Analysis of Soil Structure and Its Stability Indexes Under Typical Vegetation in Ziwuling Forest Area

LIANG Xiang-feng; ZHAO Shi-wei; HUA Juan; ZHANG Yang

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Analysis of Soil Structure and Its Stability Indexes Under Typical Vegetation in Ziwuling Forest Area

- Analysis of Soil Structure and Its Stability Indexes Under Typical Vegetation in Ziwuling Forest Area
- Bulletin of Soiland Water Conservation Vol. 27, Issue 3, Pages: 12-16(2008)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  2. 中国科学院研究生院,北京,100049
  3. 西北农林科技大学资源与环境学院, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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LIANG Xiang-feng, ZHAO Shi-wei, HUA Juan, et al. Analysis of Soil Structure and Its Stability Indexes Under Typical Vegetation in Ziwuling Forest Area[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 12-16.
DOI：

LIANG Xiang-feng, ZHAO Shi-wei, HUA Juan, et al. Analysis of Soil Structure and Its Stability Indexes Under Typical Vegetation in Ziwuling Forest Area[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 12-16. DOI：

摘要

运用分形理论

研究了子午岭林区5种天然次生植被(以6 a天然恢复弃耕地为对照)下土壤结构特征

分析了土壤水稳性团聚体分维、孔隙分维、平均重量直径等3个指标在描述土壤结构稳定性方面的差异。研究表明

相对于弃耕地

各个植被群落均能明显改善土壤结构

降低土壤水稳性团聚体分形维数

提高孔隙分形维数

增强土壤结构的稳定性。土壤水稳性团聚体分维、孔隙分维与>0.25 mm水稳性团聚体含量、土壤有机碳、容重的相关系数均达到了极显著水平

均能作为评价土壤结构稳定性的指标;而团聚体平均重量直径与土壤有机碳含量、容重相关性不显著

只与>5 mm团聚体含量和>0.25 mm团聚体含量有极显著正相关关系

因此

仅可作为大团聚体含量的评价指标。

Abstract

Based on the fractal theory

soil fractal features of five types of vegetation in the Ziwuling forest area were studied on contrast to the 6-year abandoned farmland.Results show that the aggregate fractal dimension

the pore fractal dimension

and the mean weight diameter of aggregates can indicate soil structure stability.The aggregate fractal dimension and pore fractal dimension are highly correlated to the content of 0.25 mm aggregates

the content of soil organic carbon

and soil bulk density.So they can be used as the indexes to evaluate soil structure stability.The mean weight diameter does not have significant correlations with the content of soil organic carbon and soil bulk density and however

it has significantly positive correlations with the content of 0.25 mm aggregate and the content of 5 mm aggregates.The mean weight diameter can only be used as the index to evaluate the content of large soil aggregates.As contrasted to the abandoned farmland

soil structure is improved under other four types of vegetation.

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