Phosphorus (P) is the limiting factor for agricultural production in red soil regions,so the study about P forms and transports can be meaningful to agricultural production in red soil regions.The forms and contents of phosphorus by upland red soils different in fertilization were studied with the P fractionation method proposed by Hedley.The results show: 1) All the inorganic P and most of the organic P are always lower in soil not fertilized with inorganic or organic phosphorus than in soil fertilized with phosphorus.2) Resin-P and NaHCO3-P that can be utilized by plant easily are tiny,but P combined with ferric and aluminium and Residual-P are the greatest parts in upland red soil.So the P availability in red soil is low.3) NaHCO3-Pi,Pi combined with ferric and aluminium,Po existed in soil aggregates are the most contributive forms to available P(Bray=P).In a word,these results guide us to research on P availability and transformation of phosphorus by upland red soils different in fertilization.And then,they can be theoretical and practical guidance for phosphorus managment in upland red soil.
杨芳,何园球,李成亮,徐江兵,林天.不同施肥条件下红壤旱地磷素形态及有效性分析[J].土壤学报,2006,43(5):793-799. DOI:10.11766/trxb200507120513 Yang Fang, He Yuanqiu, Li Chengliang, Xu Jiangbing, Lin Tian. EFFECT OF FERTILIZATION ON PHOSPHORUS FORMS AND ITS AVAILABILITY IN UPLAND RED SOIL[J]. Acta Pedologica Sinica,2006,43(5):793-799.复制