摘要
利用地统计学方法研究了额济纳绿洲土壤有机质、全氮、全磷、全钾的空间异质性。结果表明:土壤养分含量分布均有较大的空间异质性,土壤有机质的理论模型为指数模型,全氮、全磷和全钾的理论模型均为球状模型;额济纳绿洲土壤有机质、全氮、全钾主要受结构性因子的影响,全磷受结构性因子和随机因子的共同影响;全氮、全磷和全钾的变程在7.68～7.86km,土壤有机质的变程较小,为5.4km。土壤养分的空间分布表现为南北高,中间低的分布格局。
By the methods of geostatistics,the spatial heterogeneity of soil organic matter,total nitrogen,total phosphorus,and total potassium in Ejina oasis was studied.All the test nutrient variables had significant spatial heterogeneity.The spatial variation of soil organic matter fitted exponential model,while those of soil total nitrogen,total phosphorus,and total potassium fitted spherical model.Soil organic matter,total nitrogen,and total potassium were greatly affected by soil structural factors,while soil total potassium was co-affected by structural and random factors.The spatial variation ranges of soil total nitrogen,total phosphorus,and total potassium were 7.68-7.86 km,and that of soil organic matter was comparatively small,being 5.4 km.The spatial distribution of soil nutrients was high in south and north oasis,and low in central oasis.
出处
《生态学杂志》
CAS
CSCD
北大核心
2009年第12期2600-2606,共7页
Chinese Journal of Ecology
基金
国家自然科学基金项目(40725001
90702001)
中国科学院西部行动计划资助项目(KZCX-XB2-04-02)
