摘要
农田生态系统既是碳源,又是碳汇,具备很强的减排固碳潜力,对全球碳循环贡献巨大。西南地区旱坡地长期小规模、碎片化的农业生产方式给区域碳排放带来极大的不确定性。探索西南旱坡地的碳排放特征和减排途径对于改善环境、提升区域农业生产潜力具有重要意义。本研究系统总结了我国西南地区旱坡地农田生态系统主要温室气体(CO_(2)、N_(2)O)的产生环节,探讨了旱坡地固碳减排新材料与新技术的应用效果,提出了未来西南地区旱坡地的固碳减排策略。(1)鉴于西南地区旱坡地的区域资源禀赋、产业基础、生产规模、经营方式、生态功能等差异巨大,应结合地区特殊的农业生产条件,集成研发适宜的固碳减排措施和监测体系,探索全球变暖背景下西南旱坡地碳排放过程及其内在机制,以全面提升地区农业生产应对气候变化的韧性。(2)鉴于西南地区农作物复种指数较高且作物空间分布斑块化,应依据国家战略和地方规划,以绿色高产优质为目标导向,改进农业生产方式,优化产业空间布局。(3)由于西南地区旱坡地碳减排是一个复合过程,亟需根据今后较长一段时间内区域农业生产的实际结构和功能需求,有针对性地对各项成熟的减排技术、固碳产品和固碳模式进行优化组合,形成综合性的固碳减排方案。综上,本综述期望为进一步研究西南地区旱坡地农田生态系统的碳源和碳汇特征,以及合理调整农田管理措施提供全面的有效参考。
The agricultural ecosystem is both a carbon source and a carbon sink,with strong potential for carbon sequestration and thus makes significant contributions to the global carbon cycle.The traditional small-scale and fragmented agricultural production pattern on dry slopes in the southwestern region have brought great uncertainty to regional carbon emissions.Exploring the characteristics of carbon emissions and reduction pathways on dry slopes in the southwest is of great significance for improving the environment and enhancing the potential of regional agricultural production.This study systematically summarized the production processes of major greenhouse gases(CO_(2),N_(2)O,CH4)in the agricultural ecosystem of dry slopes in the southwestern region of China.We discussed the effects of new materials and technologies application for carbon sequestration and emission reduction on dry slopes,and proposed carbon sequestration and emission reduction strategies for dry slopes in the future.(1)Given the significant differences in regional resources,industrial foundation,production scale,management methods,and ecological functions in dry slopes in the southwestern mountainous areas,suitable carbon sequestration and emission reduction measures and monitoring systems should be developed based on the specific agricultural production conditions of the region.The aim was to explore the carbon emission process and its underlying mechanisms in the context of global warming,and comprehensively enhanced the resilience of regional agricultural production to climate change.(2)Considering the high crop replanting index and fragmented spatial distribution of crops in the southwestern mountainous areas,agricultural production methods should be improved and industrial spatial layout should be optimized based on national strategies and local plans,aiming for an agricultural ecosystem with low carbon emission and high productivity.(3)As carbon emission reduction on dry slopes in the southwestern mountainous areas was a complex process,it
作者
王谢
杨琴
刘禹池
李芹
杨勤
陈冠陶
岳丽杰
张建华
陈新平
刘永红
WANG Xie;YANG Qin;LIU Yu-Chi;LI Qin;YANG Qin;CHEN Guan-Tao;YUE Li-Jie;ZHANG Jian-Hua;CHEN Xin-Ping;LIU Yong-Hong(Institute of Agricultural Resources and Environment,Sichuan Academy of Agricultural Sciences,Chengdu 610066,Sichuan,China;School of Resources and Environment,Southwest University,Chongqing 400715,China;Crop Research Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610066,Sichuan,China)
出处
《作物学报》
CAS
CSCD
北大核心
2024年第7期1635-1646,共12页
Acta Agronomica Sinica
基金
四川省自然科学基金青年科学基金项目(2023NSFSCO761)
财政部和农业农村部国家现代农业产业技术体系建设专项(CARS-02,CARS-18)
国家重点研发计划项目(2022YFD1901405)
四川省财政自主创新专项(2022ZZCX014)资助。
关键词
温室气体
旱坡地
固碳减排
中国西南地区
GHG
dry sloping land
carbon sequestration and emission reduction
Southwest China
