Cultivated Land Use Zoning Based on Soil Function Evaluation from the Perspective of Black Soil Protection

Given that cultivated land serves as a strategic resource to ensure national food security, blind emphasis on improvement of production capacity can lead soil overutilization and impair other functions. Therefore, we took Heilongjiang province an example conduct multi-functional evaluation at the provincial scale. A combination soil, climate, topography, use, remote sensing data were used evaluate functions primary productivity, provision cycling nutrients, functional intrinsic biodiversity, water purification regulation, carbon sequestration regulation in 2018. We designed function discriminant matrix, constructed supply-demand ratio, evaluated current status supply demand Soil demonstrated distribution pattern high grade northeast low southwest, mostly second-level areas. The actual productivity 71.32% region cannot meet needs population. dominant 34.89% area is most belongs balance region. results presented herein provide theoretical basis for optimization patterns use management large scale, great significance sustainable black resources comprehensive benefits.