ANALYSIS OF POROSITY IN A TILLED CRUSTING SOIL IN ZIMBABWE

被引：14

作者：

BRUAND, A

DACQUI, LP

NYAMUGAFATA, P

DARTHOUT, R

RISTORI, GG

机构：

[1] CNR,CTR STUDIO COLLOIDI SUOLO,I-50144 FLORENCE,ITALY

[2] UNIV ZIMBABWE,DEPT SOIL SCI,HARARE,ZIMBABWE

来源：

GEODERMA | 1993年 / 59卷 / 1-4期

关键词：

D O I：

10.1016/0016-7061(93)90071-R

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Samples were collected in a tilled ''crusting soil'' from zones with different structures and their porosity was analysed with mercury porosimetry. The results showed three types of elementary pore volumes that differ in both the size and origin of the pores. The first type of elementary pore volume results from the packing of clay particles, and the second one mainly arises from the packing of silt and sand particles with the porous clay fraction. Their variations are mainly related to the clay content. The third elementary pore volume is related to tillage and biological activity, but there is no close relationship between its variation and the type of structure. These results obtained with mercury porosimetry are consistent with observations on thin-section images, using scanning-electron microscopy with backscattered electrons.

引用

页码：235 / 248

页数：14

共 24 条

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