For each type of soil with a series of SOM contents, the desorbed P concentration has negative correlation with Xm, K and MBC, and positive correlation with DPS at each water/soil ratio.

• 随有机质含量的提高，土壤P植物有效性和P流失风险呈先降低后增强的抛物线趋势；土壤供P缓冲能力则先增强后降低。