Crop redistribution is widely recognized as an effective means of reducing the environmental costs of agricultural production without technological improvements. However, changes in food supply driven by dietary shift are rarely taken into account in crop redistribution. Based on inventory analysis of water consumption, land demand and carbon emission in crops production, this study constructed a linear optimization model to explore crop redistribution strategy and the saving potential of environmental costs in context of dietary shift. The results showed that crops production in 2030 would increase water consumption by 2.84%, land demand by 1.19%, and carbon emission by 1.31% compared with 2020 if the diet remained unchanged. Crop redistribution considering dietary shift provided an effective approach to achieve significant environmental benefits, including reductions in water consumption of 3.33%–14.91%, arable land use of 1.13%–13.90%, and carbon emission of 6.17%–20.26% compared to the baseline scenario, among which, dietary shift contributed 2.64 ± 6.12%, 0.75 ± 7.06%, and 1.32 ± 7.19%, respectively. The findings highlighted that appropriate dietary shift could enhance the environmental benefits of crop redistribution. Insights into the dietary shift and concomitant environmental benefits debate on crop redistribution have important policy implications for improving the sustainability of agricultural production.

中文翻译：

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饮食转变可以增强作物重新分配的环境效益


作物重新分配被广泛认为是在不改进技术的情况下降低农业生产环境成本的有效手段。然而，在作物重新分配中很少考虑饮食转变引起的食物供应变化。本研究基于作物生产中的水消耗、土地需求和碳排放的存量分析，构建了线性优化模型，以探索膳食转变背景下的作物再分配策略和环境成本的节省潜力。结果表明，在饮食结构不变的情况下，2030年农作物生产将比2020年增加2.84%的用水量、1.19%的土地需求、1.31%的碳排放。考虑饮食转变的作物重新分配为实现显着环境效益提供了有效方法，与基线相比，水消耗量减少了3.33%–14.91%，耕地使用量减少了1.13%–13.90%，碳排放量减少了6.17%–20.26%其中，饮食转变分别贡献了2.64±6.12%、0.75±7.06%和1.32±7.19%。研究结果强调，适当的饮食转变可以增强作物重新分配的环境效益。对饮食转变以及随之而来的关于作物重新分配的环境效益辩论的见解对于提高农业生产的可持续性具有重要的政策意义。