全球智库信息集成服务系统(G2TT): Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1016/j.scitotenv.2016.08.093
	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
发表日期	2016
出处	Science of The Total Environment 572: 526-537
出版年	2016
语种	英语
摘要	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
主题	Ecosystems Services and Management (ESM)
URL	http://pure.iiasa.ac.at/id/eprint/13766/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/130777
推荐引用方式 GB/T 7714	Liu W,Yang H,Liu J,et al. Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations.. 2016.