【摘要】 盆栽和培养试验结果表明：潮土、黄棕壤和红壤淹水后磷的有效性均提高，回旱后则降低，其中红壤最显著，这与土壤中Ｆｅ氧化物含量不同有关；淹水使３类土壤的磷肥肥效均降低，其顺序为红壤＞黄棕壤＞潮土；外加磷肥在潮土中主要转化为ＣａＰ，ＯＰ和ＡｌＰ，红壤中则主要转化为ＦｅＰ，ＡｌＰ和ＯＰ。更多还原

【Abstract】 Incubation method and pot experiments were carried out to study the effect of alternate submerg and drainage on the transformation and availability of phosphorus in three types of soils. The results indicated that: 1. Submerg significantly increased P availability in three types of soil and rendered the inorganic phosphate turned into more available form. After draining the fixation of phosphate was stronger in lateritic acid soil than in calcareous soil. This may be due to large amount of amorphous iron produced in the lateritic soil.2. Submerg significantly decreased added P availability in three types of soils, especially in lateritic acid soil.3. In calcareous soil the water soluble phosphate applied was mainly transformed into Ca P,O P and Al P, which in acid soil were mainly changed into Fe P, O P and Al P.Submerg increased Fe P in both soils.更多还原