磷素在作物新陈代谢和生产上占有极其重要的地位。因此,合理施用磷肥来提高作物产量,增强作物抗性和改良品质,历来为广大的土肥科学工作者和农民所注重。试验证明,湖区稻田土壤施用磷肥平均约增产5～13%。施入土壤中的磷不一定都被作物吸收,而与土壤发生了化学、物理化学和生物等变化,这些变化对施用磷肥效果有很重要的影响。影响施用磷肥效果有许多因素,其中土壤磷的形态和相对含量及磷素吸持容量是重要因素。这方 Phosphorus plays a very important role in crop metabolism and production. Therefore, the rational use of phosphate fertilizer to improve crop yields, enhance crop resistance and improve quality has always been the majority of soil and fertilizer scientists and farmers focus. Experiments show that paddy soil application of phosphate fertilizer in the lake area an average increase of about 5 to 13%. Phosphorus applied to the soil is not always absorbed by crops, but chemical, physicochemical and biological changes occur with the soil, and these changes have an important impact on the application of phosphate fertilizer. There are many factors affecting the application of phosphate fertilizer, of which the form and relative content of soil phosphorus and phosphorus holding capacity are important factors. This side