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应用同位素（３２Ｐ）示踪法研究了陕西省４种土壤（黄绵土、黑垆土、土娄土和黄褐土）的３种处理状态（风干、去ＣａＣＯ３风干和原状）磷素运移特征。结果表明，平衡方法和ＣＸＴＦＩＴ程序拟合法求出的土壤磷素运移参数，都可以较好地描述磷素运移过程的特征；由于ＣＸＴＦＩＴ程序拟合法直接应用穿透曲线拟合，还可应用于原状土壤中磷运移参数的推求，所以，与平衡法相比ＣＸＴＦＩＴ程序拟合法更优。
The characteristics of phosphorus transport in three treatments (aerated, de-CaCO 3 air-dried and undisturbed) of four soils in Shaanxi Province (loessial, black loam, loam and yellow cinnamon soil) were studied by isotope (32P) tracer method. The results show that both the equilibrium method and the soil phosphorus transport parameters calculated by the CXTFIT program fitting method can well describe the characteristics of the phosphorus transport process. Since the CXTFIT program fitting method can directly apply the penetration curve fitting method, Therefore, compared with the equilibrium method CXTFIT program fitting method is better.