Abstract

CHATERLAN, Yoima et al. Papaya estimation of water requirements using the dual crop coefficient      . Rev Cie Téc Agr [online]. 2012, vol.21, n.3, pp. 12-17. ISSN 2071-0054.

Considering the increased activity of irrigation in the cultivation of papaya in recent years, interest is knowledge of the technical and agronomic necessary for proper irrigation scheduling based on the estimation of crop water requirements. For this we used the model SIMDualKc, which make the calculation of crop evapotranspiration (ET_c) and irrigation scheduling based on the methodology of the dual crop coefficient (K_c = K_cb + K_e). The research was conducted at the Experimental Station of Irrigation and Drainage, located in Alquízar, Havana, Cuba. The experiments were carried out between the periods march to november 1997. We used the Papaya (Carica papaya L) var. "Maradol red." The calibration consisted in the search for cultural factors at baseline for the different stages of crop development by minimizing the differences between the simulated and observed soil moisture content. Was evaluated for goodness of fit of the model's predictions SIMDualKc, realizandoce a series of statistical analysis. It can be concluded that the model can be used to generate alternative schedules irrigation to improve water conservation and productivity of papaya in these soil and climatic conditions.

Keywords : evaporation; transpiration; soil water balance; modeling; crop evapotranspiration.

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