镜泊湖沉积物各形态磷分布特征及释放贡献

将镜泊湖分为北部湖区、中部湖区、东部湖区、西部湖区、南部湖区共设置23个表层沉积物采样点和10个沉积柱芯采样点，采用The Standards，Measurements and Testing Programme （SMT）法测定沉积物中总磷（TP）、无机磷（IP）、有机磷（OP）、铁/铝结合态磷（NaOH-P）、钙结合态磷（HCl-P）.分析镜泊湖沉积物各形态磷的来源、空间分布特征和对磷释放的贡献.结果表明，镜泊湖湖区沉积物各形态磷有3个主要成分，其中成分1主要代表生活污水和工业废水，主成分2主要代表农业污染，主成分3主要代表碎屑岩、自生磷灰石和含磷矿物质等；镜泊湖沉积物各形态磷的空间分布具有一定的空间差异性，分布特征受镜泊湖水文特征和人类活动影响较大.湖区沉积物各形态磷含量整体而言随深度的增加不同程度的下降；对沉积物不同形态磷的磷释放贡献进行分析，分析表明，镜泊湖各湖区沉积物短时间尺度内以滞留为主，但在长时间尺度下具有一定的释放风险.

Distribution characteristics and release contribution of different phosphorus forms in sediments of Jingpo Lake

Jingpo Lake was divided into the northern, central, eastern, western, and southern lake areas. Twenty-three surface sediment sample points and 10 sediment core sample points were installed in Jingpo Lake. The Standards, Measurements and Testing Programme (SMT) method was used to determine total phosphorus (TP), inorganic phosphorus (IP), organic phosphorus (OP), iron/aluminum combined phosphorus (NaOH-P), and calcium combined phosphorus (HCl-P) in the sediment. Researchers have analyzed the sources, spatial distribution characteristics and contribution to phosphorus release of different forms of phosphorus in Jingpo Lake sediments. The results showed that there were three main components in each form of phosphorus in Jingpo Lake sediments, of which component 1 mainly represented domestic sewage and industrial wastewater; main component 2 mainly represented agricultural pollution; main component 3 mainly represented detrital rock and authigenic apatite Stone and phosphorous minerals. The spatial distribution of different forms of phosphorus in Jingpo Lake sediments were greatly affected by the hydrological characteristics and human activities. The phosphorus content of different forms in lake sediments decreased with depth increased. Analyzed the released contribution of different forms phosphorus in sediments, the analysis showed that in a short time scale the phosphorus of sediments was staying mainly in Jingpo lake, but sediments phosphorus had release risks in a longer scale.