不同利用方式红壤磷素积累与形态分异的研究

Study on Accumulation and Formation of Phosphorus in Red Soil Utilized by Different Ways

研究了不同利用方式红壤磷素积累、无机磷组分分异特点及各组分无机磷周年动态变化。结果表明:红壤全磷积累量表现为红壤旱地(804mg/kg)>红壤稻田(569mg/kg)>红壤茶园(459 mg/kg);红壤旱地Fe-P、A l-P、Ca2-P、Ca8-P和O-P的含量显著高于红壤稻田和红壤茶园,而Ca10-P的含量则差异不显著。施磷对所有组分无机磷周年动态变化产生影响;不同施磷方法对红壤磷素积累量以P+稻草处理>P处理>CK。积累的磷转化为各组分无机磷的转化量以Fe-P为最高,而转化率以Ca2-P、Ca8-P、A l-P较高。

Accumulation, formation characters and an.nual dynamics of phosphorus in red soil utilized by different ways were studied. The results revealed that the accumulation of total phosphorus （P） in red soil of upland, paddy and tea orchard was 804,569 and 459 mg/kg respectively. The content of Fe - P, Al - P, Ca2 - P, Ca8 - P and O - P in red soil upland was significantly higher than that in paddy and tea orchard, but Ca10 - P content in above three red soil was not significantly different. Applying phosphorus fertilizer would affect the annual dynamics of all phosphorus forms. The acc, umulation of phosphorus in different applying phosphorus treatments were P ＋ rice straw 〉 P 〉 CK in order. The amount of Fe - P transformed from accumulative phosphorus was the highest in all forms of phosphorus, while the transformation rate of Ca2 - P, Ca8 - P and Al - P was higher than that of others.