我们于1981年10月首次提出对石灰性土壤采用6％双氧水处理48小时后,再用中性盐偏磷酸钠振荡分散土壤,基本上解决了其它方法无法解决的土壤絮凝现象。在此基础上我们对比了国内各种比重计速测法的优缺点,制定出一个快速、简便、准确测定石灰性土壤不同颗粒组成的方法。经过10多年应用效果很好,简介如下。 We first proposed in October 1981 for 6 hours on calcareous soil treated with 6% H2O2, and then neutralized with sodium metaphosphate to disperse the soil. This basically solved the soil flocculation that could not be solved by other methods. On this basis, we compare the advantages and disadvantages of various domestic pycnometer, and develop a fast, simple and accurate method to determine the composition of different particles of calcareous soil. After 10 years of good effect, the introduction is as follows.