生态科学2026，Vol.45Issue(1)：66-77,12.DOI:10.14108/j.cnki.1008-8873.2026.01.008
内蒙古半干旱区土壤养分空间分异特征及影响因素分析
Spatial differentiation characteristics and environmental factors of soil nutrients in semi-arid area of Inner Mongolia
摘要
Abstract
The semi-arid Loess Plateau in Inner Mongolia is a typical fragile area of ecological environment in China,and it is also one of the important areas for vegetation restoration and ecological construction.Taking the tributary basin of the Red River in Inner Mongolia as the research area,30 sampling points were evenly distributed by grid method for field monitoring and indoor analysis.The spatial distribution characteristics and influencing factors of surface soil nutrient content were analyzed by means of geostatistics,spatial autocorrelation Moran's I index,Kriging interpolation and redundancy analysis.It had important guiding significance for vegetation restoration and land use optimization in arid areas.The results showed that:(1)The soil in the Red River Basin was alkaline,the total potassium content was higher than the national average,and the other nutrient contents were relatively poor.(2)The spatial fitting of total potassium was a linear model,pH was a spherical model,total phosphorus was a Gaussian model,and total nitrogen and organic matter were exponential models.The total phosphorus content and pH value were circularly distributed.The total potassium content increased from southwest to northeast,and the total nitrogen and organic matter content increased from west to east.The four nutrients were high-high aggregation type in the eastern region and low-low aggregation type in the western region.High-high pH gathered in the middle of the study area,low-low gathered in the south of the study area.(3)Nutrients in the study area were mainly affected by silt content,elevation,slope,aspect and vegetation type.Except for the irregular change of total potassium content,the other three nutrient contents increased with the increase of elevation,and the content was the lowest in the middle and high slope,and the nutrient content in the sunny slope was higher than that in the shady slope.The nutrient content increased with the increase of silt content.The total potassium content in poplar-caragana mixed forest was the highest,and the total nitrogen,total phosphorus and organic matter contents were the highest in grassland,while the total nitrogen and organic matter contents in degraded farmland were the lowest.In the ecological restoration of semi-arid areas,measures such as the addition of nitrogen and phosphorus fertilizers and the return of crop residues can be taken to improve the nutrient deficiency.It is suggested that vegetation restoration should be based on the construction of mixed forests and natural restoration grasslands.关键词
土壤养分含量/红河流域/空间自相关/空间分布特征/影响因素Key words
soil nutrient content/Red River basin/spatial autocorrelation/spatial distribution characteristics/influencing factors分类
资源环境引用本文复制引用
胡亚馨,田雅楠,卢俊平,刘晓民,刘廷玺,杨耀天,冯琛..内蒙古半干旱区土壤养分空间分异特征及影响因素分析[J].生态科学,2026,45(1):66-77,12.基金项目
内蒙古自治区科技计划项目(2022YFHH0069) （2022YFHH0069）
内蒙古自治区科技重大专项(2021ZD0008) （2021ZD0008）
国家自然科学基金(U2243234) （U2243234）
国家重点研发计划(2022YFC3204400,2022YFC3204405) （2022YFC3204400,2022YFC3204405）
内蒙古自治区教育厅科技英才项目(NJYT22040) （NJYT22040）
鄂尔多斯市国家可持续发展议程创新示范区建设科技支撑项目(KCX2024013)内蒙古自治区科技领军人才团队(2022LJRC0007) （KCX2024013）
