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A New Soil Sampling Design in Coastal Saline Region Using EM38 and VQT Method
Yao, Rongjiang1,2; Yang, Jingsong1,2; Zhao, Xiufang1; Chen, Xiaobing3; Han, Jianjun1; Li, Xiaoming1; Liu, Meixian1; Shao, Hongbo3
2012-09-01
发表期刊CLEAN-SOIL AIR WATER
卷号40期号:9页码:972-979
摘要Spatial sampling design based on the variability and distribution of soil properties is an important issue with the progress in precision agriculture and soil ecology. Electromagnetic induction (type EM38) and variance quad-tree (VQT) method were both applied to optimize the sampling scheme of soil salinity in a coastal reclamation field in north Jiangsu Province, China. Apparent soil electrical conductivity (ECa) measured with EM38 was used as an ancillary variable and the spatial distribution of ECa was used as priori information. The process and result of VQT algorithm analysis was illustrated and the obtained sampling strategy was validated using observed soil salinity. Then the spatial precision and sampling efficiency were evaluated. The result indicated that the spatial distribution of soil salinity produced with the VQT scheme was quite similar to that produced with total sampling sites, while sampling quantity of the former was reduced to approximately 1/2 of the latter. The spatial precision of VQT scheme was considerably higher than that of traditional grid method with respect to the same sampling number, and fewer samples were required for VQT scheme to obtain the same precision level. A 17.3% increase in sampling efficiency was achieved by VQT over grid method at the precision level of 90%. The VQT method was proved to be more efficient and economical because it can sample intensively or sparsely according to variation status in local areas. The associated application of EM38 and VQT method provides efficient tools and theoretical basis for saving sampling cost and improving sampling efficiency in coastal saline region and enriching soil ecology.
关键词Coastal Saline Region Electromagnetic Induction Sampling Design Variability Variance Quad-tree
学科领域环境科学
收录类别SCI
关键词[WOS]ELECTROMAGNETIC INDUCTION ; SPATIAL PREDICTION ; WETLAND SOILS ; CHINA ; CONTAMINATION ; INFORMATION ; VARIABILITY ; CALIBRATION ; ALGORITHM ; VARIANCE
文章类型Article
语种英语
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS记录号WOS:000308932800012
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/5698
专题滨海湿地实验室
作者单位1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Nanjing Branch, Dongtai Inst Tidal Flat Res, Dongtai, Peoples R China
3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Shandong Prov Key Lab Coastal Environm Proc, Yantai, Peoples R China
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GB/T 7714
Yao, Rongjiang,Yang, Jingsong,Zhao, Xiufang,et al. A New Soil Sampling Design in Coastal Saline Region Using EM38 and VQT Method[J]. CLEAN-SOIL AIR WATER,2012,40(9):972-979.
APA Yao, Rongjiang.,Yang, Jingsong.,Zhao, Xiufang.,Chen, Xiaobing.,Han, Jianjun.,...&Shao, Hongbo.(2012).A New Soil Sampling Design in Coastal Saline Region Using EM38 and VQT Method.CLEAN-SOIL AIR WATER,40(9),972-979.
MLA Yao, Rongjiang,et al."A New Soil Sampling Design in Coastal Saline Region Using EM38 and VQT Method".CLEAN-SOIL AIR WATER 40.9(2012):972-979.
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