Food-driven transformation of nitrogen fluxes with urbanization in China

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2024-11-29 DOI:10.1016/j.resconrec.2024.108034

Ouping Deng , Jiale Wei , Jinglan Cui , Shuai Huang , Luxi Cheng , Rong Huang , Baojing Gu

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Abstract

Urbanization shifts populations from rural to urban areas, altering food consumption and production patterns, which impacts nitrogen cycles. However, the contributions of urbanization to nitrogen flux dynamics remain insufficiently understood. This study analyzes nitrogen flux changes in China from 1990 to 2020 using data from the National Bureau of Statistics and Agricultural Pollution Censuses, alongside CHANS models. Results show that rising food demand has driven a 75 % increase in fertilizer use and a 132 % rise in nitrogen pollution, with urbanization adding 1.4 million tonnes of nitrogen emissions. By 2050, urban food consumption is projected to rise by 48 %, driving a 45 % increase in nitrogen pollution. Applying multiple measures can reduce nitrogen consumption and losses, with rural areas offering greater reduction potential than urban areas, highlighting the need for targeted nitrogen management to address urbanization's environmental impacts effectively.

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中国城市化进程中食物驱动的氮通量转换

城市化将人口从农村转移到城市地区，改变了粮食消费和生产模式，从而影响了氮循环。然而，城市化对氮通量动力学的贡献仍未得到充分认识。本研究利用国家统计局和农业污染普查的数据，结合CHANS模型，分析了1990 - 2020年中国氮通量的变化。结果表明，不断增长的粮食需求导致化肥使用量增加了75%，氮污染增加了132%，城市化增加了140万吨氮排放。到2050年，城市食品消费预计将增长48%，导致氮污染增加45%。采取多种措施可以减少氮的消耗和损失，农村地区比城市地区具有更大的减排潜力，因此需要有针对性的氮管理，以有效解决城市化对环境的影响。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.