测定土壤质地的机械分析有许多方法,目前一般多采用筛分析法、比重计法和移液管法。其中移液管法是标准的机械分析方法,但是此法的操作过程甚烦,费时很大,对于进行大量的分析工作是不够合适的。如拿比重计法和移液管法比较,二者所测的结果颇为近似,且在误差范围以内,加之比重计法操作迅速简便,便于大量分析,所以目前仍普遍采用。 根据有关参考材料和我们在实践中证明:采用比 Mechanical analysis of soil texture analysis of many ways, the current general use of sieve analysis, hydrometer and pipette method. Among them, the pipette method is a standard mechanical analysis method, but the operation of this method is annoying and time-consuming, which is not suitable for a large amount of analysis. If you take the gravimetric method and pipette method, the results measured by the two are quite similar, and within the error range, coupled with the hydrometer method is quick and easy to operate, easy to mass analysis, it is still widely used. According to the relevant reference materials and we prove in practice: adopt ratio