Quantifying yield and water productivity gaps in an irrigation district under rotational delivery schedule

Authors
Angella, Gabriel Augusto; García Vila, M.; Lopez, Juana Maria; Barraza, Gabriela Alejandra; Salgado, Ramiro; Prieto Angueira, Salvador; Tomsic, Pablo Daniel; Fereres, E.
Publication Year
2016
Language
English
Format
article
Status
Published version
Description
Removal of irrigation network limitations under a rotational delivery schedule has been focused on improving infrastructures without paying sufficient attention to improving management. We developed a methodology to assess the yield and water productivity gaps in the Río Dulce irrigation system, Santiago del Estero, Argentina. The AquaCrop model was used to determine the potential and attainable yields of maize and cotton under different water management scenarios. Actual yields and irrigation practices were determined by field surveys and farmers interviews. The AquaGIS tool facilitated the assessment of the spatial and temporal variations in yield using a daily climatic database of 26 years. The average yield gap (potential minus actual) amounted to 6 t ha−1 in maize and 2 t ha−1 in cotton. The average water productivity gap was 7 kg ha−1 mm−1 in maize and 2 kg ha−1 mm−1 in cotton. By a more effective use of the rotational delivery schedule, the yield gap could be partially closed, in particular if associated with other agronomic practices, namely nitrogen fertilization. The approach demonstrated the potential of combining field data collection with the use of AquaCrop to quantify the yield and WP gaps, and to propose management recommendations for closing the gaps.
EEA Santiago del Estero
Fil: Angella, Gabriel Augusto. INTA. Estación Experimental Agropecuaria Santiago del Estero; Argentina. Universidad Nacional de Santiago del Estero.Facultad de Agronomía y Agroindustrias; Argentina
Fil: García Vila, M. Universidad de Córdoba. Departamento de Agronomía; España
Fil: Lopez, Juana Maria. INTA. Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Barraza, Gabriela Alejandra. INTA. Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Salgado, Ramiro. INTA. Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Prieto Angueira, Salvador. INTA. Estación Experimental Agropecuaria Santiago del Estero; Argentina. Universidad Nacional de Santiago del Estero.Facultad de Agronomía y Agroindustrias; Argentina
Fil: Tomsic, Pablo Daniel. INTA. Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Fereres, E. Universidad de Córdoba. Departamento de Agronomía; España. Consejo Superior de Investigaciones Científica (CSIC). Instituto de Agricultura Sostenible (IAS); España
Source
Irrigation science 34 (1) : 71–83. (January 2016)
Subject
Riego
Calendario de los Riegos
Riego Rotativo
Rendimiento
Agua
Irrigation
Irrigation Scheduling
Rotation Irrigation
Yields
Water
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/2606