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Position: Home > Articles > Aggregate Formation Mechanism of Soil Developed from Dolomite Guizhou Agricultural Sciences 2014 (3) 87-90

白云岩发育形成土壤团聚体的机制

作  者:
罗美;周运超
单  位:
贵州大学;贵州财经大学
关键词:
白云岩;土壤团聚体;形成机制;胶结剂
摘  要:
为探明白云岩发育形成土壤团聚体机制,了解石漠化的发生情况,采用拆分方法对白云岩发育形成土壤的各级团聚体进行了测定。结果表明:白云岩发育形成土壤团聚体的机制为胶结剂先把小颗粒胶结成小团聚体,再由胶结剂进一步将小团聚体和细小的颗粒胶结形成更大的团聚体,而胶结剂中游离氧化铁铝是白云岩发育形成土壤团聚体最主要的作用力,尤其表现在>5mm的团聚体颗粒上,可达89%的作用,而随着粒径的减小,其作用力减弱,但仍然达57.2%;随着粒径的减小,胶结剂胡敏酸的作用力逐渐增大,碳水化合物的作用变弱,大团聚体中有机胶结剂胡敏酸和碳水化合物的作用力近似;活性Ca2+、Mg2+的作用不大。
译  名:
Aggregate Formation Mechanism of Soil Developed from Dolomite
作  者:
LUO Mei;ZHOU Yunchao;Guizhou University of Finance and Economics;Guizhou University;
关键词:
dolomite;;soil aggregate;;formation mechanism;;grouting agent
摘  要:
The various aggregates of soil developed from dolomite were detected by split method to explore aggregate formation mechanism and the occurrence situation of stony desertification.The results showed that aggregate developed from small particle glued,then small aggregates combined small particles and small aggregates to become larger aggregates.The main glue was dissociated Fe2O3 and Al2O3, especially larger than 5 mm aggregate which could contribute more than 89%,although as particle size changed from large to small the contribution of Fe2O3 and Al2O3 changed from 89% to 57.2%,the contribution was more than half.Particle size changed to become smaller,humic acid was of more contribution but active carbonhydrate was of less,and the same contribution was found at the largest aggregate.The contribution of active Ca2+and Mg2+was small.

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