划定黑土地“可量化边界”

Core Insights - The China Geological Survey has developed a comprehensive evaluation model for land resource suitability in Northeast China's black soil region, marking a significant transition from resource assessment to active resource utilization [1][2][3] Group 1: Evaluation Model and Findings - A new evaluation model covering "baseline identification - functional analysis - potential grading" has been established, providing precise technological support for land spatial planning and ecological protection [1] - The survey has delineated the quantifiable boundaries of black soil, identifying an area of 387,500 square kilometers, which constitutes approximately 94% of the surveyed area [2] - The project has revealed that 86.34% of the black soil area is classified as stable or relatively stable, while 88.66% of the area has medium or higher soil quality [2] Group 2: Carbon Storage and Environmental Impact - The project calculated a total carbon storage of 3.401 billion tons in the top 2 meters of the soil layer, with organic carbon storage reaching 2.117 billion tons, supporting carbon neutrality goals [3] - The findings indicate a strong correlation between different types of degradation and the structure of the surface matrix layer, suggesting a need for targeted remediation strategies [3] Group 3: Future Directions and Applications - Future investigations will expand coverage to enhance understanding of black soil resources and establish a normalized monitoring network, integrating with land planning and ecological restoration efforts [3] - The results have been applied in various scenarios, including black soil stripping projects and farmland quality management, providing robust technical support for national agricultural initiatives [3]