水土保持研究2024，Vol.31Issue(1)：70-78,9.DOI:10.13869/j.cnki.rswc.2024.01.035
古尔班通古特沙漠东南部不同类型沙丘土壤水分与地形—植被因子关系
Study on the Relationship Between Soil Moisture and Topography-Vegetation Factors in Different Types of Ssand Dunes in the Southeastern Gurbantunggut Desert
摘要
Abstract
[Objective]The aim is to reveal the distribution pattern of soil moisture in the Gurbantunggut Desert and its relationship with topography-vegetation factors,which is a positive guide for formulating corresponding wind and sand control measures and establishing a scientific and reasonable plant sand fixation model.[Methods]Three different types of sand dunes(fixed,semi-fixed and mobile dunes)in the southeastern Gurbantunggut Desert were used to study the soil moisture at different depths(0-40 cm in the surface layer,40-200 cm in the middle layer and 200-200 cm in the deep layer)of four micro-landscape types(windward slope,leeward slope,mound top and mound bottom)on the three different types of sand dunes by using ANOVA and redundancy analysis.The distribution characteristics of soil moisture at different depths(0-40 cm in the surface layer,40-200 cm in the middle layer,and 200-300 cm in the deep layer)and its relationship with topography-vegetation factors were analyzed comprehensively.[Results](1)The fluctuation of soil moisture in 0-300 cm in all types of dunes gradually decreased with increasing depth,and the fluctuation of soil moisture in the surface layer was greater than that in the middle and deep layers.(2)There were significant differences in soil moisture at different depths in all types of dunes,and soil moisture was relatively more concentrated in three micro-landscape types:leeward slope,bottom of dune and windward slope.(3)Topography-vegetation factors had a negative correlation with soil moisture of most(semi-)fixed dunes in the study area,and the effect on soil moisture at different depths of(semi-)fixed dunes was more obvious than that of mobile dunes.[Conclusion]Soil moisture in all types of dunes is more strong-ly influenced by topographic factors than vegetation factors,and the main topographic-vegetation factors affecting soil moisture on different types of dunes are also different.关键词
土壤水分/影响因子/冗余分析/古尔班通古特沙漠Key words
soil moisture/influence factor/redundancy analysis(RDA)/Gurbantunggut Desert分类
农业科技引用本文复制引用
孙琰蕙,张定海,吴贤忠,张艳灵..古尔班通古特沙漠东南部不同类型沙丘土壤水分与地形—植被因子关系[J].水土保持研究,2024,31(1):70-78,9.基金项目
甘肃省科技计划项目(21JR7RA831) （21JR7RA831）
国家自然科学基金项目(41661022) （41661022）
