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Mechanisms of Nitrogen Use in Maize

1
College of Agronomy, Gansu Agricultural University, Lanzhou 730010, China
2
Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou 730070, China
3
Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, USA
*
Authors to whom correspondence should be addressed.
Agronomy 2019, 9(12), 775; https://doi.org/10.3390/agronomy9120775
Received: 22 October 2019 / Revised: 11 November 2019 / Accepted: 18 November 2019 / Published: 20 November 2019
(This article belongs to the Special Issue Sustainable Cropping Systems)
Nitrogen (N) fertilizers are needed to enhance maize (Zea mays L.) production. Maize plays a major role in the livestock industry, biofuels, and human nutrition. Globally, less than one-half of applied N is recovered by maize. Although the application of N fertilizer can improve maize yield, excess N application due to low knowledge of the mechanisms of nitrogen use efficiency (NUE) poses serious threats to environmental sustainability. Increased environmental consciousness and an ever-increasing human population necessitate improved N utilization strategies in maize production. Enhanced understanding of the relationship between maize growth and productivity and the dynamics of maize N recovery are of major significance. A better understanding of the metabolic and genetic control of N acquisition and remobilization during vegetative and reproductive phases are important to improve maize productivity and to avoid excessive use of N fertilizers. Synchronizing the N supply with maize N demand throughout the growing season is key to improving NUE and reducing N loss to the environment. This review examines the mechanisms of N use in maize to provide a basis for driving innovations to improve NUE and reduce risks of negative environmental impacts. View Full-Text
Keywords: maize production; nitrogen use efficiency; nitrogen nutrition maize production; nitrogen use efficiency; nitrogen nutrition
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MDPI and ACS Style

Asibi, A.E.; Chai, Q.; A. Coulter, J. Mechanisms of Nitrogen Use in Maize. Agronomy 2019, 9, 775.

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