水土保持研究2025，Vol.32Issue(4)：59-67,9.DOI:10.13869/j.cnki.rswc.2025.04.025
黄土丘陵沟壑区土壤大孔隙特征变化及其影响因素
Changes in soil macropore characteristics and its influencing factors in loess hilly and gully region
摘要
Abstract
[Objective]This study aims to explore the changes of soil macropore characteristics under vegetation restoration in the loess hilly and gully region,providing a reference for further understanding the mechanism of soil macropores' influence on water infiltration.[Methods]In the Zhifang Gully small watershed,long-term cultivated farmland and grassland,shrubland,and woodland with different restoration years were selected for the study.CT scanning technology was used to quantify soil macropore characteristic parameters,and the key factors influencing macropore development were analyzed.[Results]Soil macropore parameters of grassland,shrubland and woodland were superior to those of farmland.Woodland had significantly higher macroporosity and equivalent diameter than other vegetation types(p<0.05),and its macropore structure was better than that of grassland and shrubland.The soil macropore structure of grassland and woodland improved gradually with longer restoration years,while the improvement of shrubland was relatively insignificant.Macroporosity exhibited a significant positive correlation with both the root average diameter and root volume density(p<0.05).The number of soil macropores also showed a significant positive correlation with soil organic matter(p<0.05).[Conclusion]Vegetation restoration is beneficial for improving the soil macropore structure,and soil organic matter and plant root characteristics play a significant role in promoting the development of soil macropores.关键词
黄土丘陵沟壑区/植被恢复/土壤大孔隙/CT扫描Key words
loess hilly and gully region/vegetation restoration/soil macropores/CT scanning分类
农业科学引用本文复制引用
张睿惇,马宏红,高鹏,艾旭城,温永福..黄土丘陵沟壑区土壤大孔隙特征变化及其影响因素[J].水土保持研究,2025,32(4):59-67,9.基金项目
国家自然科学基金"黄土区植被恢复驱动下土壤优先流变化及其对坡面产流过程的影响机理"(42277354) （42277354）
