影响黄柳地上生物量的关键土壤因子探究  

Exploration of the key soil factor which influences the aboveground biomass of Salix gordejevii shrub

作　　者：苏华[1] 张彦[2] 胡海笑 李永庚[1] 

机构地区：[1]植被与环境变化国家重点实验室,中国科学院植物研究所,北京100093 [2]北京师范大学第二附属中学,北京100088 [3]中国科学院大学,北京100049

出　　处：《干旱区资源与环境》2015年第11期185-190,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(31400338);中国科学院战略先导科技专项(XDA05070102);北京青少年科技后备人才早期培养计划资助

摘　　要：黄柳在浑善达克沙地多数生境均有分布,但何种土壤因子决定其生物量变化尚不清楚。本研究于丘间凹地、半固定沙丘和固定沙丘调查,运用相关分析和多元回归分析探究黄柳地上生物量与土壤因子的关系。丘间凹地的黄柳植株最高（-2.2m）,枝条数最多（-17.9）,比叶面积最大（-113.9cm2g-1）,地上生物量最高（-2533g/株）,半固定沙丘次之。在土壤含水量、p H值、有机质、氮、磷和钾含量等因子中,土壤含水量是影响黄柳地上生物量的关键因子。Salix gordejevii widely distributes in most of the habitats of Hunshandake Sandy Land. However,it remains unclear that which soil facter detemines its biomass changes. We investigated representative S. gordejevii mature individuals growing in three habitats,i. e. lowland,semi- fixed dune and fixed dune,and explored the relationships between the aboveground biomass of S. gordejevii and the several soil factors,e. g. soil p H values,water contents,organic matter contents,total nitrogen contents,total phosphorus contents and total potassium contents. S. gordejevii living in lowland is the best,with the largest height（ - 2. 2m）,the most shoots（ - 17.9）,the largest specific leaf area（ - 113. 9cm2·g- 1） and the highest aboveground biomass（ - 2533 g per plant）. Next is that growing in semi- fixed dune. Soil water content should be the key factor influencing the aboveground biomass of S. gordejevii in Hunshandake Sandy Land.

关 键 词：生物量 黄柳 生境调查 土壤水分 浑善达克沙地 

分 类 号：Q945.79[生物学—植物学]