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《Research of Soil and Water Conservation》 2008-01
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Study on the Relations Between Topographical Factors and the Spatial Distributions of Soil Nutrients

QIN Song,FAN Yan,LIU Hong-bin,WANG Zheng-yin(Southwest University Recourses and Environment Institute,Chongqing 400716,China)  
Using Geostatistic and the technology of GIS to study the spatial variability of soil nutrients in the hilly area,and to discuss how topographical factors can impact the spatial distribution of soil nutrients.The results showed that the spatial variability of N,K came from random factors,but to some extent Mg and the other nutrients' spatial variability was affected by structural factors.The correlativity between OM,N,P,K and altitude were remarkably positive,and Ca,Mg,S were negatively correlated to altitude;the correlation of N and slop was notability positive,but Ca was negative;OM,N,P were negatively related to aspect too,and Ca,Mg were positive;However,the correlation between K,S and topographical factors was not remarkable.To study the spatial relations between topography and soil nutrients would provide academic bases for land use and programming reasonably,and also have works on the guidance of the soil nutrients management and soil improvement and cultivation.
【Fund】: PPI/PPIC项目资助
【CateGory Index】: S158
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