西藏砂生槐细根分布规律研究  

Distribution Patterns of Sophora Moorcroftiana Fine Root in Tibet

作　　者：韩艳英[1] 王贞红[1] 林玲[1] 魏丽萍[1] 陈彦芹[1] 叶彦辉[1] 

机构地区：[1]西藏大学农牧学院,西藏林芝860000

出　　处：《湖北农业科学》2014年第13期3082-3084,3089,共4页Hubei Agricultural Sciences

基　　金：国家公益性(林业)行业科研专项(200904033);西藏农牧学院青年基金资助项目

摘　　要：采用分层挖掘法研究了西藏特有灌木砂生槐（Sophora moorcroftiiana）细根分布特征.结果表明,砂生槐细根生物量和根长密度在垂直分布上呈现一致性,随着土层深度的增加,呈现先增加后减少又有所增加的趋势,主要分布在20～60 cm土层,细根比根长在20～40 cm土层最大.砂生槐细根根长密度和生物量在水平方向的分布规律相似,集中分布在距离树干0～20 cm的空间,距离树干越远分布量越小.Distribution characteristics of fine root of Sophora moorcroftiana in Tibet were studied by layer mining methods.Results showed that fine root biomass and root density of S.moorcroftiana had consistency in the vertical distribution.With the increas of soil depth,it is increased first and then decreased,and mainly distributed in 20～60 cm soil layer with specific root length in 20～40 cm soil layers.Distribution of S.moorcroftiana in fine root length density and biomass in the horizontal direction was the same,mainly distributed in the range 0～20 cm trunk space with far less as distribution was distant from the trunk.

关 键 词：砂生槐(Sophora moorcroftiana) 细根 生物量 比根长 根长密度 

分 类 号：S792.26[农业科学—林木遗传育种] S718[农业科学—林学]