科尔沁草原不同类型沙地土壤养分研究  

A study on spatial heterogeneity of soil nutrient in the different sands of Horqin grasslands

作　　者：占布拉[1] 卫智军[1] 黄伟华 乌仁花尔[1] 

机构地区：[1]内蒙古农业大学,呼和浩特010019 [2]鄂尔多斯市政府,鄂尔多斯017200

出　　处：《干旱区资源与环境》2010年第11期135-138,共4页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(M0325001);中德国际科技合作项目(2008DFA32270)资助

摘　　要：根据沙丘的固定程度和植物群落覆盖度将科尔沁沙地划分为固定沙地、半固定沙地和流动沙地三种不同景观斑块类型的基础上,于2007年8月份对其进行了土壤养分的空间异质性分析与研究。结果表明:科尔沁沙地土壤养分含量总体水平不高,不同景观斑块类型沙地的土壤养分变化规律因养分种类的不同而不同。固定沙地的土壤全氮、全钾含量较半固定沙地高,半固定沙地土壤全氮、全钾含量较流动沙地土壤全氮含量高。固定沙地的土壤碱解氮、全磷含量较半固定沙地高,半固定沙地土壤碱解氮、全磷含量较流动沙地土壤碱解氮含量低,全氮和全磷,全氮和速效磷以及全磷和速效磷之间存在显著的相关性。固定沙地的土壤水分、有机质含量较半固定沙地高,半固定沙地土壤水分、有机质含量较流动沙地土壤水分、有机质含量高。Horqin sand was divided into three types of landscape patches：fixed sand,semi-fixed sand and drift sand according to the extent of the stabilized sand dune and the plant community coverage.A study on spatial heterogeneity of soil nutrient in the different sands was carried out in August 2007.The results showed that：soil nutrient content of Horqin sand was not high,which also changed with different types of landscape patches.The contents of total nitrogen and potassium in fixed sand were higher than that in semi-fixed sand,and of which in semi-fixed sandy soil were higher than that in drift sand.The contents of alkali nitrogen and total phosphorus in fixed sand were higher than that in semi-fixed sand,and of which in semi-fixed sand were lower than that in drift sand.The contents of total nitrogen and phosphorus,total nitrogen and available phosphorus and total phosphorus and available phosphorus were significantly correlation.Soil moisture and organic matter content in fixed sand were higher than that in semi-fixed sand,and of which in semi-fixed sand were higher than that in drift sand.

关 键 词：科尔沁 不同类型沙地 土壤养分 空间异质性 

分 类 号：S158.3[农业科学—土壤学]