库布齐沙漠不同类型沙地上植物群落根系研究  

Study on root system of plant community in different kinds of sandy land in Hobq

作　　者：马阔东[1,2] 高丽[1,2] 闫志坚[1,2] 阿斯嘎[3] 富兰格[3] 

机构地区：[1]中国农业科学院草原研究所,内蒙古呼和浩特010010 [2]农业部草地资源与生态重点开放实验室,内蒙古呼和浩特010010 [3]内蒙古大学生命科学系,内蒙古呼和浩特010021

出　　处：《草业科学》2010年第5期1-9,共9页Pratacultural Science

基　　金：中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所)资助项目(2006-1-03)

摘　　要：通过对库布齐沙漠不同类型沙地上植物群落根系生物量的测定,比较分析了不同植物群落根长密度、根质量密度、比根长以及不同径级根系根长密度的垂直分布格局。结果表明：不同类型沙地植物群落总根长差异不显著,总根质量与比根长差异显著,且根系主要分布于0-30 cm土层。土壤容重与土壤含水量均对沙地植被的根系垂直分布影响较大,但对不同类型沙地根系参数的影响存在差异。细根（d≤2 mm）垂直分布特征明显,在总根系当中所占比例很大。An experiment was conducted in Hobq to study the root system biomass in different kinds of sandy land.Root length density,root weight density,specific root length and root length density in different diameters and their vertical distribution patterns of root system was also analyzed.Result shows that the total root weight an specific root length have significant difference but the total root length has no significant difference,and the root system are all concentrated in the 0 to 30 cm soil depth.The vertical distribution of root system is greatly affected by soil water content and soil bulk density,but the effect has different in different sandy lands.The fine root（d≤2 mm） takes great proportion in total root system and with significantly vertical distribution characteristics.

关 键 词：库布齐沙漠 根系参数 垂直分布 径级 土壤特性 

分 类 号：Q948[生物学—植物学]