中文摘要：

从两个方面初步探讨了有机酸对红壤磷素潜在环境风险的影响，一是有机酸对红壤固磷能力的影响，二是有机酸对红壤固定磷向液相释放的影响。研究结果表明不同类型有机酸在这两个方面的影响是不同的，以柠檬酸为代表的二羧酸可以显著减少红壤对磷的固定量，大大提高了土壤向水体释放磷的能力，增大了土磷的潜在环境风险；而以草酸为代表的三羧酸则可以不同程度上增加土壤的固磷能力，且可使已经存在于液相中的磷再次被吸附，进而减缓或消除土磷了的潜在环境风险。

英文摘要：

Potential environmental risk of phosphorus aspects： one was the change （P） of fixed P amount in red soil, in red soil as affect by organic acids was investigated in two and another was the capacity of released P amount from soil to water body. The results showed that citric acids, representative for dicaboxylic acids, significantly decreased soil fixed P amount, however enhanced the desorbable capacity of soil P from soil to water, and magnified the potential environmental risk of P in red soil. But, oxalic acid, representative for tricaboxylic acids, increased the soil fixed P amount in various degree, and it could make the P existed in solution and adsorbed by soil again, and then alleviated or eliminated the potential environmental risk of soil P.