内蒙古鄂伦春旗东部地区土地质量地球化学评价

    Geochemical evaluation of land quality in eastern Oroqen Qi, Inner Mongolia

    • 摘要: 基于鄂伦春旗东部地区3 000 km2 1:25万土地质量地球化学调查获取的土壤养分和土壤环境数据,参照DZ/T 0295《土地质量地球化学评价规范》和GB15618《土壤环境质量 农用地土壤污染风险管控标准(试行)》,对研究区土壤养分丰缺情况和环境质量进行评价. 结果表明:研究区土壤养分以一等(丰富)和二等(较丰富)为主,分别占研究区面积的75.1%和24.4%,尚无养分四等(较缺乏)和五等(缺乏)土壤存在,其中B、Cu、Mg以五等(缺乏)为主;土壤环境质量以一等(无风险)为主,占97%以上,土壤Zn、Hg、Pb全区均为一等(无风险)等级;土地质量地球化学综合等级以一等(优质)为主,面积为2 920 km2,占总面积的97.34%. 本研究可为鄂伦春旗农业经济高质量发展提供地质数据支撑.

       

      Abstract: Based on the soil nutrient and environmental data obtained from the 1:250 000 geochemical survey of land quality covering 3 000 km2 in eastern Oroqen Qi, this study evaluates the soil nutrient abundance/deficiency and environmental quality in accordance with DZ/T 0295"Specifications for Geochemical Evaluation of Land Quality" and GB15618 "Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land (Trial)". The results show that soil nutrient in the study area is predominantly assigned as Grade I (abundant) and Grade II (relatively abundant), accounting for 75.1% and 24.4% of the total area respectively. No Grade IV (relatively deficient) or Grade V(deficient) nutrient soils are identified yet, although B, Cu and Mg are deficient. The soil environmental quality is primarily classified as Grade I (risk-free), covering over 97% of the area, with Zn, Hg and Pb concentrations maintaining risk-free grade throughout the region. The comprehensive geochemical land quality is mainly Grade I (excellent), encompassing 2 920 km2 or 97.34% of the total area. This study may provide geological data support for promoting high-quality agricultural economic development in Oroqen Qi.

       

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