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

Liu W, Yang H, Liu J, Azevedo LB, Wang X, Xu Z, Abbaspour KC, & Schulin R (2016). Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations. Science of The Total Environment 572: 526-537. DOI:10.1016/j.scitotenv.2016.08.093.

Full text not available from this repository.

Abstract

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

Item Type: Article
Research Programs: Ecosystems Services and Management (ESM)
Depositing User: Luke Kirwan
Date Deposited: 25 Aug 2016 06:47
Last Modified: 25 Jan 2017 15:57
URI: http://pure.iiasa.ac.at/13766

Actions (login required)

View Item View Item

International Institute for Applied Systems Analysis (IIASA)
Schlossplatz 1, A-2361 Laxenburg, Austria
Phone: (+43 2236) 807 0 Fax:(+43 2236) 71 313