Research on Precise Management Zoning at Field Scale in Typical Black Soil Water Erosion Areas

MA Yuxin; LI Chenxi; MA Shinai; WANG Yiang; LIU Huanjun; BAO Shuai

doi:10.15933/j.cnki.1004-3268.2025.05.017

Abstract：In order to achieve precise management zoning of black soil water erosion areas,the field blocks of Heshan Farm in Heihe City,Heilongjiang Province(typical black soil water erosion areas)were taken as the research object.Precise management zoning was carried out based on their water erosion degree.Sentinel-2 bare soil images and digital elevation model(DEM)data from different periods were combined,and object-oriented segmentation methods were used to accurately manage the field blocks.Then,normalized vegetation index(NDVI)was extracted from multi-year crop growth period images to evaluate the zoning results under different input quantities.Soil characteristics with different degrees of water erosion were explored based on optimal partitioning results,and the impact of different degrees of water erosion on cultivated land was clarified.The results showed that the more severe the water erosion inside the field,the higher the spectral reflectance,and the spectral reflectance of severe water erosion was significantly higher than that of mild water erosion;The optimal input for precise management zoning of soil water erosion was May remote sensing images and DEM data(with a ratio of interval coefficient of variation to intra area coefficient of variation of 2.11),and the addition of April and October remote sensing images reduced accuracy during zoning;Based on precise management zoning results and soil structure stability index(St),it was found that the higher the degree of water erosion,the lower the content of soil organic matter and available nitrogen.The above shows that choosing the appropriate input volume is the key to improve the accuracy of field-scale precision management zoning of soil water erosion in the black soil area.