Ai Hong-Shan, Fan Bo, Zhou Zheng-Qing, Liu Jianhui
School of Economics and Trade, Hunan University, Changsha, 410081, Hunan, China.
School of Economics and Trade, Hunan University, Changsha, 410081, Hunan, China.
J Environ Manage. 2024 Nov;370:122880. doi: 10.1016/j.jenvman.2024.122880. Epub 2024 Oct 15.
We examine the effects of nitrogen fertilizer application on air pollution in China. Distinct from the existing literature that tends to utilize field sampling method, we construct a comprehensive panel dataset and discover that 1 g nitrogen increase in fertilizer correlates with a rise of 0.55 μg/m³ in PM concentrations. Additionally, heterogenous results across the crops indicate that rice and corn crops exacerbate air pollution, whereas the impact of nitrogen fertilizer on wheat remains ambiguous, and these effects predominantly emerge during the initial growth stages. Our findings also suggest that while the nitrogen fertilizer contributes to heightened levels of PM and SO, it conversely leads to a reduction in ozone concentrations, which is not provided by existing studies.
我们研究了氮肥施用对中国空气污染的影响。与现有文献倾向于采用实地采样方法不同，我们构建了一个综合面板数据集，并发现肥料中每增加1克氮，与颗粒物浓度每立方米增加0.55微克相关。此外，不同作物的异质性结果表明，水稻和玉米作物会加剧空气污染，而氮肥对小麦的影响仍不明确，且这些影响主要出现在作物生长初期。我们的研究结果还表明，虽然氮肥会导致颗粒物和二氧化硫水平升高，但相反会导致臭氧浓度降低，这是现有研究未提及的。
