Absorcion de nitrogeno (15N) por el cultivo de cebada en relacion con la disponibilidad de agua en "El Bajio", Guanajuato, Mexico | Nitrogen (15N) uptake by barley in relation to water availability in "El Bajio", Guanajuato, Mexico
2002
Vera-Nunez, J.A. | Grageda-Cabrera, O.A. | Vuelvas-Cisneros, M.A. | Pena-Cabriales, J.J.
The effect of three irrigation calendars: 0-46, 0-40-70, and 0-40-70-90 days after sowing (das) and three N fertilization rates: 120, 180, and 240 kg ha(-1) applied at sowing were studied using 15N and neutron probe on barley (Hordeum vulgare L.). A split plot design with four replicates was used. The results showed that the efficiency use of N-fertilizer in the different irrigation calendars under study was similar (< 22%). The highest proportion of nitrogen derived from fertilizer was low (< 40%) and occurred between 52 to 66 das. Interestingly, eliminating irrigation during flowering stage resulted in an increase in N absorption from fertilizer. In conclusion, a management of these inputs, two irrigation periods and 180 kg N ha(-1) resulted in better management in barley production system.
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