土壤学报2025，Vol.62Issue(5)：1282-1293,12.DOI:10.11766/trxb202408270344
亚热带崩岗侵蚀区不同植被恢复类型对土壤团聚体孔隙特征的影响
Effects of Different Types of Vegetation Restoration on Soil Pore Characteristics in Benggang Erosion Areas
摘要
Abstract
[Objective]This study aimed to investigate the impact of different vegetation restoration types on soil pore characteristics in Benggang areas.[Method]Surface soil samples were collected from four vegetation-restored lands(artificial arbor,artificial forest,artificial shrubland,and artificial grassland)in the Benggang erosion area and an unplanted site was selected as the control(eroded land).The pore characteristics of the aggregates(3～5 mm)were visualized and quantified using X-ray microcomputed tomography(μCT)at a voxel resolution of 5.91 μm.Following the imaging,we measured various physical soil hierarchies,including bulk density,aggregate size distribution,and mechanical composition across multiple scales.[Result]The results indicated that vegetation restoration significantly improved the formation and stability of soil aggregates,leading to notable changes in aggregate pore characteristics and characterized by high anisotropy and fractal dimension.This suggests that different vegetation types not only influence the physical properties of the soil but also enhance its ability to retain water and nutrients,thereby contributing to overall soil structure.The aggregate pore size distribution varied among the different revegetated sites,reflecting the influence of specific environmental conditions and management practices associated with each type of vegetation.The Soil Structure Index(SSI)was used to assess the overall quality of soil structure.The findings revealed that,except for artificial grassland,the SSI values were consistently higher for all vegetation-restored lands compared to the eroded land.The ranking of SSI values followed artificial arbor(0.66)>artificial forest(0.60)>artificial shrubland(0.48)>eroded land(0.31)>artificial grassland(0.25).This hierarchy underscores the significant benefits of arboreal woodlands,particularly citrus orchards,in enhancing soil structure and stability.[Conclusion]Overall,the results of this study underscore the critical role of vegetation restoration in promoting ecological recovery and improving soil quality in the Benggang erosion areas of South China.By demonstrating the positive impacts of different vegetation types on soil aggregate pore characteristics,this research provides valuable insights for land management and ecological restoration efforts.Future studies could expand on these findings by exploring the long-term effects of various restoration practices on soil health and erosion control,thereby contributing to more effective strategies for sustainable land use and environmental conservation.关键词
崩岗/显微CT扫描/团聚体孔隙特征/土壤结构指数/土壤侵蚀Key words
Benggang/Microcomputed tomography/Aggregate pore characteristics/Soil structure index/Soil erosion分类
农业科学引用本文复制引用
王乾坤,张歆,杨伟,彭珏,王军光..亚热带崩岗侵蚀区不同植被恢复类型对土壤团聚体孔隙特征的影响[J].土壤学报,2025,62(5):1282-1293,12.基金项目
国家自然科学基金项目(42177317)和湖北省水利重点科研项目(HBSLKY202304)资助 Supported by the National Natural Science Foundation of China(No.42177317)and the Key Scientific Research Projects of Water Resources of Hubei Province(No.HBSLKY202304) （42177317）
