Resumo

PEREZ LEIRA, Ramón; DOMINGUEZ GUTIERREZ, Jacqueline  e  PANEQUE RONDON, Pedro. The change of the sprinkler irrigation kit in pivots based on economic criteria for Cuba: Theoretical model. Rev Cie Téc Agr [online]. 2015, vol.24, n.3, pp. 22-27. ISSN 2071-0054.

This paper propose a theoretical model for determining the optimal moment to replace the kit of sprinkler irrigation and pressure regulators in a pivot. The model is based that the wear on the pressure regulators and nozzles make the decrease of the Irrigation Uniformity and this causes the yield loss. To compensate these losses an increase of irrigation depth is required to make up the deficit that occurs in areas of low delivery which generates in increased operating costs. Are considered in the model: costs for additional consumption of water and energy, maintenance and labor, and yield losses associated with areas with insufficient irrigation and over irrigation. The set of all these components is compared with the cost of the purchase and installation of a new sprinkler module, which allows the farmer to decide the right moment to make substitutions based on economic criteria.

Palavras-chave : pivot irrigation spray; sprinklers; model; cost; efficiency.

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