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汶川地震形成了大面积的震裂带,震裂带内水土流失严重。本文重点从土壤结构体分形维数、有机质含量、土壤抗冲性三个方面探讨了北川震裂带柳杉林地土壤结构功能特性,分析了地震裂隙程度对土壤结构体分形维数、有机质含量、土壤抗冲性的影响及其与土壤深度的相关性。结果表明地震裂隙程度对土壤结构体分形维数影响不显著,而地震3 a后强度裂隙样地土壤有机质含量、抗冲性大于中度裂隙或弱度裂隙样地;各样地土壤有机质含量、抗冲性与土壤深度显著负相关,有机质含量与土壤抗冲性存在显著的正相关关系。
Wenchuan earthquake formed a large area of the rupture zone, severe water and soil loss in the rupture zone. This paper focuses on the soil structure and function characteristics of Cryptomeria fortunei forestland from three aspects of fractal dimension of soil structure, organic matter content and soil anti-scourability, and analyzes the relationship between fracturing dimension of soil structure and fractal dimension, organic matter content, Impact of Soil Impact Resistance and Its Correlation with Soil Depth. The results show that the degree of seismic fractures has no significant effect on the fractal dimension of soil structure. However, after 3 years of earthquake, the soil organic matter content and the anti-scourability of soil samples with intensity fissures are greater than that of moderate fissures or weak fissures. Soil organic matter, There was a significant negative correlation between impact resistance and soil depth. There was a significant positive correlation between soil organic matter content and soil anti-scourability.