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《Shandong Agricultural Sciences》 2009-02
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Model Study of Wheat Soil Property Parameters at Precision Scale

YANG Yu-jian,TONG Xue-qin(Research Center of Science and Technology Information Engineering, Shandong Academy of Agricultural Sciences,Jinan 250100,China)  
Spatial variability and fractal dimension of soil property parameters,including available potassium,available phosphorus,organic matter,alkali hydrolysable nitrogen and pH value,were studied from 104 observation points by geo-statistics and fractal model.It was shown that the semivariogram structure of the tested soil property parameters were spherical.There was strong spatial autocorrelation of soil pH within the spatial correlation distance of 84.271 m;medium spatial autocorrelation of SOM,soil alkaline hydrolysis nitrogen and soil available potassium within the spatial correlation distance of 44.898 m,45.191 m and 57.691 m respectively;weak spatial autocorrelation of soil available phosphorus within the spatial correlation distance of 23.328 m.Both their fractal dimensions and stability indices were pH value available potassium alkaline hydrolysis nitrogenorganic matter available phosphorus,so their spatial homogeneity between samples and stability of spatial distribution decreased in the order.
【Fund】: 山东省农业科学院青年科研基金项目(2005YQ021)资助
【CateGory Index】: S512.1
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