Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations

Liu, Wenfeng1; Yang, Hong1,2; Liu, Junguo3; Azevedo, Ligia B.4; Wang, Xiuying5; Xu, Zongxue6; Abbaspour, Karim C.1; Schulin, Rainer7

2016-12

10.1016/j.scitotenv.2016.08.093

SCIENCE OF THE TOTAL ENVIRONMENT   影响因子和分区

0048-9697

1879-1026

Agricultural application of reactive nitrogen (N) for fertilization is a cause of massive negative environmental problems on a global scale. However, spatially explicit and crop-specific information on global N losses into the environment and knowledge of trade-offs between N losses and crop yields are largely lacking. We use a crop growth model, Python-based Environmental Policy Integrated Climate (PEPIC), to determine global N losses from three major food crops: maize, rice, and wheat. Simulated total N losses into the environment (including water and atmosphere) are 44 Tg N yr(-1). Two thirds of these, or 29 Tg N yr(-1), are losses to water alone. Rice accounts for the highest N losses, followed by wheat and maize. The N loss intensity (NLI), defined as N losses per unit of yield, is used to address trade-offs between N losses and crop yields. The NLI presents high variation among different countries, indicating diverse N losses to produce the same amount of yields. Simulations of mitigation scenarios indicate that redistributing global N inputs and improving N management could significantly abate N losses and at the same time even increase yields without any additional total N inputs. (C) 2016 Elsevier B.V. All rights reserved.

N losses Global assessment NLI Trade-offs Major crops PEPIC

SCI ; EI

英语

其他

Beijing Natural Science Foundation[8151002]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000387807200053

ELSEVIER SCIENCE BV

20163402731340

Climate models ; Commerce ; Crops ; Cultivation ; Environmental protection ; Nitrogen

Meteorology:443 ; Environmental Impact and Protection:454.2 ; Chemical Products Generally:804 ; Agricultural Methods:821.3 ; Agricultural Products:821.4 ; Mathematics:921 ; Social Sciences:971

ENVIRONMENT/ECOLOGY

Web of Science

1.Eawag Swiss Fed Inst Aquat Sci & Technol, Ueberlandstr 133, CH-8600 Dubendorf, Switzerland
2.Univ Basel, Dept Environm Sci, Peterspl 1, CH-4003 Basel, Switzerland
3.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
4.IIASA, Ecosyst Serv & Management Program, Schlosspl 1, A-2361 Laxenburg, Austria
5.Blackland Res & Extens Ctr, Temple, TX 76502 USA
6.Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China
7.ETH, Inst Terr Ecosyst, Univ Str 16, CH-8092 Zurich, Switzerland

Liu, Wenfeng,Yang, Hong,Liu, Junguo,et al. Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,572:526-537.

Liu, Wenfeng.,Yang, Hong.,Liu, Junguo.,Azevedo, Ligia B..,Wang, Xiuying.,...&Schulin, Rainer.(2016).Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations.SCIENCE OF THE TOTAL ENVIRONMENT,572,526-537.

Liu, Wenfeng,et al."Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations".SCIENCE OF THE TOTAL ENVIRONMENT 572(2016):526-537.