The parabola diffusion equation (Ct = a + btl/2) gave a best description of the kinetics of Ca adsorption in the soil. Ca adsorption velocity in various treatments appeared in the sequence of Ca + B > Ca + Zn+B > Ca > Ca+Zn.

• 土壤吸附钙的动力学以抛物线扩散方程(Ct=a+bt1/2)描述最佳,其过程受扩散机制的制约,吸附速率以Ca+B>Ca+B+Zn>Ca>Ca+Zn。