感谢王奎华先生对“颗粒分析中密度计法土粒粒径计算公式研究”(以下简称原文 )的讨论和关注。现答复如下 :(1)关于颗粒形状修正问题。需用密度计进行颗粒分析的土为 0 .0 75ｍｍ筛下土。一般粒径 0 .0 75～ 0 .0 0 5ｍｍ的土颗粒主要为原生矿物 ,以类球形、多角形为主 ;粒径小 Thanks to Mr. Wang Kuihua for his discussion and attention on the “Study on the Calculation Formula of Soil Particle Diameter by Densitometry in Particle Analysis” (hereinafter referred to as the original). Now reply as follows: (1) on the particle shape correction problem. Soil densitometer required for particle analysis is 0. 0 75mm sieve soil. The general particle size of 0 .0 75 ~ 0 .0 0 5mm of the main native minerals, spherical, polygons dominated; small particle size