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[1]LA Gui-xiao,GU Huai-sheng,LIU Guo-shun,et al.Spatial Heterogeneity of Soil Nutrients in Karst Tobacco-growing Areas[J].Research of Soil and Water Conservation,2012,19(03):48-53.

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Spatial Heterogeneity of Soil Nutrients in Karst Tobacco-growing Areas

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 03 Page number: 48-53 Column: Public date: 2012-06-20

Title:: Spatial Heterogeneity of Soil Nutrients in Karst Tobacco-growing Areas

Author(s):: LA Gui-xiao^1,2, GU Huai-sheng³, LIU Guo-shun¹, LI Zu-liang¹, ZHAI Xin³; 1. National Tobacco Cultivation, Physiology and Bio-chemistry Research Center, College of Tobacco Science, He’nan Agricultural University, Zhengzhou 450002, China;
2. Economic Crop Research Institute, He’nan Academy of Agricultural Sciences, Zhengzhou 450002, China;
3. Bijie Branch of Guizhou Tobacco Company, Bijie, Guizhou 551700, China

Keywords:: karst; Bijie region; tobacco-growing areas; soil nutrient; spatial variability; geostatistics; GIS

CLC:: S153.6;S158.9

DOI:: -

Abstract:: In order to provide basis for tobacco balanced fertilization and ecological environment protection in karst areas, the spatial heterogeneity of soil nutrients in karst tobacco-growing areas of Bijie, Guizhou province, was studied by the methods of geostatistics and GIS. Statistic analysis showed each soil nutrient had moderate variation. Spherical model fitted best for total N, total K and available P, linear model fitted best for soil total P and available K, and exponential model fitted best for other variables. By analysis of ratios of nugget to sill, soil available P showed strong spatial autocorrelation fundamentally controlled by structural factors, while other variables showed moderate spatial autocorrelation affected by both structural and random factors. According to the spatial distribution maps of soil nutrients, the distribution of total N, total K, available P and available K was continuous, other than total P, alkaline N, pH and organic matter,which should be due to the complicated site factors in karst areas and human impact.

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