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| THE INVESTIGATION AND EVALUATION OF SELENIUM-RICH SOIL IN FANGSHAN DISTRICT OF BEIJING CITY |
| HUANG Qi1, CHENG Hang-xin2, CHEN Chu-xin1, WANG Hai-bo1, GUO Li1, ZHAO Dong-dong1, WANG Pan1 |
1. Beijing institute of Geological Survey, Beijing 100195, China;
2. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China |
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Abstract Based on soil pool-rich standard classification for selenium from "National A Layer Soil Background Cumulative Frequency Classification Method", the authors hold that selenium-rich soil exists in Fangshan District. Se content of soil from different physiognomies shows that the mean value of Se decreases in order of erosion accumulation platform, pluvial plain, alluvial-pluvial plain and alluvial plain, and the Se element is mostly concentrated in the top soil, and decreases rapidly toward the depth. The Se content of soil is considerably influenced by soil organic matter of mountain areas, whereas the meta-alkaline and organic matter-rich supergene environment helps to the enrichment of Se in soil. The selenium content of winter wheat and vegetations has good relationship with the soil selenium content, and is lower than the standard content stipulated in the National Specification of Food and Vegetation.
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Received: 22 November 2012
Published: 10 October 2013
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