Research on Time and Spatial Variability of Soil pH in Sanmenxia Planted Tobacco Area

Abstract : Geostatistics combined with GIS spatial technology was applied to analyze the time and spatial variability of pH in topsoil(0-20cm) for planted tobacco region in Sanmenxia district. The results indicated that the pH value range form 6.5 to 8.8 and meet to the need of produce high quality tobacco, but the pH value of partial region is high. The pH value accord with logarithm normal distribution, variance coefficient is 15.2% and 4.5% of 2002 and 2007 year respectively. The semivariogram of pH was best described by the exponential model and spatial heterogeneity of pH were 55.77km and 92.39km. The Kriging interpolated method was applied to calculated the unobserved points and was used to generate the spatial and discrepancy map, analyzed the reason of the pH value increase and the method to improve soil. The research supply important method of the Sanmenxia high quality tobacco produce.
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Communication dans un congrès
Daoliang Li; Chunjiang Zhao. Third IFIP TC 12 International Conference on Computer and Computing Technologies in Agriculture III (CCTA), Oct 2009, Beijing, China. Springer, IFIP Advances in Information and Communication Technology, AICT-317, pp.420-426, 2010, Computer and Computing Technologies in Agriculture III. 〈10.1007/978-3-642-12220-0_61〉
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Hongbo Qiao, Gao Rui, Zhang Hui, Yanchun Chen, Yongshi Su. Research on Time and Spatial Variability of Soil pH in Sanmenxia Planted Tobacco Area. Daoliang Li; Chunjiang Zhao. Third IFIP TC 12 International Conference on Computer and Computing Technologies in Agriculture III (CCTA), Oct 2009, Beijing, China. Springer, IFIP Advances in Information and Communication Technology, AICT-317, pp.420-426, 2010, Computer and Computing Technologies in Agriculture III. 〈10.1007/978-3-642-12220-0_61〉. 〈hal-01055419〉

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