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Geoscience ›› 2020, Vol. 34 ›› Issue (03): 609-617.DOI: 10.19657/j.geoscience.1000-8527.2020.03.17

• Geochemistry • Previous Articles     Next Articles

Study on the Genesis and Influencing Factors of Selenium-enriched Soil in the Ailaoshan Area, Xinping County, Yunnan Province

HUANG Zhao1,2(), CHEN Zheng1, XUE Chuandong2, DAO Yan1(), XU Shengchao1, DAI Dalong1, WU Song1   

  1. 1. Yunnan Institute of Geological Survey, Kunming,Yunnan 650216,China
    2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming,Yunnan 650093,China
  • Received:2019-10-25 Revised:2020-04-30 Online:2020-07-04 Published:2020-07-05
  • Contact: DAO Yan

Abstract:

Based on the evaluation results for 1∶50,000 land quality geochemical survey in Zhelong-Jiasa area of Yunnan Province, we analyze the origin of selenium-rich soil and its influencing factors.The results showed that the average of selenium in soil was 0.38 mg/kg, which was higher than national soil selenium average concentration (0.29 mg/kg).In addition, the area of the delineated selenium-enriched land accounted for 26.74% on the basis of division principle for 0.4 mg/kg<Se≤3 mg/kg.The selenium in the study area is mainly derived from the primary content of selenium in rocks and the secondary enrichment of selenium in soil, and the latter as the main reason for the widespread distribution of selenium-rich soil.Selenium content in soil is obviously affected by soil parent material, soil type, land use pattern, topography, pH value and soil organic matter.

Key words: the Ailaoshan area, selenium-enriched soil, genesis, influencing factor

CLC Number: