一种实用新型土壤水稳定性大团粒分析仪的研制

土壤水稳定性大团粒是一个重要的土壤物理性质指标。土壤水稳定性大团粒分析常用的仪器为Yoder团粒分析仪。根据Yoder团粒分析仪的原理，并参照国内生产的水稳定性大团粒分析仪和荷兰的Eijkelkamp公司生产的Eijkelkamp08．13水稳定性大团粒分析仪，设计了一款实用新型的土壤水稳定性团粒分析仪。进行了改进：（1）采用了变速电机，无噪音，并可调节振动频率；（2）采用定时设置；（3）每套筛子由6个不锈钢筛组成，筛架固定在仪器下方，增加了仪器的稳定性，降低了仪器整体的重量和体积。

Development of a new type soil water-stable aggregates analysis instrument

The content of water- stable aggregates is an important soil physical parameter. And, the wet -sieve method is in common use. Based on the Yoder＇ s theory, a new type instrument of wet - sieve method was manufactured. There are several characteristics of this type instrument： （ 1 ） there are 6 sieves of different hole size, so, the disturbance of different size aggregates can be avoided, primly; （2） the sieve - holder is under the instrument, so, the stability of the instrument is advanced; （3） the frequency of sieve lift and fall can be adjusted; （4） run time can be set.