塔克拉玛干沙漠土壤种子库特征初探  

Evaluation of Soil Seed Banks in the Taklimakan Desert

作　　者：马建兵[1,2] 张希明[1] 闫海龙[1,2] 杨小林[1,2] 王伟华[1,2] 

机构地区：[1]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 [2]中国科学院研究生院,北京100039

出　　处：《干旱区研究》2009年第1期71-77,共7页Arid Zone Research

基　　金：中国科学院知识创新工程重要方向性项目(KZCX3-SW-342-02);科技部“西部开发科技行动”重大项目(2004BA901A21-1)

摘　　要：通过野外采样和室外萌发的方法,研究了塔克拉玛干沙漠公路沿线6种立地类型的土壤种子库特点。其主要结论:①所有立地类型的土壤种子库密度都很小。立地类型Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ的土壤种子库密度分别为:(46.20±4.45)粒/m2,(27.50±5.58)粒/m2,(15.00±3.37)粒/m2,(6.52±0.87)粒/m2,(10.00±2.42)粒/m2和(50.00±5.50)粒/m2。②所有立地类型土壤种子库中所出现的物种数量都很少。③所有立地类型土壤种子库中出现的物种生活型,一年生草本并不占优势。④在塔克拉玛干沙漠空间分布上,沙漠南缘和北缘的土壤种子库密度和物种多样性较大,而中部的密度和物种多样性较小。Soil seed banks represent the potential regeneration capability of a community.This study was conducted to evaluate the seed density and species diversity of soil seed banks in areas with different local conditions along the Taklimakan Desert Highway based on field sampling and an outdoor bourgeoning experiment.The results of this study were as follows:(1) The seed densities in areas with all six types of local conditions evaluated in this study were very low.Specifically,the densities were(46.20±4.45) seed...

关 键 词：土壤种子库 立地类型 物种多样性 相似性系数 塔克拉玛干沙漠 

分 类 号：S154.4[农业科学—土壤学]