本文测定了几种用蛭石培养的作物幼苗对NO- 3 的吸收动力学参数 ,着重对测定方法、要求和数据处理方法进行了初步探讨 .结果表明 ,为使所测参数真实可靠 ,应做到作物根系能在限定时间内吸收足够多的离子 ,吸收系列处理数不小于 8,应该用米氏方程的两种变换式同时对数据进行处理并用相关系数对测得参数的精度作出评价等 In this paper, the kinetic parameters of NO-3 absorption in seedlings of several crops cultured with vermiculite were measured, and the methods of determination, requirements and data processing methods were preliminarily discussed. The results showed that in order to make the measured parameters true and reliable, To the crop roots can absorb enough ions within a limited time, the number of absorption series processing is not less than 8, the two transformations of the Mie equation should be used to process the data at the same time and use the correlation coefficient to evaluate the accuracy of the measured parameters