The P sorption index(PSI)and the degree of P sorption saturation(DPSS)have been suggested as indicators for the risk of P loss from agricultural soils.

• 土壤对磷具有一定的固定能力,可以采用土壤磷吸持指数(PSI)和吸持饱和度(DPSS)来表征土壤中的磷向水体释放的风险。