数字农科院2.0

Recultivating abandoned cropland intensifies the trade-off between climate change mitigation and food security within the Yangtze River Basin, China

文献类型： 外文期刊

作者： Yuqiao Long;Jing Sun;Gilles Colinet;Jian Peng;Joost Wellens;Xiuchun Dong;Chuya Wang;Ping Huang;Wenbin Wu;Jeroen Meersmans

关键词： Cropland abandonment; Climate change mitigation Food security Carbon–food trade-off Yangtze River Basin

期刊名称： LAND USE POLICY

ISSN： 0264-8377

年卷期： 2025 年

页码：

收录情况： SSCI（2025版）

摘要： Cropland abandonment and subsequent recultivation create a pressing trade-off between carbon sequestration and food production. In the fragile, mountainous landscapes of the Yangtze River Basin, how recultivation mediates this trade-off remains poorly understood. This study quantified annual carbon stock and grain yield changes from 2002 to 2020 at both provincial and 10 × 10 km grid scales, using Spearman’s correlation coefficient to assess the trade-off. Our analysis revealed that abandoned cropland accrued 182.3 Mt C, only 48.1 % of the potential sequestration under continuous abandonment. Although recultivation curtailed potential carbon gains by 51.9 %, it limited grain production losses to 13.5 Mt. Without recultivation, this deficit would have reached 65.6 Mt. The net effect of recultivation thus improved food security—offsetting a grain deficit sufficient to feed 37.2 million people—yet intensified the trade-off between carbon storage and food production. This trade-off was pervasive across scales, observed in all provinces and in 99 % of grid cells. However, isolated synergies (1 %) emerged in areas with specific terrain features or targeted interventions, such as agroforestry and High-Standard Cropland policies. Our findings demonstrate that while recultivation is critical for mitigating food security risks, it intensifies the trade-off between climate change mitigation and food security. These observations highlight the imperative for developing terrain-specific, site-appropriate strategies to co-optimize climate and food objectives.

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