崇义县上堡梯田土地质量地球化学评估及开发建议

Terraced Fields Land Quality Geochemical Assessment and Development Proposal in Shangbao Township,Chongyi County

基于1∶5万土地质量地球化学化学调查采样分析获得土壤重金属元素和养分元素数据,参照土壤环境质量标准(GB15618—2018)和土地质量地球化学评价规范(DZ/T 0295-2016),采用单指标评价法对上堡梯田土壤养分和土壤环境质量进行评价,并在此基础上,将两者叠加分析,对研究区进行土地质量地球化学分等。结果表明:(1)上堡梯田土地总体质量较好,以优质和良好为主,优质的土壤面积25. 34km2,占27. 51%;良好的土壤面积56. 61km2,占62. 12%;中等的土壤面积9. 5km2,占10. 31%;差等的土壤面积0. 05km2,占0. 054%,无劣等的土壤;(2)上堡梯田内大部土壤显示无公害富硒,圈定无公害富硒农业基地面积63. 26km2,无公害富锌土壤面积26. 35km2,无公害富硒富锌的土壤面积达16. 92km2,具备建立大面积无公害富硒农业基地的条件。

Based on 1∶50,000 land quality geochemical investigation sampling and analysis acquired soil heavy metal element and nutrient element data, referred soil environmental quality standard (GB15618-2018) and specification of land quality geochemical assessment (DZ/T 0295-2016, through single index assessment method carried out assessment for the Shangbao terraced fields both soil nutrient and soil environmental quality. On this basis has stacked the two to carry out land quality geochemical grading. The result has shown that: 1) as a whole, Shangbao terraced fields soil has better land quality, belongs to high quality (25.34km^2, account for 27.51%), good quality (56.61km^2, account for 62.12%), medium quality (9.5km^2, account for 10.31%), subaltern quality (0.05km^2, account for 0.054%) and without inferior quality soil;2) a majority of Shangbao terraced fields soil indicated pollution free and rich in selenium, have delineated pollution free and rich in selenium soil agricultural base area 63.26km^2, pollution free and rich in zinc soil area 26.35km^2, pollution free and rich in selenium, zinc soil area 16.92km^2, thus have possessed conditions for establishment of a large area pollution free and rich in selenium agricultural base.