A Comparison Study on the Methods of Inorganic Phosphate Fractionation in Main Upland Field

A study of the comparison between the method of inorganic phosphate fractionation in main upland field of Hunan province was carried out, and two other methods,the inorganic phosphate fractionation method proposed by Zhang Shoujing and Jackson and the improved inorganic phosphate fractionation method for calcareous soil proposed by Gu Yichu and Jiang Baifan were studied.The results show that the method proposed by Zhang and Jackson was adaptable only for the acid upland field,while the method proposed by Gu Yichu and Jiang Baifan was not only adaptable for neutral and calcareous upland field but also for acid upland field.