| Surveying soil salinization in Fengqiu County based on EM38 |
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| DOI：10.7606/j.issn.1000-7601.2008.05.27 |
| Key Words: EM38 soil salinization Kriging interpolation |
| Author Name | Affiliation | | WU Yakun | Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China | | YANG Jingsong | Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China | | YANG Xiaoying | Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China | | LIU Guangming | Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China |
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| Abstract: |
| Taking into account the problem of soil salinization existing in Fengqiu County, soil salinization was surveyed using the EM38 (electromagnetic induction). Spatial variability of soil salinity was measured and analyzed using statistics. Spatia1 distribution maps of soi1 salinity for different soil layers were also mapped． The results indicated that EMH ECa(apparent soil electrical conductivity) and EMV ECa had the highest sample correlation. Soil salinity of 0～30 and 30～60 cm soil layer was interpreted by apparent electrical conductivity of hertical mode, while soil salinity of 60～90 and 90～120 cm soil layer was interpreted by apparent electrical conductivity of vertical mode. The mean of soil salinity was from 0.498 to 0.543. Soil salinity of the study area showed the moderate spatial variability. Spatial variability of soil salinity was better mapped by survey result of EM38 and Kriging interpolation. Soil salinization was mainly located in the southeast of study area and had obvious trend effect. Soil salinity of soil surface was the greatest and had trend of decreased and then increased by depth of soil. |
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