农业机械学报2026，Vol.57Issue(20)：31-40,10.DOI:10.6041/j.issn.1000-1298.2026.20.003
2000-2024年黑土区退化耕地识别与时空变化特征
Identification and Spatiotemporal Variation Characteristics of Degraded Cultivated Land in Black Soil Region from 2000 to 2024
摘要
Abstract
As a pillar of national food security,the black soil region faces cultivated land degradation from overuse and mismanagement,yet a consensus on its spatiotemporal dynamics remains elusive due to data and methodological constraints.Based on the SDG15.3.1 framework,the land productivity,land cover,and soil organic carbon were selected as indicators,taking the year of 2000 as the baseline period,and the Trends.Earth tool was used to systematically identify and analyze the spatiotemporal variation characteristics of degraded cultivated land in the black soil region in 2005,2010,2015,2020,and 2024,and comparatively validated the results against relevant studies on degradation assessment in the black soil region.The results showed that:from 2000 to 2024,the proportion of degraded cultivated land declined from 30.76%to 16.96%,representing a decrease of 13.80 percentage points,although marked stage-specific variations were observed.The overall trend of cultivated land degradation in the region was alleviated to some extent,but 16.96%of the cultivated land still had degradation problems,mainly concentrated in the northern and central parts of the Songnen Plain,the northeastern part of the Sanjiang Plain,and the southwestern part of foothills of Greater and Lesser Khingan Mountains.From the perspective of sub-indicators,the proportion of degraded cultivated land in terms of land productivity was decreased from 19.16%to 4.21%,the proportion of degraded cultivated land in terms of land cover was decreased from 14.05%to 10.74%,and the proportion of degraded cultivated land in terms of soil organic carbon was increased from 1.44%to 8.85%.From the perspective of the spatial distribution of degradation trends,cultivated land with stable trends(53.54%)and recovery trends(40.49%)accounted for the majority,while only 5.97%of the cultivated land showed an aggravated degradation trend.The spatial distribution range of degraded cultivated land tended to converge,and the center of gravity shifted southwestward overall.Comparative validation showed that the identification results were generally consistent with previous findings on cultivated land degradation,soil erosion,black soil layer thinning,and cultivated land quality degradation,indicating good reliability.Overall,black soil degradation eased between 2000 and 2024,yet nearly one-fifth of cultivated land remained degraded with localized risks.Differentiated governance was thus required to safeguard black soil sustainability and food security.关键词
退化耕地/黑土区/可持续发展目标/时空变化Key words
degraded cultivated land/black soil region/sustainable development goal/spatiotemporal change分类
管理科学引用本文复制引用
牛佳程,汤怀志,樊德昊,许洪滔,武珺,何遇山,王志鹏,梁梦茵..2000-2024年黑土区退化耕地识别与时空变化特征[J].农业机械学报,2026,57(20):31-40,10.基金项目
国家重点研发计划项目(2021YFD1500201) （2021YFD1500201）
