土壤团聚体形成的研究进展

土壤团聚体是土壤结构的基本单位,它的形成与稳定是自然过程与人类活动的综合结果,即受生物与非生物因素如土地利用方式改变、耕作和种植制度等多种因素的影响。由于团聚体的形成原因及土壤环境条件不同,不同粒级的团聚体在土壤肥力上表现出不同的性质和特征。

Progress in the Study on Soil Aggregate Formation

Soil aggregates are the basic units of soil structure, and their quantity and quality affect direcily the soil properties and fertility It has an important theoretical and practical significance in researching the change of soil fertility, effects of soil structure degradation on soil quality and control of soil structure degradation to under stand the formation,stability and change mechanism of soil aggregates.The formation and stability of soil ag gregates are the joint effects of both natural and artificial factors, that is they are affected by many biological and non-biological factors, such as the changes of land use ways, cultivation and growing systems. Soil lertlity is different from the different granularities of soil aggregates due to the different formation causes of soil aggregates and the different soil environment conditions. This paper summarizes the progress in the study on the formation mechanism of soil aggregates including the effects of non-biological cementing matters and the biological effects, mechanism of soil aggregate stability including the stability of the macro-soil aggregates and micro-soil aggregates and factors affecting the stability of soil aggregates, relationship between the soil aggregates and soil ferulity