麦类作物学报2026，Vol.46Issue(6)：828-837,10.DOI:10.7606/j.issn.1009-1041.2026.06.13
2014-2023年江苏省小麦生产体系碳氮足迹年际变化特征及构成分析
Analysis of the Interannual Variation Characteristics and Composition of Carbon and Nitrogen Footprints of Wheat Production System in Jiangsu Province from 2014 to 2023
摘要
Abstract
To provide a basis for formulating carbon and nitrogen reduction measures for wheat produc-tion in Jiangsu Province,a carbon and nitrogen accounting boundary for Jiangsu's wheat production system was constructed,analyzing the resource input characteristics and carbon and nitrogen footprint trends from 2014 to 2023,based on the life cycle assessment method.The results indicate that over the decade,the cost per unit area and per unit yield in Jiangsu's wheat production system showed an upward trend.Agricultural input costs were primarily attributed to fertilizers(33.38％-40.06％)and machinery(30.21％-35.72％).The per unit area carbon footprint and per unit yield carbon foot-print of wheat were 2.52 t·hm-2 and 0.46 t·t-1,respectively,while the per unit area nitrogen footprint and per unit yield nitrogen footprint were 103.96 kg·hm-2 and 18.89 g·kg-1.The carbon footprint generally exhibited an increasing trend over time,with an annual growth rate of 2.23％,while active nitrogen emissions showed little variation.In the carbon footprint composition,fertiliza-tion and machinery(irrigation and diesel)were the primary sources of wheat carbon emissions,con-tributing 63.70％and 22.38％to total emissions,respectively.Ammonia(NH3)volatilization was the main pathway for active nitrogen emissions in wheat production.The per unit yield carbon and ni-trogen footprints were significantly negatively correlated with wheat yield.Overall,reducing carbon emissions in wheat fertilization and mechanical operations,along with increasing straw carbon seques-tration,are key strategies for lowering wheat production carbon and nitrogen footprints.Measures such as promoting organic fertilizer substitution for chemical fertilizers,integrated water and fertilizer management,straw return,and the use of lightweight agricultural machinery can enhance fertilizer efficiency and mechanical productivity,thereby reducing carbon and nitrogen emissions in wheat pro-duction and achieving green,low-carbon,and sustainable development.关键词
小麦生产体系/生命周期评价法/碳氮足迹/年际演变特征/秸秆还田Key words
Wheat production system/Life cycle assessement/Carbon and nitrogen footprint/Interan-nual evolution characteristics/Straw incorporation分类
农业科技引用本文复制引用
李慧,杜文婧,芦迈,杨清清,张凌俣,赵文娜,代新俊..2014-2023年江苏省小麦生产体系碳氮足迹年际变化特征及构成分析[J].麦类作物学报,2026,46(6):828-837,10.基金项目
山西省基础研究计划项目(202103021223370、202403021222331) （202103021223370、202403021222331）
山西省高等学校科技创新项目(2024L328) （2024L328）
忻州师范学院1331工程院级研究项目(2021KY13) （2021KY13）
