Department of Land Management, Zhejiang University, Hangzhou, 310058, People's Republic of China.
College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Environ Sci Pollut Res Int. 2020 Jul;27(20):25813-25817. doi: 10.1007/s11356-020-09154-9. Epub 2020 May 12.
China is the world's largest country on ammonia (NH) emission, which results in sever air pollution there. China's updated Clean Air Act has started to pay attention to NH reduction, but it is believed that solutions are mainly constrained by implementation of suitable technologies. Here we argued that socioeconomic barriers are the key to hinder the reduction of agricultural NH emission for better air quality in China. We found that small farm size is the key driving force for high NH emission from croplands, while little manure storage and recycle facilities and the mismatch of livestock and cropland on spatial distribution are the reasons for high NH emission from livestock. Overcoming these socioeconomic barriers could at least reduce half of the agricultural NH emission while maintaining food production in China. It not only can benefit air quality but also reduce potentials of eutrophication, groundwater contamination, soil acidification, biodiversity loss, and greenhouse gas emission.
中国是世界上氨（NH）排放最大的国家，这导致了那里的严重空气污染。中国最新的《清洁空气法》已经开始关注 NH 的减排，但人们认为解决方案主要受到合适技术实施的限制。在这里，我们认为社会经济障碍是阻碍中国农业 NH 排放减少以改善空气质量的关键。我们发现，小农户规模是农田 NH 排放高的关键驱动因素，而粪便储存和回收设施不足以及牲畜和农田在空间分布上不匹配是畜牧业 NH 排放高的原因。克服这些社会经济障碍至少可以减少中国农业 NH 排放的一半，同时保持中国的粮食生产。这不仅有利于空气质量，还有助于减少富营养化、地下水污染、土壤酸化、生物多样性丧失和温室气体排放的潜力。
