[1]CHEN Hai-sheng,WANG Shi-jie,ZHAO Yu-ming.Spatial Variability of Available Soil Nutrients in Tobacco Planting Fields in Central He'nan Province[J].Research of Soil and Water Conservation,2014,21(04):78-81.

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Spatial Variability of Available Soil Nutrients in Tobacco Planting Fields in Central He'nan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 04 Page number: 78-81 Column: Public date: 2014-08-28

Title:: Spatial Variability of Available Soil Nutrients in Tobacco Planting Fields in Central He'nan Province

Author(s):: CHEN Hai-sheng^1,2, WANG Shi-jie¹, ZHAO Yu-ming¹; 1. Pingdingshan University, Pingdingshan, He'nan 467000, China;
2. Zhejiang Tongji Vocational College of Science and Technology, Hangzhou 311231, China

Keywords:: geostatistics; GIS; available soil nutrient; central He'nan Province

CLC:: S158.3

DOI:: -

Abstract:: Geostatistics method with geographic information system(GIS),was applied to study the spatial variability of available soil nutrients of tobacco planting fields in Central China. The results showed that the contents of available N were at lower level, while the contents of available P and available K were at high levels. The coefficient of variation of available N is the smallest among three nutrients, while the coefficient of variation of available P was the greatest. Analysis of the isotropic variogram indicated that the contents of available N in tobacco planting fields were well described by liner model, while the contents of available P and available K were well described by spherical models. Available K and P had a medium spatial autocorrelation, while the available N had weak autocorrelation. Correlation matrix of soil nutrients revealed that there was significant positive correlation between soil pH and available N and available P in the study regions, while there was significant positive correlation between soil organic matter and available N, available P and available K. The maps generated by ordinary Kriging also revealed the distribution of available soil nutrients in central He'nan Province, which can provided the basis for precise fertilization.

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