杜俊瑞[1] 

机构地区：[1]内蒙古师范大学生命科学与技术学院,呼和浩特010022

出　　处：《内蒙古大学学报（自然科学版）》2015年第3期270-276,共7页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金(31160130);内蒙古自治区自然科学基金资助(2011MS0524)

摘　　要：研究了生长在科尔沁沙地西部的三种半灌木差不嘎蒿、乌丹蒿与白沙蒿的构型特征及粗糙元密集度.结果表明:三种植物枝条的长度随枝级的变小逐渐变短.乌丹蒿减小幅度最为明显,一级枝条的长度显著短于另两个种,且总分枝率和逐步分枝率均为最小,而白沙蒿各级枝条分枝角度较大,枝条的生长能更充分地利用资源空间.以粗糙元密集度(Lc)来分析三种植物的固沙效应,研究区的白沙蒿Lc值明显为高,差不嘎蒿与乌丹蒿接近.反映出飞播到科尔沁沙地西部的白沙蒿有着很好的种群固沙效益.The architectural characteristics and roughness concentration（Lc）of three subshrub,Artemisia halodendron,A.wudanicaand A.sphaerocephala,were studied,which grow in the western Horqin Sandy Land.The results showed that the branch length of the three species were getting shorter with the decrease of the branch class.A.wudanicahad the most significant decrease trend,and its first class branch length was significantly shorter than the other two.Moreover,its total bifurcation ratio and the gradual bifurcation ratio were the smallest among the three species.A.sphaerocephala had bigger branch angle than the other two,demonstrating a better resource using ability.Then the sand-fixation effect were compared among the three species in the research area based on the Lc.The results showed that A.sphaerocephalahad the highest Lcvalue while A.halodendron had similar value with wudanica,which indicated that A.sphaerocephala had good sandfixation effect in this area.

关 键 词：白沙蒿 差不嘎蒿 乌丹蒿 构型特征 粗糙元密集度 

分 类 号：Q948.1[生物学—植物学] S718.5[农业科学—林学]