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为了提供滇池富营养化治理的科学依据,本研究以滇池流域不同类型的表层土壤磷素为研究对象,主要研究了滇池流域表层土壤磷素的演变与累积特征。结果表明,近20年滇池流域表层土壤全磷、速效磷和水溶性磷的含量均随时间的推移而显著累积;不同土地利用类型,土壤全磷、速效磷和水溶性磷含量顺序一致,均为:大棚土壤>耕地土壤>建城区土壤>林地土壤,土壤全磷、速效磷和水溶性磷之间含量存在显著相关性。滇池流域土壤磷素含量都已经达到了极丰富水平,累积特征明显,磷污染风险很高。
In order to provide a scientific basis for the eutrophication control in Dianchi Lake, this study took different types of surface soil phosphorus in Dianchi Lake as the research object, mainly studied the evolution and accumulation of phosphorus in the surface soil of Dianchi Lake. The results showed that the content of total phosphorus, available phosphorus and water-soluble phosphorus in surface soil of Dianchi Lake Basin in recent 20 years all significantly increased over time. The contents of total phosphorus, available phosphorus and water-soluble phosphorus in different types of land use were the same As follows: greenhouse soil> arable land soil> ancillary area soil> there was a significant correlation between the content of total phosphorus, available phosphorus and water-soluble phosphorus in forest soils. The phosphorus content of soil in Dianchi Lake basin has reached a very rich level, with obvious cumulative characteristics and high phosphorus pollution risk.