Chemical forms, availability and cycling of soil phosphorus in wetland farming systems
湿地农田土壤磷素的分布、形态与有效性及磷素循环

The investigated region is located in the centre of Jianhan plain , in the middle reach of Yangtse River, China. It is a low-lying alluvial plain influenced frequently by floods of Yangtse River. Due to water-logging and poor drainage, gleyed paddy soils are widely distributed in that area, taking about 59% of the total arable land, and deficiency in phosphorus supply is common . In order to study the chemical forms, availability and cycling of soil phosphorus in wetland farming systems in this ...