首页|Opportunity and shift of nitrogen use in China

Opportunity and shift of nitrogen use in China

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It is never an easy task for China to feed 1.4 billion people with only 7％of the world's arable land.With nearly 30％of the world's nitrogen(N)fertilizer applied,China achieves high crop yields while facing N pollution result-ing from excessive N input.Here,we calculate the farmland N budget on the national and regional scales.The N use efficiency(NUE)in China increased by 28.0％during 2005-2018.This improvement is due to the reduction in fertilization and the improvement of crop management.The fragmented farmland is changing to large-scale farmland with the increase in cultivated land area per rural population and the development of agricultural mech-anization.This opportunity brings more possibilities for precision farmland management,thus further improving NUE.The goal of an NUE of 0.6 may be achieved in the 2040s based on the current development trend.This striking N use shift in China has important implications for other developing countries.

Environmental Kuznets curveNitrogen surplusGreenhouse gas emissionClimate changeNon-point source pollution

Wangzheng Shen、Jing He、Sisi Li、Yanhua Zhuang、Hongyuan Wang、Hongbin Liu、Liang Zhang、Andreas Kappler

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Hubei Provincial Engineering Research Center of Non-Point Source Pollution Control,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,China

University of Chinese Academy of Sciences,Beijing 100049,China

School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan 430078,China

State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution,Ministry of Ecology and Environment of the People's Republic of China,Wuhan 430078,China

Hubei Key Laboratory of Yangtze River Basin Environmental Aquatic Science,Wuhan 430078,China

Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China

Geomicrobiology Group,Center for Applied Geosciences(ZAG),University of Tuebingen,Tuebingen D-72076,Germany

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国家自然科学基金国家自然科学基金国家重点研发计划

U21A2025419071512022YFD1700700

2024

10.1016/j.geosus.2023.09.003

地理学与可持续性(英文)

地理学与可持续性(英文)

ISSN：
年,卷(期)：2024.5(1)
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