应用激光粒度仪分析土壤机械组成的实验研究

An Experiment Study on Employing Laser Grain-size Analyzer to Analyze Soil Mechanical Composition

土壤机械组成是最基本的土壤参数之一。探讨了应用激光粒度仪分析土壤机械组成的实验条件、检测结果与精度,并与传统的吸管法加以比较。对9个土壤样品分别用激光粒度分析和吸管法作对比测试实验,结果显示:两种方法原理的不同产生了在颗粒含量上激光粒度分析得到的粘粒含量显著低于吸管法,但是两种方法在质地分类上的结果是基本一致的。总之,运用激光粒度分析土壤机械组成是可行的。

Soil mechanical composition is an important parameter in soil science research. The paper discussed the experimental conditions,measurement results and accuracy of analyzing soil grain size with the employing the laser grain-size analyszer and then compared these features with traditional pipette and sieve analysis. The comparison results of comparison among 9 soil samples revealed that the clay contents were significantly lower using the laser grain-size analysis than those measured by pipette and sieve analysis because of their different principles. However, the classification results on soil texture by using two methods agreed well with each other. In sum, using laser grain-size analysis in studying soil mechanical composition was feasible.