中国水土保持科学2025，Vol.23Issue(1)：140-149,10.DOI:10.16843/j.sswc.2023061
蒙东黑土区坡耕地退化现状分析
Status analysis of sloping cropland degradation in the black soil region of eastern Inner Mongolia
摘要
Abstract
[Background]Black soil area in eastern Mongolia is an important commercial grain base in Inner Mongolia Autonomous Region.Soil degradation seriously affects regional food security and sustainable use of black soil.To clarify the degradation status of sloping cropland is the premise of comprehensive management and improvement of black soil.[Methods]Selected Moqi as the study area,sloping cropland as the research object,based on the soil measurement data,minimum data set,sequential Gaussian simulation,and mathematical statistics methods,we analyzed the spatial distribution of the degradation degree of sloping cropland in this region,the forms and the driving factors of degradation.[Results]1)The minimum data set of assessment system on soil degradation degree included:Soil organic matter,A-horizon thickness,large water-stable aggregate,pH,slope,and ridge-slope angle.2)The soil degradation index of sloping cropland in this region ranges from 0.081 1-0.799 8.The slightly degraded and moderately degraded sloping cropland accounted for 83%of the total sloping cropland area.3)The correlation between soil degradation index and A-horizon thickness was the highest(P<0.01),were positively correlated with slope and ridge-slope angle(P<0.05),the correlation coefficient between slope and ridge-slope angle was 0.356(P<0.05).[Conclusions]The degradation degree of sloping cropland gradually increased from northeast to southwest in study area,mainly with slightly degraded and moderately degraded sloping cropland.The loss of A-horizon layer and the reduction of cultivated area were primary characters.The interaction between slope and ridge-slope angle might be the driving factors leading to the degradation of sloping cropland.The results can provide data support for the prevention and control of sloping cropland degradation in the black soil area of eastern Inner Mongolia.关键词
坡度/垄坡角/腐殖质层厚度/土壤退化指数/评价指标体系Key words
slope gradient/ridge-slope angle/A-horizon thickness/soil degradation index/evaluation index system分类
农业科技引用本文复制引用
张守昊,孙蕾,JAMSHIDI Abdul Hakim,牛勇,刘霞,FAN Zhaofei..蒙东黑土区坡耕地退化现状分析[J].中国水土保持科学,2025,23(1):140-149,10.基金项目
国家重点研发计划子课题"侵蚀退化耕地生产力快速提升技术"(2018YFC0507005) （2018YFC0507005）
国家自然科学基金面上项目"坡式经济林地土壤水分运移动态及内在机理"(32071840) （32071840）
