Localized nitrogen management strategies can halve fertilizer use in Chinese staple crop production

被引：9

作者：

Liu, Yize ^{[1
]}

Zhuang, Minghao ^{[2
,3
]}

Liang, Xia ^{[4
,5
]}

Lam, Shu Kee ^{[4
]}

Chen, Deli ^{[4
]}

Malik, Arunima ^{[6
,7
]}

Li, Mengyu ^{[6
]}

Lenzen, Manfred ^{[6
]}

Zhang, Liying ^{[1
]}

Zhang, Rui ^{[2
,3
]}

Zhang, Lixiao ^{[1
]}

Hao, Yan ^{[1
]}

机构：

[1] Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing, Peoples R China

[2] China Agr Univ, Coll Resources & Environm Sci, State Key Lab Nutrient Use & Management, Key Lab Plant Soil Interact,Minist Educ, Beijing, Peoples R China

[3] China Agr Univ, Natl Acad Agr Green Dev, Beijing, Peoples R China

[4] Univ Melbourne, Sch Agr & Food, Melbourne, Vic, Australia

[5] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Field Sci Observat & Expt Stn Ecol Agr Miyun, Beijing, Peoples R China

[6] Univ Sydney, Sch Phys, ISA, Sydney, NSW, Australia

[7] Univ Sydney, Sydney Business Sch, Discipline Accounting, Sydney, NSW, Australia

来源：

NATURE FOOD | 2024年 / 5卷 / 10期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

NUTRIENT-UPTAKE REQUIREMENTS; PRICE VOLATILITY; N MANAGEMENT; EMISSIONS; CARBON; INPUTS; RICE;

D O I：

10.1038/s43016-024-01057-z

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

Nitrogen (N) management is the key to achieving food security and environmental sustainability. Here we analyse N flows using a localized N management model for wheat, maize and rice in 1,690 Chinese counties, with a breakdown of multiple reactive N (Nr) loss pathways. Results show that the total N input for producing these three staple crops in China was 22.2 Tg N in 2015, of which 7.4 Tg N was harvested as grain N and 4.0 Tg N was Nr losses in the forms of NH3 (47%), NOx (10%), N2O (3%), and leaching and runoff (40%). By assuming a production level equivalent to that of the top 10% of counties with the highest N use efficiency and yields surpassing the regional average, we reveal the possibility of achieving national staple crop production targets while improving net ecosystem economic benefit in 2050 through a 49% reduction (10.4 Tg N) in synthetic N fertilizer inputs and a 52% decrease (2.9 Tg N) in Nr losses. Staple crop production in China involves high levels of synthetic fertilizer use and losses to the environment. Using a localized nitrogen management model for wheat, maize and rice, this study estimates the environmental and economic benefits of improving nitrogen use efficiency at the county level.

引用

页码：825 / 835

页数：14

共 104 条

[1] Decoupling between ammonia emission and crop production in China due to policy interventions [J].