| 滇中武定高桥镇土地质量地球化学评价 |
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| 引用本文： | 徐杰,向经纬,王浩宇.滇中武定高桥镇土地质量地球化学评价[J].地质与资源,2022,31(2):193-200. |
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| 作者姓名： | 徐杰 向经纬 王浩宇 |
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| 作者单位： | 中国地质调查局 昆明自然资源综合调查中心, 云南 昆明 650000 |
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| 基金项目： | 中国地质调查局国土空间生态环境地质调查及修复项目 |
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| 摘 要： | 在武定县高桥镇以1.12个/km2的密度共采集453件表层土壤样品. 对重金属元素砷、铬、镉、铜、汞、铅、镍和锌做土壤环境地球化学等级评价, 最终评级为一等和二等. 一等区面积约350 km2, 占比84.95%;二等区面积约62 km2, 占比15.05%, 部分地区铜和镉显示异常但未达到污染级别. 对养分元素氮、磷、钾含量值做土壤养分地球化学等级评价, 中等以上约378 km2, 占比91.74%. 养分缺乏地块靠近人口密集区, 推测该评价单元受人为因素影响严重. 最终得到土地质量地球化学评价结果, 高桥镇土地质量相对均衡, 优质区约101 km2, 占比24.51%, 良好区约224 km2, 占比54.37%, 中等区约80 km2, 占比19.42%, 无劣等区.
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| 关 键 词： | 土地质量 重金属 养分元素 地球化学 云南省 |
| 收稿时间： | 2021-02-27 |
GEOCHEMICAL EVALUATION OF LAND QUALITY IN GAOQIAO TOWN,CENTRAL YUNNAN |
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| XU jie,XIANG jing-wei,WANG hao-yu.GEOCHEMICAL EVALUATION OF LAND QUALITY IN GAOQIAO TOWN,CENTRAL YUNNAN[J].Geology and Resources,2022,31(2):193-200. |
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| Authors: | XU jie XIANG jing-wei WANG hao-yu |
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| Institution: | Kunming Center of Natural Resources Comprehensive Survey, CGS, Kunming 650000, China |
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| Abstract: | A total of 453 topsoil samples are collected at a density of 1.12 cores per square kilometer in Gaoqiao Town of Wuding County. The heavy metal elements such as As, Cr, Cd, Cu, Hg, Pb, Ni and Zn are evaluated for soil environment geochemistry. The soil quality is assessed as first and second grades, with the first-grade area of 350 km2, accounting for 84.95%, and the second-grade area of 62 km2, making up 15.05%. Cu and Cd in some parts of the area show abnormal but do not reach pollution levels. The contents of nutrient elements such as N, P and K are evaluated for soil nutrient geochemical grading, with about 378 km2 above medium level, occupying 91.74%. The nutrient-deficient parts are close to densely-populated area, therefore it is inferred that the evaluation unit is seriously affected by human activities. From the above, the land quality geochemical evaluation for Gaoqiao Town shows a relative balance, with high-quality area about 101 km2, accounting for 24.51%, good area 224 km2 (54.37%), medium area 80 km2 (19.42%), and no inferior area. |
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| Keywords: | land quality heavy metal nutrient element geochemistry Yunnan Province |
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