对9个供试土样分别用磷肥指标法和等温吸附法进行测定.结果表明,土壤的固磷强度与土壤粘粒含量、有机质含量均呈显著正相关(r分别为0.775~*、0.633~*),与速效磷含量呈极显著负相关(r=-0.918~(**)),而土壤的CaCO_3内含量、PH值与其相关不显著.磷的土壤等温吸附特征值与土壤粘粘含量呈极显著正相关(r=0.775~(**));与土壤速效磷含量则呈极显著负相关(r=-O.999~(**));与土壤有机质含量呈显著正相关(r=0.634~(*)).用两种方法估算出的磷肥施用量十分接近. Nine soil samples were measured with phosphate index method and isothermal adsorption method, respectively.The results showed that there was a significant positive correlation between soil phosphorus fixation and soil clay content and organic matter content (r = 0.775 ~ *, 0.633 ~ *) Had a significant negative correlation with available phosphorus (r = -0.918 ~ (**)), while the soil CaCO 3 content and pH had no significant correlation with soil available phosphorus. (R = 0.775 ~ (**)), and there was a significant negative correlation (r = -0.999 ~ (**)) with soil available P. There was a significant positive correlation with soil organic matter content r = 0.634 ~ (*)) .Three methods are used to estimate the amount of phosphate fertilizer is very close.