干旱区地理2026，Vol.49Issue(9)：1777-1787,11.DOI:10.12118/j.issn.1000-6060.2025.595
古尔班通古特沙漠土壤水分含量与地形-植被因子关系研究
Relationship between soil moisture content and topography-vegetation factors in the Gurbantunggut Desert
摘要
Abstract
Soil moisture forms an essential component in the formation,transformation,and consumption of wa-ter resources.This study investigates soil moisture in fixed,semifixed,and mobile dunes of the Gurbantunggut Desert in Xinjiang,China.The relationship between moisture at different soil depths and topography-vegetation factors was analyzed using partial least squares structural equation model(PLS-SEM),random forest model,and Shapley additive explanations(SHAP)value analysis.The results showed that:(1)Except for soil moisture in the middle layer of semifixed and mobile dunes,the vertical distribution of moisture among dune types varied signifi-cantly.(2)Structual equation model indicated that the topography factor—height difference and vegetation fac-tor—shrub abundance—had the most pronounced impacts on soil moisture in fixed dunes;slope degree and shrub coverage were dominant factors in semifixed dunes,whereas topography and vegetation factors had relatively mi-nor effects in mobile dunes.(3)The interaction among key factors revealed that in fixed dunes,a combination of herb and shrub abundance>300 plants·m-2 and>2 plants·m-2,respectively alleviated water stress;in semifixed dunes,>200 plants·m-2 and>30%,respectively mitigated the adverse impacts of slope degree on soil moisture;in mobile dunes,maintaining herb coverage at>20%and biomass at>10 g·m-2 was necessary to enhance soil mois-ture content.These findings can help formulate refined management strategies for desertification control.关键词
古尔班通古特沙漠/土壤水分/地形-植被因子/偏最小二乘结构方程模型/随机森林模型Key words
Gurbantunggut Desert/soil moisture/topography-vegetation factors/partial least squares structural equation model/random forest model引用本文复制引用
张璐,张定海,杨甜,丘月..古尔班通古特沙漠土壤水分含量与地形-植被因子关系研究[J].干旱区地理,2026,49(9):1777-1787,11.基金项目
国家自然科学基金地区基金项目(42361016) （42361016）
内蒙古自治区防沙治沙科技创新重大示范工程"揭榜挂帅"项目(2024JB-GS0003) （2024JB-GS0003）
甘肃农业大学青年导师扶持基金(GAU-QDFC-2023-07) （GAU-QDFC-2023-07）
甘肃农业大学研究生重点课程建设项目(GAU-ZDKC-202205)资助 （GAU-ZDKC-202205）
