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    浙北施家桥地区耕地表层土壤元素组合特征及影响因素分析

    The characteristics and influencing factors of element combination in cultivated surface soil of the Shijiaqiao area, northern Zhejiang Province

    • 摘要: 基于浙北施家桥地区耕地质量调查项目的成果数据,对该区的耕地表层土壤进行了加密采样分析,获得了19 项土壤元素指标数据。利用 SPSS 软件对分析结果进行了聚类分析和因子分析,结合区域地质背景和各项指标组合的地球化学特征,分析了该区耕地表层土壤元素的组合特征及其影响因素。结果表明:研究区土壤元素与吴兴区土壤背景值较接近,表层土壤总体呈酸性;表层土壤的元素含量主要受成土母质控制,其次受有机质腐殖质变质过程、岩石风化作用、水系分布以及人类生产活动影响;N、K元素含量以中等-丰富为主,P元素含量以较缺乏-中等为主,Mn元素含量相对缺乏。建议根据耕种需求对土壤进行合理的施肥,加强对局部重金属异常区的污染源控制。

       

      Abstract: Based on the data gathered from quality survey of the cultivated land in the Shijiaqiao area, northern Zhejiang Province, we sampled and analyzed the cultivated surface soil of the research area at a higher density, and obtained 19 indexes of soil elements. The study adopted SPSS to process the test results with cluster analysis and factor analysis, in combination with the regional geological background and the chemistry of indexes combinations, and concluded the combination characteristics and influencing factors of elements in cultivated topsoil. The results show that the surface soil was generally acidic and the content of elements was close to the background value of that in Wuxing District. The elements content in the surface soil were mainly influenced by parent material, followed by the process of organic humus, rock weathering, water distribution, and human production activities. The content of N and K was medium to rich in general, while the content of P was mainly deficient to medium, and Mn was relatively deficient. It is suggested to fertilize reasonably according to farming needs, and pay more attention to control pollution sources in local heavy metal anomaly areas.

       

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