DOI: 10.1002/gbc.20053
Scopus记录号: 2-s2.0-84879200172
论文题名: Patterns and trends in nitrogen use and nitrogen recovery efficiency in world agriculture
作者: Conant R ; T ; , Berdanier A ; B ; , Grace P ; R
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 2 起始页码: 558
结束页码: 566
语种: 英语
英文关键词: cropland
; efficiency
; fertilizer
; manure
; nitrogen
Scopus关键词: cropland
; Developing efficiency
; N fertilization
; Nitrogen recovery
; Non-OECD countries
; Organisation for economic co-operation and development
; Recovery efficiency
; Sustainable growth
; Crops
; Efficiency
; Fertilizers
; Manures
; Nitrogen
; Nitrogen fertilizers
; Recovery
; Societies and institutions
; Water pollution
; Nitrogen fixation
; agricultural land
; agriculture
; alternative agriculture
; atmospheric pollution
; convergence
; crop yield
; data acquisition
; database
; fertilizer application
; food
; manure
; nitrogen
; nitrogen fixation
; nutrient use efficiency
; OECD
; water pollution
英文摘要: Worldwide increases in nitrogen (N) inputs to croplands have been and will continue to be an important contributor to growing more food. But a substantial portion of N inputs to croplands are not captured in harvested products and leave the field, contributing to air and water pollution. Whether the proportion of N inputs captured in harvest grows, shrinks, or remains unchanged will have important impacts on both food production and N pollution. We created a new global N input database (fertilizer, manure, fixation, deposition, and residues) that enables evaluation of trends in nitrogen use and recovery by country and by crop from the 1960s through 2007. These data show that despite growth in yields and increased N fertilization, differences in efficiency of N use between Organisation for Economic Co-operation and Development (OECD; http://www.oecd.org) and other countries have persisted over nearly 50 years and exhibit no sign of convergence. The high yield, high nitrogen input systems characteristic of rich countries have released large amounts of reactive N to the environment but have operated with greater efficiency - recovering a greater portion of added N in crops. Aggregate yields in OECD countries are 70% greater than in non-OECD countries on N input rates just 54% greater. Variation in recovery efficiency between countries suggests that there is scope for improvements through enhanced N delivery and capture in the world's low-yielding croplands and that increasing efficiency of N use is an important component of meeting food demand in the future. Key Points Efficiency of nitrogen use is greater for rich countries than for developing Efficiency of nitrogen use has exhibited little change over time Sustainable growth in food production requires advancement in many technologies © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77642
Appears in Collections: 气候变化事实与影响
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作者单位: Natural Resource Ecology Laboratory, Colorado State University, 1499 Campus Delivery, Fort Collins, CO 80523-1499, United States; Institute for Sustainable Resources, Queensland University of Technology, Brisbane, QLD, Australia; Nicholas School of the Environment, Duke University North, Durham, CA, United States
Recommended Citation:
Conant R,T,, Berdanier A,et al. Patterns and trends in nitrogen use and nitrogen recovery efficiency in world agriculture[J]. Global Biogeochemical Cycles,2013-01-01,27(2)