数字农科院2.0

Spatiotemporal dynamics of crop residue utilization drive regional carbon mitigation in China

文献类型： 外文期刊

作者： Zhijuan Yang;Min Shang;Jiang Sun;Chenghan Chen;Yanwei Wang;Guoquan Hu;Qili Zhu

作者机构：

关键词： CO2 mitigation;CR comprehensive utilization;CR yields;Sichuan province;Spatiotemporal variations

期刊名称： Scientific Reports

ISSN： 2045-2322

年卷期： 2025 年 15 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： To achieve China’s goals of peaking carbon emissions and achieving carbon neutrality, carbon sequestration and mitigation in agriculture and rural areas are crucial measures with significant potential. The comprehensive use of crop residue (CR) is vital in carbon sequestration and mitigation in agriculture and rural areas. This study analyzed the spatiotemporal variations in CR yields and carbon dioxide (CO2) mitigation from the comprehensive utilization of CR in Sichuan Province, a central agricultural province in southwest China. The results are as follows: 1. Over the past 30 years, CR yields have shown a slight growth, with rapid increases in maize and rapeseed sown areas being the main driving factors. 2. From 2015 to 2022, the average utilization capacities of CR as fertilizer, feed, and energy can be described by replacing all K2O, 58.29% of P2O5, and 31.85% of N in fertilizers, feeding 15.76 million sheep units (SU), and replacing 2.33 Mt of standard coal per year, respectively. Importantly, CO2 mitigation from CR comprehensive utilization was up to 8.40 Mt per year, of which energy utilization contributed the most. 3. Combined with CR yields and comprehensive utilization status, CO2 mitigation areas are mainly distributed in the Chengdu Plain, northeast and southern Sichuan.

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