耕地“非粮化”对农田生态系统碳足迹影响研究

Study on the Impact of Farmland"Non grain"on the Carbon Footprint of Farmland Ecosystem

基于双碳发展背景研究耕地“非粮化”驱使下的农田生态碳足迹变化,可为建设低碳农业提供参考依据。利用福建省2000-2020年农业相关统计数据,基于生命周期评价法估算碳源、利用作物产量估算碳汇,计算各年份农田生态系统碳足迹,结合耕地“非粮化”趋势分析两者的相关性,并提出建设低碳农田生态系统的优化策略。结果表明,碳足迹提高与粮作比例降低高度吻合,VAR结果表明粮作比例和农田生态系统碳足迹存在统计学上显著的因果关系,且粮作比例的提升会减少农田生态系统碳足迹。政府部门应设立精准补贴政策,完善落实自身耕保责任制,制度与低碳技术融合,推动农田生态系统的低碳发展。

Based on the background of double carbon development,the study on the ecological carbon footprint change of farmland driven by“non-food”can provide a reference for the construction of low-carbon agriculture.Based on the agricultural statistics of Fujian Province from 2000 to 2020,carbon sources were estimated based on life cycle assessment method,and carbon sinks were estimated using crop yield.The carbon footprint of farmland ecosystem in each year was calculated.The corelation between the two was analyzed combined with the trend of“non-food”of cultivated land,and the optimization strategy of constructing lowcarbon farmland ecosystem was proposed.The results showed that the increase of carbon footprint was highly consistent with the decrease of grain ratio.VAR results showed that there was a statistically significant causal relationship between the proportion of grain used and the carbon footprint of farmland ecosystem,and the increase of the proportion of grain used would reduce the carbon footprint of farmland ecosystem.Government departments should perfect and implement their own farming and protection responsibility system by establishing precise subsidy policies,and integrate the system with low-carbon technology to realize the green development of farmland ecosystem.