关于土壤孔隙度测定的商榷  

Discussion on the Determination of Soil Porosity

作　　者：刘多森[1] 

机构地区：[1]中国科学院南京土壤研究所,江苏南京210008

出　　处：《土壤通报》2004年第2期152-153,共2页Chinese Journal of Soil Science

摘　　要：束缚水的密度>lgcm-3,而且在饱和水和毛管水中不能忽略束缚水占有的重量。1g最大束缚水占据的平均体积≈0.776cm3。因此,饱和水的克数不能视为毫升数,最大毛管水的克数也不能视为毫升数。如果把该克数视为毫升数,那么总孔隙度和毛管孔隙度的测定将有不可接受的误差,而且测定结果高于真值。The density of bound water > 1g cm^(-3),and the weight occupied by the bound water cannot be neglected in saturated water and capillary water. The mean volume occupied by l gram of maximum bound water is about 0.776cm^(-3). Therefore, the grams of saturated water cannot be regarded as the cubic centimeters, and neither can the grams of maximum capillary water be regarded as the cubic centimeters. If the grams are regarded as the cubic centimeters, then the determination of total porosity and capillary porosity will have an unacceptable error ,and the determination results are higher than the true values.

关 键 词：土壤孔隙度 饱和水 密度 体积 毫升数 

分 类 号：S152.5[农业科学—土壤学]