中国水土保持科学2011，Vol.9Issue(3)：106-113,8.
土壤水稳性大团聚体测定方法综述
Review of analytical methods for aggregate size distribution and water-stability of soil macro-aggregates
摘要
Abstract
Wet-sieving method is a classical and still the most prevalent procedure for testing the water stability of soil aggregates. Three main mechanisms are attributed to the breakdown of soil aggregates during wetting including slaking (breakdown caused by the compression of entrapped air in the soil pores), differential swelling and physic-chemical dispersion. The existing wetting methods can be divided into fast wetting and slow wetting according to the velocity of wetting, and atmospheric pressure wetting and high-vacuum wetting according to the barometric condition of soil sample when wetting. When soil samples are fast wetted under atmospheric pressure, water penetrates the soil mass at a high rate along capillaries, and compressing entrapped air causes a series of miniature explosions and breaks down soil aggregates, while wetting soil samples slowly or in vacuum gives high aggregation. In order to investigate the soil aggregate size distribution and water-stability comprehensively, it is recommended that fast wetting under atmospheric pressure and slow wetting (or wetting in vacuum) should be taken respectively with equivalent soil samples. During wet-sieving, the sieves should not shake too rapidly, and the number and aperture of sieves can be selected according to analytical purpose.关键词
土壤团聚体/水稳性/粒径分布/湿筛法Key words
soil aggregates/ water-stability/ aggregate size distribution/ wet-sieving引用本文复制引用
王秀颖,高晓飞,刘和平,路炳军..土壤水稳性大团聚体测定方法综述[J].中国水土保持科学,2011,9(3):106-113,8.基金项目
国家重点基础研究发展计划课题(2007CB407204) （2007CB407204）
北京师范大学优秀博士学位论文培育基金项目(08022) （08022）
