温州市农用地土壤锗元素地球化学特征、影响因素及开发利用远景评价
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P595;S132

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浙江省土地质量地质调查行动计划(2016—2020年)成果之一和温州市土地质量地质调查成果集成项目(WZHX(BJ)2019-11-315)资助。


Geochemical Characteristics, Influencing Factors and Utilization Prospect Evaluation of Ge in Agricultural Land Soils in Wenzhou, Zhejiang Province
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    摘要:

    基于浙江省土地质量地质调查行动计划(2016-2020年)和浙江省多目标区域地球化学调查成果,研究了温州市农用地表层土壤和深层土壤锗元素(Ge)地球化学特征及其主要影响因素,并对富Ge土壤开发利用远景进行了评价。结果显示,温州市农用地表层土壤Ge平均含量1.44 mg/kg,深层土壤Ge平均含量1.62 mg/kg,变异系数分别为0.14和0.10,总体分布较均匀,两者空间变化特征基本吻合,由南西到北东呈弱递减变化趋势。富集程度等级划分显示,表层土壤Ge主要以“弱贫化”和“背景”为主,指示其受人为因素影响总体较小。成土母质是影响表层土壤Ge含量及其分布特征的最重要因素,母质为滨海相沉积物和沉积岩类风化物的土壤Ge均值总体要高于河湖相沉积物和火成岩类风化物。土壤有机质、黏粒等理化指标以及土地利用方式和种植类型也是影响Ge含量的重要因素。富Ge等级划分结果显示,研究区Ge“丰富”和“较丰富”等级耕地面积1 383.07 km2,占总耕地面积的56.17%。在此基础上共圈出10个富Ge土壤开发利用远景较好的区块,并对其开发利用远景进行了评价。

    Abstract:

    Based on the results of the Action Plan of Geological Survey of Land Quality (2016-2020) and Multi-purpose Regional Geochemical Survey in Zhejiang Province, the geochemical characteristics, spatial distribution and the main influencing factors of Ge both in top and deep soils of agricultural land in Wenzhou were studied, and the utilization prospect of Ge-rich soil was evaluated. The results show that, the average contents of Ge in top and in deep soils of the study area are 1.44 mg/kg and 1.62 mg/kg respectively, with the variation coefficients of 0.14 and 0.10 respectively, Ge spatial distributions in both top and deep soils are overall uniform, sharing the same spatial variation of weakly decreasing trend from southwest to northeast. The grade division results of Ge enrichment degree shows that the topsoil of agricultural land is mainly "weak dilution" and "background", indicating that it is generally less affected by human factors. Soil parent material is the most important factor affecting the content and distribution of Ge in topsoil of agricultural land, among them, the average contents of Ge in soils with the parent material of littoral sediments and sedimentary weathered rocks are generally higher than those with the parent material of fluvial and lacustrine sediments and igneous weathered rocks. Physical and chemical indexes such as organic matter and clay content, as well as land use type and planting structure are also important factors affecting Ge content. The results of Ge-rich grade classification show that the cultivated land area of “rich” and “relatively rich” grade Ge in the study area is 1 383.07 km2, accounting for 56.17% of the total cultivated land area. On this basis, 10 blocks with good utilization prospects of Ge-rich soils are identified, and their utilization prospects are evaluated.

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王学寅,林道秀,全斌斌,耿永坡,王磊.温州市农用地土壤锗元素地球化学特征、影响因素及开发利用远景评价[J].土壤,2023,55(2):409-418. WANG Xueyin, LIN Daoxiu, QUAN Binbin, GENG Yongpo, WANG Le. Geochemical Characteristics, Influencing Factors and Utilization Prospect Evaluation of Ge in Agricultural Land Soils in Wenzhou, Zhejiang Province[J]. Soils,2023,55(2):409-418

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  • 收稿日期:2022-05-11
  • 最后修改日期:2022-06-20
  • 录用日期:2022-06-23
  • 在线发布日期: 2023-04-20
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