| 摘要: |
| 目的 温室气体排放是农业绿色发展的重要指标，而氧化亚氮（N2O）是农业温室气体的重要组成部分。为了了解北京市农业N2O的排放情况，并为北京市低碳农业发展提出建议。方法 文章运用文献调研与数据统计方法，收集了2015—2019年北京市各区种植业与畜牧业基础数据，进行全市和各区的农业N2O排放核算工作，并对核算结果及其不确定性进行分析。结果 （1）2015—2019年北京市农业N2O排放呈下降趋势，2019年北京农业N2O排放量为26.1万tCO2e，较2015年减少了46.88万tCO2e，减排率高达64.2%；（2）种植业N2O为北京市农业N2O最大排放源，占2015—2019年北京市农业N2O排放年均贡献率的58.3%；（3）2015—2019年北京市种植业N2O与畜牧业N2O排放均呈下降趋势，它们的最大排放源分别是化肥N2O排放与家禽N2O排放，分别占种植业N2O排放与畜牧业N2O排放年均贡献率的54.1%和42.8%；（4）2019年全市种植业N2O排放量与畜牧业N2O排放量均较2015年有所下降，门头沟区是2019年较2015年全市唯一种植业N2O排放有所增加的地区。结论 2015—2019年北京农业N2O减排显著，可进一步通过改善农田管理和畜禽粪便管理等方式助力农业N2O减排。 |
| 关键词: 温室气体 氧化亚氮 北京市 农业 低碳 |
| DOI：10.7621/cjarrp.1005-9121.20230105 |
| 分类号:F323.22 |
| 基金项目:十三五国家重点研发计划课题“种养殖企业（组织）非二氧化碳温室气体排放量化及核查关键技术研究”（2017 YFF0211703） |
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| CHANGES AND ANALYSIS OF AGRICULTURAL NITROUS OXIDE EMISSION IN BEIJING FROM 2015 TO 2019 |
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Wang Anji1,2, Ma Wenlin1,2, Wu Jianfan3, Jia Xiaohong4
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1.School of Environmental and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;2.Beijing Climate Change Response Research and Education Center, Beijing 100044, China;3.Beijing Low Carbon Agriculture Association, Beijing 100107, China;4.Beijing Cultivated Land Construction and Protection Center, Beijing 100101, China
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| Abstract: |
| Greenhouse gas emissions are an important indicator of green development in agriculture, and nitrous oxide is an important component of agricultural greenhouse gases. This research aims to understand the emissions of nitrous oxide from agriculture in Beijing, and make suggestions for the development of low carbon agriculture in Beijing. Using literature research and data statistics methods, the paper collected basic data on the planting and animal husbandry in each district of Beijing from 2015 to 2019, and carried out accounting work on the agricultural nitrous oxide emissions in Beijing and its municipal districts from 2015 to 2019 based on relevant accounting methods, and analyzed the results of the data and their uncertainties. The findings were revealed as follows. (1) Beijing's agricultural nitrous oxide emissions showed a decreasing trend from 2015 to 2019, and in 2019, Beijing's agricultural nitrous oxide emissions were 261 000 tons of carbon dioxide equivalent, a reduction of 468 800 tons of carbon dioxide equivalent from 2015. Compared with the data of 2015, the agricultural nitrous oxide reduction rate in 2019 was as high as 64.2%. (2) Nitrous oxide from the plantation sector was the largest source of agricultural nitrous oxide emissions in Beijing, accounting for 58.3% of the annual average contribution of agricultural nitrous oxide emissions in Beijing from 2015 to 2019. (3) Nitrous oxide emissions from planting and nitrous oxide emissions from animal husbandry both exhibit a declining trend in Beijing from 2015 to 2019, and their largest sources were nitrous oxide from fertilizer and nitrous oxide from poultry, respectively. Fertilizer nitrous oxide emissions and poultry nitrous oxide emissions contributed 54.1 percent and 42.8 percent, respectively, to planting nitrous oxide emissions and animal husbandry nitrous oxide emissions. (4) In 2019, nitrous oxide emissions from planting and animal husbandry nitrous oxide in Beijing decreased compared to 2015. The one and only district in the city where nitrous oxide emissions from planting rose in 2019 compared to 2015 was Mentougou. Therefore, it can be concluded as follows that the reduction of nitrous oxide emissions from agriculture in Beijing from 2015 to 2019 is significant and can contribute to agricultural N2O emission reduction by improving farmland management and other means. |
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