Effects of patterns of land use on stability of aggregates in soil in typical small watersheds in Danjiangkou Reservoir area

LIU Fujun; HU Yujie; GUO Zhonglu; ZENG Jianhui; LI Dongyao; XIAO Zhiyuan

doi:10.13300/j.cnki.hnlkxb.2025.04.011

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Effects of patterns of land use on stability of aggregates in soil in typical small watersheds in Danjiangkou Reservoir area

Resources and environment | 更新时间：2026-11-05

- Effects of patterns of land use on stability of aggregates in soil in typical small watersheds in Danjiangkou Reservoir area
- Journal of Huazhong Agricultural University Vol. 44, Issue 4, Pages: 113-121(2025)
- 作者机构：
  
  华中农业大学资源与环境学院，武汉 430070
- 作者简介：
- 基金信息：
- DOI：10.13300/j.cnki.hnlkxb.2025.04.011
  CLC： S152;S153.6
- Received：14 July 2024，
  
  Published：05 July 2025
- 稿件说明：
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刘福君，胡玉洁，郭忠录，等.丹江口库区典型小流域不同土地利用方式对土壤团聚体稳定性的影响［J］.华中农业大学学报，2025，44（4）：113‐121.

LIU Fujun,HU Yujie,GUO Zhonglu,et al.Effects of patterns of land use on stability of aggregates in soil in typical small watersheds in Danjiangkou Reservoir area[J].Journal of Huazhong Agricultural University,2025,44(04):113-121.
刘福君，胡玉洁，郭忠录，等.丹江口库区典型小流域不同土地利用方式对土壤团聚体稳定性的影响［J］.华中农业大学学报，2025，44（4）：113‐121. DOI： 10.13300/j.cnki.hnlkxb.2025.04.011.

LIU Fujun,HU Yujie,GUO Zhonglu,et al.Effects of patterns of land use on stability of aggregates in soil in typical small watersheds in Danjiangkou Reservoir area[J].Journal of Huazhong Agricultural University,2025,44(04):113-121. DOI： 10.13300/j.cnki.hnlkxb.2025.04.011.

摘要

为探讨不同土地利用方式和不同破碎机制对土壤团聚体稳定性差异的影响，以丹江口库区五龙池流域为例，通过野外调查、实地采样和室内分析，探讨不同土地利用方式（林地、灌木林、坡耕地和梯田）对土壤理化性质和团聚体稳定性的影响。结果显示：土壤有机质（SOM）、全氮（TN）、黏粒（clay）、粉粒（silt）和孔隙度（porosity）在不同土地利用方式上具有显著差异，坡耕地土壤有机质和全氮含量均高于梯田土壤；林地有机质含量最高，全氮含量最低，灌木林与之相反；坡耕地和梯田土壤黏粒与粉粒含量大于林地和灌木林土壤；有机质、容重和孔隙度在不同土壤深度上有显著差异，坡耕地和梯田土壤孔隙度小于灌木林土壤。随着土壤深度的增加，土壤有机质含量和孔隙度降低，容重增加。土壤团聚体平均质量直径（MWD）和土壤结构稳定性指数（SSI）受土地利用方式的显著影响。SSI表现为林地

灌木林

坡耕地

梯田，SSI值均大于7%，土壤结构退化风险较低。所有样品的快速湿润（MWD

）、预湿润振荡（MWD

）和慢速湿润（MWD

）分别为0.28~2.20、0.83~2.44、0.41~2.30 mm。林地土壤团聚体稳定性最高，梯田土壤团聚体稳定性最差。4种土地利用方式团聚体的平均质量直径从大到小均为MWD

、MWD

，表明研究区土壤团聚体的破坏主要是由消散作用导致的。路径分析结果显示，有机质对团聚体稳定性呈显著正向影响，且路径系数最大。而全氮与团聚体稳定性呈显著负向影响作用。结果表明，土地利用主要通过影响有机质、全氮、黏粒、孔隙度和粉粒间接影响土壤团聚体稳定性。

Abstract

Soil erosion is a key driving factor leading to the degradation of soil quality， and the stability of aggregates in soil is an important indicator for measuring soil quality. Changes in patterns of land use may affect structural substances such as aggregates in soil and the physicochemical properties of soil related. Wulongchi watershed in Danjiangkou Reservoir area was used to study the effects of different patterns of land use including woodland， shrub land， slope farmland and terrace on the physicochemical properties of soil and the stability of aggregates in soil via field investigation， on-site sampling， and indoor analyses. The Le Bissonnais method was used to determine the stability of aggregates in soil. The results showed that there were significant differences in soil organic matter（SOM）， total nitrogen（TN）， clay， silt， and porosity among different patterns of land use（

0.05）. The content of SOM and TN in slope farmland was higher than that in terrace. Woodlands had the highest content of organic matter and the lowest content of total nitrogen， whereas shrub land showed the opposite trend. The content of clay and silt in soil in slope farmland and terrace was higher than that in soil in woodland and shrub land. There were significant differences in SOM， bulk density（BD） and porosity among soils with different depths（

0.05）. The porosity in soil in slope farmland and terrace was smaller than that in shrub land. SOM and Porosity decreased and BD increased with the increase in the depth of soil. The mean weight diameter（MWD） of aggregates in soil and structure stability index （SSI） of soil were significantly affected by the pattern of land use（

0.05）. SSI was in the decreasing order of woodland

shrub land

slope farmland

terraced， with SSI values all greater than 7%， indicating a low risk of structural degradation in soil. The MWD

， MWD

and MWD

of all samples was 0.28-2.20，0.83-2.44

and 0.41-2.30 mm， respectively. The stability of aggregates in soil in woodland was the highest， while the stability of aggregates in soil in terrace was the worst. The average weight diameter of aggregates in soil for the four patterns of land use among the three treatments of Le Bissonnais method was in the decreasing order of MWD

MWD

， indicating that the destruction of aggregates in soil in the studied area is mainly caused by dissipation. The results of path analysis showed that SOM had a significantly positive effect on the stability of aggregates in soil， with the highest path coefficient. TN had a significantly negative effect on the stability of aggregates in soil. Patterns of land use indirectly affected the stability of aggregates in soil mainly by affecting the SOM， TN， clay， poesity， and silt. It will provide reference for protecting the ecology and environment in the Danjiangkou Reservoir area and guaranteeing the safety of water quality in the water source area of South-to-North Water Diversion Project.

关键词

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references

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