花生季减氮对花生-小麦两熟制农田碳足迹和碳汇生态服务价值的影响  

Effects of nitrogen reduction in peanut field on carbon footprint and ecosystem service of carbon sequestration of peanut-wheat double cropping farmland

作　　者：耿润莲 张志勇[2] 晁晓燕 郝永会 贺云霞 李春喜[1] Geng Runlian;Zhang Zhiyong;Chao Xiaoyan;Hao Yonghui;He Yunxia;Li Chunxi(School of Life Sciences,Henan Normal University,Xinxiang 453007,China;School of Life Sciences,Henan Institue of Science and Technology,Xinxiang 453003,China)

机构地区：[1]河南师范大学生命科学学院,河南新乡453007 [2]河南科技学院生命科学学院,河南新乡453003

出　　处：《河南师范大学学报（自然科学版）》2024年第6期10-19,F0002,共11页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家重点研发计划(2022YFD2300802);中原科技创新领军人才项目(214200510021)。

摘　　要：华北平原作为我国的粮食主产地,最小化碳足迹、最大化碳固存和生态系统服务价值是该区农业发展的重要方向.研究于2021-2022年探究了花生季的3个氮肥水平(90 kg·hm^(-2)、126 kg·hm^(-2)和180 kg·hm^(-2))对花生-小麦两熟制农田碳足迹和碳汇服务价值的影响,旨在确定低碳足迹、高碳汇服务价值、高产量和经济价值的最佳花生季氮肥投入量.结果表明:农田土壤温室气体排放量、有机碳储量和农资温室气体排放量随施氮量的增加而升高,化肥是引起花生-小麦两熟制模式碳排放的主要因素.90 kg·hm^(-2)和126 kg·hm^(-2)施氮量处理下花生的产量显著高于180 kg·hm^(-2)处理25.17%和18.35%.花生农田碳足迹范围为-0.22~0.13 kg·kg^(-1),小麦农田碳足迹范围为0.20~0.49 kg·kg^(-1).由于有机碳储量和作物产量的影响,两熟制农田碳足迹在处理间差异不显著.花生季施氮量对花生-小麦两熟制农田的碳汇服务价值无显著影响.因此,在本系统边界内,90 kg·hm^(-2)的花生季施氮量为实现花生-小麦两熟制高产、减少碳排放、提高经济效益和碳汇价值的最佳氮肥施用量.As the main grain producing area in China,minimizing carbon footprint and maximizing carbon sequestration and ecosystem service value are important directions for agricultural development in the North China Plain.In this study,the effects of three nitrogen fertilizer levels(90 kg·hm^(-2),126 kg·hm^(-2)and 180 kg·hm^(-2))in the peanut season on the carbon footprint and carbon sink service value of peanut-wheat double cropland were investigated from 2021 to 2022,with the aim of determining the optimal peanut season nitrogen fertilizer input for low carbon footprint,high carbon sink service value,high yield and economic value.The results showed that greenhouse gas emission from farm soil,organic carbon sequestration and greenhouse gas emission from agricultural sources increased with increasing nitrogen application,and that chemical fertilizer was the main factor causing carbon emission from peanut-wheat double system.The yield of peanut under 90 kg·hm^(-2)and 126 kg·hm^(-2)nitrogen application treatments was significantly higher than the 180 kg·hm^(-2)treatment by 25.17%and 18.35%.The carbon footprint of peanut farmland ranged from-0.22 to 0.13 kg·kg^(-1)and that of wheat farmland ranged from 0.20 to 0.49 kg·kg^(-1).There was no significant difference between treatments in the carbon footprint of the double cropland due to the organic carbon sequestration and crop yield.There was no significant effect of peanut season nitrogen application on the carbon sink service value of peanut-wheat double cropping farmland.Therefore,within the boundary of this system,the peanut season nitrogen application rate of 90 kg·hm^(-2)is the optimal one for achieving high yield,reducing carbon emission,and increasing economic efficiency and carbon sink value in the peanut-wheat double system.

关 键 词：花生-小麦两熟制 减施氮肥 温室气体 碳足迹 碳汇服务价值 

分 类 号：Q948.112[生物学—植物学]