水土保持研究2025，Vol.32Issue(1)：13-20,8.DOI:10.13869/j.cnki.rswc.2025.01.040
内蒙古农牧交错区典型黑土坡耕地土壤侵蚀空间分布特征
Spatial distribution characteristics of soil erosion on typical black soil slopes in Inner Mongolia's agricultural and pastoral intertwined areas
摘要
Abstract
[Objective]To quantify the rate of soil erosion in typical black soil areas of Inner Mongolia,investigate the spatial distribution characteristics of soil erosion in the region,and elucidate the spatial distribution patterns of slopes and regions soil erosion.The aim is to provide references for regional soil erosion management.[Methods]In this study,soil samples were collected from typical black soil sloping cropland in Inner Mongolia's agricultural and pastoral intertwined areas(Hailar District,Erguna City,and Yakeshi City).The 137Cs tracer technology was utilized to calculate the soil erosion rate at each sampling point.Additionally,the method of wavelet analysis was employed to investigate the distribution characteristics of soil erosion on the slopes.[Results](1)All sampling points on all three slopes had 137 Cs levels lower than the background value(1 984.24 Bq/m2),indicating soil erosion on all slopes.(2)The average erosion rate of the slopes in the three areas was in the order that Hailar[6 533.37 t/(km2·a)]＞Erguna[4 174.35 t/(km2·a)]＞Yakeshi[2 765.87 t/(km2·a)].The average erosion rates of the three longitudinal sections of the same slope were similar,but the coefficient of variation of the erosion rates within the same section was high.(3)The soil erosion rate varied periodically of strength and weakness along the slope length,but the cycle length was not constant.The most of longitudinal sections exhibited two cycles of change.The small cycle ranges from 80 to 160 m,while the large cycle ranges from 160 to 200 m.Some longitudinal sections only had one cycle of change,with a length ranging from 100 to 120 m.[Conclusion]Soil erosion in this area exhibits full-slope erosion at the slope scale and displays cyclic characteristics in the longitudinal direction.There is a gradual increase trend from east to west at the regional scale.The findings of this study can offer a scientific basis and data support for soil erosion management in the study area.关键词
土壤侵蚀/典型黑土/农牧交错带/小波分析Key words
soil erosion/typical black soil/farming-pastoral zone/wavelet analysis分类
农业科技引用本文复制引用
邹惠杰,刘刚,舒成博,孙波,刘亚,张琼,郭珍..内蒙古农牧交错区典型黑土坡耕地土壤侵蚀空间分布特征[J].水土保持研究,2025,32(1):13-20,8.基金项目
中国科学院战略性先导科技专项(子课题)"黑土地保护与利用科技创新工程专项"(XDA28010201) （子课题）
