【摘要】 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。更多还原

【Abstract】 By using the 32P isotopic tracer method, experiments have been conducted toinvestigate phosphorus transport in three different forms of four types of soils inShaanxi Province. It is found that: (1) Phosphorus can hardly break through the soilcolumn in experiment as the retardation factor, R, is larger than 1 in most cases,particularly in soils rich in clays and calcium carbonate. After eliminating CaCO3 fromthe soil, the value of R will decrease. (2) While raising temperature makes the valueof R increase and the value of diffusion-dispersion coefficient, D, decrease; and (3) Itis viable to use the CXTFIT program for calculation of phosphorus transportparameters.更多还原