摘要
[目的]揭示土壤全量养分空间分布的异质性,为农田的科学管理及提高作物产量提供理论依据。[方法]通过GIS技术,分析了辽宁省不同土壤深度全碳、全氮、全磷和全钾的空间分布状况。[结果]不同土壤深度全碳、全氮和全磷呈现出东高西低的分布趋势,但全钾在辽西分布较高。土壤表层（0-20 cm）全碳、全氮、全磷和全钾含量均高于下层（20-40 cm）。全钾随土壤深度变化量较小,其表层和下层平均含量分别为17.64和17.08 g/kg。[结论]不同土壤深度全量养分的分布特征为农田管理提供了理论依据。
[Objective]The aim was to reveal the spatial distribution characteristics of total nutrients in soil and provoide a theoretical basis for farmland management and improvement of crop yield.[Method] GIS technique was used to analyze the spatial distribution characteristics of total C,total N,total P and total K in different soil layers in Liaoning Province.[Result] The results showed that the contents of total C,total N,total P decrease from east to west,but the content of total K was higher in west of Liaoning Province.The contents of total C,total N,total P and total K were higher in soil surface（0-20 cm） than the lower（20-40 cm）.Total K varied less with soil depth,and its mean contents in soil surface and soil lower layer were 17.64 and 17.08 g/kg respectively.[Conclusion] The distribution characteristics of total nutrients in different soil layers will provide a theoretical basis for farmland management.
出处
《安徽农业科学》
CAS
北大核心
2010年第7期3601-3604,共4页
Journal of Anhui Agricultural Sciences
基金
科技部公益性项目(SYKYYW200903)
东北工业基地生态承载力与区域生态安全调控(2004CB418507)共同资助
关键词
全碳
全氮
全磷
全钾
空间分布
Total C
Total N
Total P
Total K
Spatial distribution
