The application of spatial statistics on the cadmium contamination in rice around Yangze watershed
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(1.China National Center for Food Safety Risk Assessment, Beijing 100022, China;2.Guizhou Academy of Testing and Analysis, Guizhou Guiyang 550002, China;3.Institute of Geographic Sciences and Natural Resources Research, Beijing 100101,China)

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    Abstract:

    Objective Cadmium content in rice originated from Yangze watershed was analyzed with spatial statistics, which aimed to provide scientific basis for source control of grain cadmium contamination. Methods The spatial auto-correlation indicated the spatial clustering of cadmium contamination. Results The result illustrated the rice planted around Xiang River, Min River, Pei River, Tuo River, Qingyi River and Dadu River hold a higher level of cadmium content than other places. The Moran's I is 0.596 (p with statistical significance), which presented a medium spatial clustering to the rice cadmium contamination. Therefore, Xiang River and Min River watershed presented “high-high” clustering while Yachi River presented a low-low clustering. Conclusion The rice cadmium contamination around Yangze watershed emerged a medium clustering while some areas presented spatial variability.

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XIAO Ge-xin, HE Lai-ying, YANG Bing, YANG Jin-tao, YANG Da-jin. The application of spatial statistics on the cadmium contamination in rice around Yangze watershed[J].中国食品卫生杂志,2018,30(1):59-62.

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History
  • Received:January 12,2018
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  • Online: April 02,2018
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