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土壤团聚体稳定性评价方法比较
引用本文:苏静,赵世伟.土壤团聚体稳定性评价方法比较[J].水土保持通报,2009,29(5):114-117.
作者姓名:苏静  赵世伟
作者单位:苏静,SU Jing(延安大学,西安创新学院,陕西,西安,710100);赵世伟,ZHAO Shi-wei(中国科学院,水土保持研究所,陕西,杨凌,712100) 
基金项目:国家支撑计划重大项目 
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>0.25 mm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>0.25 mm团聚体的含量呈负相关性,但是平均重量直径与>0.25 mm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.

关 键 词:团聚体  分形维数  平均重量直径  >0.25mm团聚体含量
收稿时间:2008/11/20 0:00:00
修稿时间:3/8/2009 12:00:00 AM

Comparison of the Analysis Methods for Soil Aggregate Stability
SU Jing and ZHAO Shi-wei.Comparison of the Analysis Methods for Soil Aggregate Stability[J].Bulletin of Soil and Water Conservation,2009,29(5):114-117.
Authors:SU Jing and ZHAO Shi-wei
Abstract:The soil aggregates stability is one of the important factors to analyze soil structure. Soil aggregates were investigated in view of the f ractal 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 used to appraise soil structure and the fractal fraction is better than the MWD because the fractal fraction is able to reflect soil water and other properties.
Keywords:soil aggregate  fractal fraction  MWD  amount of > 0  25 mm soil aggregate
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