土壤阳离子交换量两种分析方法的比较

A Comparison Study of Two Methods for Measurement of Soil Cation Exchange Capacity

土壤阳离子交换量(CEC)是指土壤胶体所能吸附各种阳离子的总量。文章用国家标准LY/T1243-1999和US EPA Method 9081两种方法,测定420份土壤样品的CEC值并进行分析、对比。结果表明:(1)两种分析方法在实际工作中各有优缺点;(2)两种方法测得的CEC值有一定的差异。

The soil Cation Exchange Capacity（CEC） is the total amount of various cation absorbed by the soil colloids.In this paper,we used the national standard LY/T1243-1999 and US EPA Method 9081 for measurement and comparison of the CEC values of 420 samples of soil.The results showed as follows,（1）Two methods have their advantages and disadvantages;（2）There are slight differences in the resulted CEC values between the two methods.