One of the key targets for soil fertility improvement is to activate the nutrient,which could reduce the input of resources and also the risks of environmental pollutions.Due to the low soil organic carbon(C)content and low phosphorus(P)fertilizer use efficiency in many peanut fields,rational field management is critical for improve soil C&P fertility.In previous study,we have confirmed that soil organic carbon(SOC)accumulation increased the soil available P and the ratio of soil available to total P under long-term P and no-P fertilizations.