Emerging and established technologies to Increase nitrogen use efficiency of cereals

• Autores: Herrera, Juan Manuel; Rubio, Gerardo; Levy Häner, Lilia; Delgado, Jorge A.; Lucho Constantino, Carlos A.; Islas Valdez, Samira; Pellet, Didier
• Año de publicación: 2016
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Agronomy; Vol.6, no.2, 25; 1-19; http://www.mdpi.com/
• Materia: NITROGEN USE EFFICIENCY; NANOFERTILIZERS; RECYCLED FERTILIZER; SLOW N REALISED FERTILIZERS
• Institución: Universidad de Buenos Aires. Facultad de Agronomía

Fil: Herrera, Juan Manuel. Agroscope. Route de Duillier 50, Nyon 1260, Switzerland.
Fil: Rubio, Gerardo. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.
Fil: Rubio, Gerardo. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.
Fil: Levy Häner, Lilia. Agroscope. Route de Duillier 50, Nyon 1260, Switzerland.
Fil: Delgado, Jorge A. United States Department of Agriculture, Fort Collins, CO 80526, USA.
Fil: Lucho Constantino, Carlos A. Universidad Autónoma del Estado de Hidalgo. Chemical Research Center. Hidalgo, Mexico.
Fil: Islas Valdez, Samira. Universidad Autónoma de Madrid. Doctoral programme in Agricultural Chemistry. Madrid, España.
Fil: Pellet, Didier. Agroscope. Route de Duillier 50, Nyon 1260, Switzerland.
Nitrogen (N) fertilizers are one of the most expensive inputs in agricultural settings. Additionally, the loss of N increases costs, contributes to soil acidification, and causes off-site pollution of the air, groundwater and waterways. This study reviews current knowledge about technologies for N fertilization with potential to increase N use efficiency and reduce its negative effects on the environment. Classic inorganic sources such as urea and ammonium sulfate are the major sources utilized, while controlled N release fertilizers have not been significantly adopted for cereals and oil crops. Microorganisms, with the exception of Rhizobium sp. in soybeans, are also not widely used nowadays (e.g., plant growth-promoting bacteria and cynobacteria). The interest in implementing new N fertilization knowledge is stimulating the development of sensors to diagnose the N status and decision support systems for integrating several variables to optimize sources, rates and methods of application. Among potential new technologies we identified the incipient development of nanofertilizers, nutrient formulations to coat seeds, and recycled nutrients. Furthermore, increasing concern about the environmental consequences of N may facilitate the implementation of innovations outside the farm such as more effective regulations to guide N fertilization and methods to manufacture N fertilizers that are more energy-efficient and less CO2 equivalent emitting.