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| Spatiotemporal pattern and potential to mitigate ammonia emissions from agriculture in Beijing-Tianjin-Hebei region, China |
| Received:January 30, 2021 |
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| KeyWord:Beijing-Tianjin-Hebei;ammonia emission;emission inventory;spatial-temporal pattern;ammonia emission reduction |
| Author Name | Affiliation | E-mail | | ADALIBIEKE Wulahati | College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
Laboratory for Earth Surface Processes, Ministry of Education Peking University, Beijing 100871, China | | | ZHAN Xiaoying | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Key Laboratory of Agricultural Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | ZHOU Feng | College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
Laboratory for Earth Surface Processes, Ministry of Education Peking University, Beijing 100871, China | zhouf@pku.edu.cn | | JU Xuehai | Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | juxuehai@163.com | | XI Bin | Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | HUANG Hongkun | Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | JIN Tuo | Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | XU Dandan | Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | |
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| Abstract: |
| Improper management of fertilizer and manure in the Beijing-Tianjin-Hebei(BTH) region has produced high level of ammonia (NH3) emissions, which is an important cause of haze in the BTH region. This study inventoried the agricultural NH3 emissions from the BTH region using the emissions factor method and a high-resolution NH3 activity dataset. The total amount, sources and spatiotemporal patterns of NH3 emissions, as well as mitigation potentials for the same, were evaluated. It was concluded that NH3 emissions from agricultural sources in the BTH region were 429.1 Gg·a-1 for the period of 2015-2019, during which maize cultivation, the application of urea, and indoor housing were the main sources of NH3 emissions. However, NH3 emissions from agriculture also decreased year by year during from 2015-2019, and the reduction from cropland emissions accounted for 75% of the total decrease. NH3 emissions from the southern part of the BTH region were higher than those from the northern part, and half of the counties in the region contributed more than 80% of its emissions. Enhancing the efficiency of nitrogen use could greatly reduce NH3 emissions from cropland(by 57.5%), while replacing calcium carbonate in fodder with acidic calcium carbonate could also effectively reduce emissions from livestock(by 26%~53%). |
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