巢湖周围池塘沉积物中磷的赋存形态及空间差异

对巢湖周围138口池塘表层沉积物，采用沉积物磷形态标准程序（SMT）分析了其中的总磷（TP）、无机磷（IP）、有机磷（OP）、铁／铝磷（Fe／Al-P）、钙磷（Ca—P）等5种形态及各种形态磷的空间差异，并分析了不同形态磷之间的以及各种形态磷与沉积物烧失量之间的相关性。结果表明，所调查的池塘表层沉积物TP、IP、OP、Fe／Al—P、Ca—P的含量分别为536．04～3659．89、153．55～3299．15、176．68～1076．16、96．19～876．17和105．29～880．22mg／kg；巢湖周围池塘表层沉积物TP、IP、OP、Fe／Al-P、CaI-P含量高于巢湖水体表层沉积物；IP、OP、Fe／Al-P、Ca—P占TP的比重分别在13．4％～90．14％、10．86％～93．91％、8．81％～45．69％和12．86％～61．05％。巢湖流域不同区域池塘各种形态磷存在明显的空间差异，义城、三河、环城-柘皋、中珲、炯炀、槐林-盛桥等区域池塘沉积物TP和IP含量较高，而严店、沐集、黄麓、忠庙-六家畈等区域TP和IP含量较低；白山区域的池塘表层沉积物中OP含量明显低于三河、环城-柘皋等处；槐林-盛桥、炯炀区域池塘表层沉积物中Fe／Al—P含量明显高于黄麓、忠庙-六家畈区域；白山、长临的池塘沉积物中Ca—P含量明显偏高。相关分析表明，池塘表层沉积物烧失量与TP、OP、Fe／Al—P和Ca—P呈显著或极显著正相关；TP与IP、OP、Fe／Al-P和Ca—P呈极显著正相关；但OP与IP、Fe／Al-P和Ca—P无相关性。

Phosphorus Forms in Sediment of Ponds around Chao Lake and Their Spatial Variation.

Total phosphorus(TP),inorganic-phosphorus(IP),organic-phosphorus(OP),Fe/Al-bound phosphorus(Fe/Al-P) and Ca-bound phosphorus(Ca-P) in surface sediment of 138 ponds around Chao Lakes were measured,using the standard measurement and test(SMT) procedure of phosphorus forms in the freshwater sediments.And the spatial difference of phosphorus forms in pond sediment from Chao Lake watershed was also characterized.Correlation coefficients between phosphorus forms and loss of ignition were analyzed.The results show...