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| Multi scale analysis of spatial variability of heavy metals in farmland soils: Case study of soil Cd in Shunyi District of Beijing,China |
| Received:February 27, 2018 |
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| KeyWord:heavy metal in soils;Cd content;spatial heterogeneity;multi-scale;characteristic scale |
| Author Name | Affiliation | E-mail | | LIU Wei | Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
College of Geoscience and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China | | | GAO Yun-bing | Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing 100097, China
Beijing Engineering Research Center of Agricultural Internet of Things, Beijing 100097, China | gaoyb@nercita.org.cn | | ZHOU Yan-bing | Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing 100097, China
Beijing Engineering Research Center of Agricultural Internet of Things, Beijing 100097, China | | | PAN Yu-chun | Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing 100097, China
Beijing Engineering Research Center of Agricultural Internet of Things, Beijing 100097, China | | | DAI Hua-yang | College of Geoscience and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China | | | GAO Bing-bo | Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing 100097, China
Beijing Engineering Research Center of Agricultural Internet of Things, Beijing 100097, China | | | YAN Yue-guan | College of Geoscience and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China | |
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| Abstract: |
| In order to reveal the spatial heterogeneity and spatial structure characteristics of soil heavy metals, a multiscale analysis of Cd content in soil sampling data of 2007 in Beijing's Shunyi District was conducted. Using semi-variance analysis and scale analysis of variance methods, we quantitatively characterized the spatial hierarchy structure and feature scales of the spatial variations of soil Cd. The results showed that the Cd variation coefficient was 44.9% in farmland soil of Shunyi District, Beijing, and the coefficient of variation of soil Cd was moderate. The soil Cd content had strong spatial autocorrelation with a spatial multiscale structure; approximately 3.5 km and 9.6 km were two feature scales of Cd. These feature scales, which were affected by land-use intensity at small scales, were mainly influenced by soil type at large scales. The multiscale analysis method can quantitatively analyze the spatial variability of heavy metals in farmland soil and identify the dominant factors at different scales. |
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