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| 基金项目：江苏省自然资源保护利用专项资金（矿地融合试点）项目“扬州市江都区邵伯镇土地质量地质调查与资源环境综合评价试点”（苏财资环〔2020〕53号） |
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| 摘要： |
| 江苏天然特色土地资源开发利用主要围绕富硒土地展开，而关于富锌等特色土地的开发利用与研究基本处于空白状态。在1∶10 000土壤地球化学调查的基础上，开展了江淮冲积平原典型地区天然富锌土地资源分区及开发潜力评价，结果表明：研究区部分土壤Zn含量明显高于周边区域，最高达227 mg/kg，圈定的绿色和一般富锌土地范围分别为11.81、8.75 km2，小麦富锌率分别为42.8%、25.0%；土壤全Zn与Cu、Cr、有机质、Co、V、Ni等存在正相关性，与Ca存在负相关性，表明土壤全Zn含量可能受到这些元素的共同影响；小麦Zn含量受土壤pH值及有机质、Ca、Cr、有效铜含量等多种因素叠加制约；耕作层Zn主要来源于第四系特殊沉积环境，排除人为因素。研究区土壤有机质较丰富、pH值较低，土地综合质量较好，天然富锌区成片分布，具有开发天然富锌农作物的潜力。研究成果为指导当地特色富锌农产品的开发、优化农业种植结构、促进土地可持续利用提供科学依据。 |
| 关键词：富锌土壤 有机质 江淮冲积平原 江苏 |
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| Abstract: |
| The development and utilization of natural characteristic land resources in Jiangsu Province have primarily focused on selenium-rich land, whereas the exploitation and investigation of other characteristic types, such as zinc-rich land, remain largely unexplored. Based on a 1∶10,000 scale soil geochemical survey, this study conducted zoning of naturally zinc rich land resources and evaluated their development potential in a typical area of the Jianghuai Alluvial Plain. The aim is to provide a scientific basis for guiding the development of characteristic zinc rich agricultural products, optimizing local agricultural cropping structures, and promoting sustainable land use. The results indicate that soil zinc concentrations in parts of the study area are significantly higher than those in surrounding regions, reaching a maximum value of 227 mg/kg. The delineated areas of green (pollution-free) and general zinc-rich land are 11.81 km2 and 8.75 km2, respectively, with corresponding zinc enrichment rates in wheat grains of 42.8% and 25.0%. Total soil Zn exhibits positive correlations with Cu, Cr, soil organic matter, Co, V, and Ni, and a negative correlation with Ca, suggesting that soil Zn content may be jointly influenced by these geochemical factors. Zinc content in wheat is constrained by multiple overlapping factors, including soil pH value, organic matter content, Ca content, Cr content, and available Cu content. Zinc in the plough layer is primarily derived from specific Quaternary sedimentary environments, excluding significant anthropogenic contributions. The soils in the study area are characterized by relatively high organic matter content, low pH value, and good overall land quality. The naturally zinc-rich zones exhibit a contiguous distribution pattern, indicating promising potential for the development of naturally zinc-rich agricultural products. |
| Keywords:zinc rich soil organic matter Jianghuai Alluvial Plain Jiangsu Province |
| 胡秀艳,孙 全,景 山,等.江淮冲积平原典型地区天然富锌土地资源及开发潜力评价[J].地质学刊,2026,50(2):189-197 |
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