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应用同位素３２Ｐ示踪法，对陕西省四种主要土壤（黄绵土、黑垆土、土、黄褐土）三种处理状态下的研究得出：（１）磷素很难“穿透”土柱，阻滞因子Ｒ均大于１；富含粘粒和碳酸钙的土壤，去除ＣａＣＯ３，可使阻滞因子Ｒ减小，说明ＣａＣＯ３是与土壤磷反应的主要基质。（２）温度升高有利于土柱“阻滞”磷素，证实了磷素与土壤反应是吸热反应；（３）ＣＸＴＦＩＴ程序用于计算磷运移参数具有可行性，且该程序计算的参数是根据穿透曲线ＢＴＣ拟合而得，更能反映实际情况。
Using isotope 32P tracing method, the results of three treatments of four main soils in Shaanxi Province (loessial soil, black mulch soil, soil and yellow cinnamon soil) are as follows: (1) It is difficult for phosphorus to “penetrate” soil column , And the retardation factor R is more than 1. The soil with clay and calcium carbonate is rich in clay, and the removal of CaCO3 can reduce the retardation factor R, indicating that CaCO3 is the main matrix that reacts with soil phosphorus. (2) The increase of temperature is beneficial to “block” the phosphorus in the soil column, and it is confirmed that the reaction of phosphorus and soil is an endothermic reaction. (3) It is feasible that the CXTFIT program is used to calculate the phosphorus transport parameters, and the calculated Parameters are based on the penetration curve BTC fitting derived, better reflect the actual situation.