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Agronomy 2018, 8(12), 304; https://doi.org/10.3390/agronomy8120304

Assessment of Fertilizer Management Strategies Aiming to Increase Nitrogen Use Efficiency of Wheat Grown Under Conservation Agriculture

1
Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Carretera a Delta s/n, Ejido Nuevo Leon, Mexicali, Baja California C. P. 21705, Mexico
2
Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), Km. 45, Carretera Mexico-Veracruz, El Batan, Texcoco Edo. de Mexico C. P. 56237, Mexico
*
Author to whom correspondence should be addressed.
Received: 14 November 2018 / Revised: 8 December 2018 / Accepted: 11 December 2018 / Published: 16 December 2018
(This article belongs to the Special Issue Fertilizer Application on Crop Yield)
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Abstract

Sustainable crop production systems can be attained by using inputs efficiently and nitrogen use efficiency (NUE) parameters are indirect measurements of sustainability of production systems. The objective of this study was to investigate the effect of selected nitrogen (N) management treatments on wheat yields, grain and straw N concentration, and NUE parameters, under conservation agriculture (CA). The present study was conducted at the International Maize and Wheat Improvement Center (CIMMYT), in northwest, Mexico. Seventeen treatments were tested which included urea sources, timing, and methods of fertilizer application. Orthogonal contrasts were used to compare groups of treatments and correlation and regression analyses were used to look at the relationships between wheat yields and NUE parameters. Contrasts run to compare wheat yields or agronomic efficiency of N (AEN) performed similarly. Sources of urea or timing of fertilizer application had a significant effect on yields or AEN (p > 0.050). However, methods of application resulted in a highly significant (p < 0.0001) difference on wheat yields and agronomic efficiency of N. NUE parameters recorded in this study were average but the productivity associated to NUE levels was high. Results in this study indicate that wheat grew under non-critically limiting N supply levels, suggesting that N mineralization and reduced N losses from the soil under CA contributed to this favorable nutritional condition, thus minimizing the importance of N management practices under stable, mature CA systems. View Full-Text
Keywords: conservation agriculture; NUE; nitrogen recovery efficiency; nitrogen physiological recovery; wheat yields; Agrotain® urea conservation agriculture; NUE; nitrogen recovery efficiency; nitrogen physiological recovery; wheat yields; Agrotain® urea
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Santillano-Cázares, J.; Núñez-Ramírez, F.; Ruíz-Alvarado, C.; Cárdenas-Castañeda, M.E.; Ortiz-Monasterio, I. Assessment of Fertilizer Management Strategies Aiming to Increase Nitrogen Use Efficiency of Wheat Grown Under Conservation Agriculture. Agronomy 2018, 8, 304.

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