摘要
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 the scientific basis for the governance of Tien Lake. The experiment was conducted to investigate different types of surface soiI phospho-rus in Tien Lake Basin, the author malnIy studied the evoIution and the accumuIa-tion characteristics of the surface soiI phosphorus in Tien Lake Basin. The resuIts showed that: The content of surface soiI total phosphorus, OIsen-P and water soIu-bIe phosphorus in Tien Lake was significant accumuIated over the past 20 years. The content of total phosphorus, OIsen-P and water soIubIe phosphorus in different Iand utiIization types showed the same sequence: greenhouse soi〉arabIe soi〉buiIt-up area soi〉woodIand soiI. The content of soiI total phosphorus, OIsen-P and water soIubIe phosphorus was signal y reIevant. The content of soiI phosphorus in Tien Lake Basin had reached the IeveI of very rich, the accumuIation characteristic of phosphorus was obvious and there was a high risk of phosphorus poI ution.
基金
Supported by the Science and Technology Major Projects of Tien lake of National Water Pollution Control and Management"Integrated Control and Water Conservation Forest protection Key Technology and Engineering Demonstration of Agricultural Non-point Source Pollution in Tien Lake Basin"(2012ZX07102-003)
Applied Basic Research Major Projects of Yunnan Province"The Research on Phosphorus Supergene Migration and Aquatic Organisms Response of Tien Lake"(2009CC006)~~
关键词
滇池
土壤
磷素
演变
积累
Tlen Lake
soli
phosphorus
evoIutlon
accumulatlon