农田土壤潜在有效磷的转化与利用研究进展

Research Progress in Transformation and Utilization of Soil Potential Available Phosphorus in Farmland

农田土壤潜在有效磷是一个巨大的磷素资源库,这部分磷素不能被作物直接吸收利用,但可以缓慢释放,释放出来的磷素相当于缓效磷;在磷资源快速耗竭、磷肥利用率低的背景下,如何协调好磷素储存与利用之间的关系,是农田土壤养分管理过程中提高土壤潜在有效磷利用率的关键。为农田土壤磷素管理和合理利用提供依据,从转化机制、影响因素和高效利用措施等方面对农田土壤潜在有效磷的转化与利用研究进展进行了概述,并对下一步研究进行了展望。

Potentially available phosphorus(P)is one huge P resource bank in farmland soils.These P cannot be directly absorbed and utilized by crops,but can be released slowly,which is equivalent to slow-releasing P.Under the backgrounds of rapid P resource depletion and low P fertilizer use efficiency,improving the utilization of soil potentially available P and solving the coordination problem between storage and utilization of P is a difficult problem in rational farmland soil nutrient management.To provide basis for management and rational utilization of phosphorus in farmland,the research progress on conversion and utilization of potential available phosphorus in farmland soil was summarized from the aspects of transformation mechanism,influencing factors and efficient utilization measures.The prospect and suggestion of the next step research were made at last.