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A Roadmap for Lowering Crop Nitrogen Requirement.

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Swarbreck, Stéphanie M 
Wang, Meng 
Wang, Yuan 
Kindred, Daniel 
Sylvester-Bradley, Roger 

Abstract

Increasing nitrogen fertilizer applications have sustained a growing world population in the 20th century. However, to avoid any further associated environmental damage, new sustainable agronomic practices together with new cultivars must be developed. To date the concept of nitrogen use efficiency (NUE) has been useful in quantifying the processes of nitrogen uptake and utilization, but we propose a shift in focus to consider nitrogen responsiveness as a more appropriate trait to select varieties with lower nitrogen requirements. We provide a roadmap to integrate the regulation of nitrogen uptake and assimilation into varietal selection and crop breeding programs. The overall goal is to reduce nitrogen inputs by farmers growing crops in contrasting cropping systems around the world, while sustaining yields and reducing greenhouse gas (GHG) emissions.

Description

Keywords

nitrogen, nitrogen demand, nitrogen use efficiency, response, wheat, yield, Agriculture, Crops, Agricultural, Fertilizers, Nitrogen

Journal Title

Trends Plant Sci

Conference Name

Journal ISSN

1360-1385
1878-4372

Volume Title

24

Publisher

Elsevier BV
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/N013441/1)
Biotechnology and Biological Sciences Research Council (BB/N013484/1)
Biotechnology and Biological Sciences Research Council (BB/P027970/1)
Biotechnology and Biological Sciences Research Council (BB/R019916/1)