土壤团聚体稳定性评价方法比较  

Comparison of the Analysis Methods for Soil Aggregate Stability

作　　者：苏静[1] 赵世伟[2] 

机构地区：[1]延安大学西安创新学院,陕西西安710100 [2]中国科学院水土保持研究所,陕西杨凌712100

出　　处：《水土保持通报》2009年第5期114-117,共4页Bulletin of Soil and Water Conservation

基　　金："十一五"国家支撑计划重大项目(2006BCA01A07;2006BAD09B08)

摘　　要：土壤团聚体稳定性是评价土壤结构和土壤物理形状的重要指标。对土壤团聚体分形维数、土壤团聚体平均重量直径和>0.25mm团聚体含量3种土壤团聚体结构评价的方法进行了探讨。结果表明,分形维数与>0.25mm团聚体的含量呈负相关性,但是平均重量直径与>0.25mm团聚体的含量有正的相关性。这三种方法都能应用来评价土壤结构,但是分形维数不仅表示土壤结构,还能说明土壤水分和土壤其它的物理性质。因此,分形维数是评价土壤结构的较好的方法。The soil aggregates stability is one of the important factors to analyze soil structure.Soil aggregates were investigated in view of the fractal fraction,the amount of >0.25 mm aggregates and the aggregate weight dimension(MWD).Results showed that there was a negative correlation between the fractal fraction and the amount of >0.25 mm aggregates.On the contrary there was a positive correlation between the MWD and the amount of <0.25 mm aggregates.This indicates that the fractal fraction and the MWD can be u...

关 键 词：团聚体 分形维数 平均重量直径 >0.25mm团聚体含量 

分 类 号：S15[农业科学—土壤学]