Research Article | OPEN ACCESS
Three-Dimensional Variation of Electrical Conductivity in a Paddy Rice Soil Based on the Disjunctive Kriging Method
1, 2Li Hongyi, 1Wu Cifang, 3Li Fanghao and 4Shi Zhou
1College of Public Administration, Zhejiang University, Hangzhou 310029, China
2School of Tourism and Urban Management, Jiangxi University of Finance and Economics, Nanchang 330013, China
3Department of Land and Resources of Jiangxi Province, Nanchang 330013, China
4College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China
Research Journal of Applied Sciences, Engineering and Technology 2013 8:1486-1489
Received: October 31, 2012 | Accepted: January 03, 2013 | Published: July 10, 2013
Abstract
The aim of the study was using the disjunctive kriging method to analyze the three dimensional variation of soil electrical conductivity in a costal saline land in the Yangste delta of China. Fifty six soil apparent Electrical Conductivity (ECa) profiles, which inversed by the procedure that combine the EM38 linear model, were selected as the datum source of 3D spatial variability. Firstly, for facilitating the selection of crops risk evaluation threshold value, ECa was transferred to ECe according to the experience model. Secondly, the ECe distribution at the ten layers was transformed with a standard normal distribution by lognormal transformation. At last, the spatial variability of soil electrical conductivity of the all 10 layer was predicted by the disjunctive kriging method and the layers were stacked one by one. It presented a superior visualization of spatial distribution of ECe in 3D space directly that 2D interpolation can’t achieve. The higher ECe, the higher the salinity is. From the top surface map, the spatial distribution of soil salinity can be easily recognized, which is helpful in management on fertility, analyzing experimental data to reduce subjective judgment and developing and applying agronomic practices.
Keywords:
Disjunctive kriging, electrical conductivity, saline soils, three-dimensional variation,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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