Ciencias Agropecuarias

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    Determinación del Kc Y Etp en las etapas fenológicas de (Allium cepa L) Variedad Burguesa, bajo las condiciones climáticas de Querochaca
    (2023-03) Salazar Altamirano, Ricardo Marcelo; Gutiérrez Albán, Alberto Cristóbal
    The research project with the theme: "Determination of Kc and Etp in the Phenological Stages of(Allium cepa L) Bourgeois Varietyunder the climatic conditions ofQuerochaca" was conducted in the province of Tungurahua, canton Cevallos on the grounds of the Faculty of Agricultural Sciences of Universidad Técnica de Ambato, at an altitude of 2865 masl, its geographical coordinates are 01°22'02" South latitude and 78°36'20" West longitude. The main basis ofthis research project isto establish the time that each phenological stage of the onion (Allium cepa L) Bourgeois Variety crop lasts, from sowing to harvest, to calculate the crop coefficient (Kc) and the crop evapotranspiration. For this purpose, it is important to know the incidence of climate during crop development. To obtain the installation coefficient Kc of the onion crop (Allium cepa L) Bourgeois Variety, it is necessary to know the value of the initial stage and development stage of the crop. The value of the installation coefficient (KTan) is obtained by multiplying the data of wind speed and relative humidity. The value of potential evapotranspiration (Etp) is obtained by multiplying the evaporation with the installation coefficient (KTan). The crop evapotranspiration value (Etc) is obtained by multiplying the potential evapotranspiration (Etp) with the crop coefficient (Kc). The value of the water balance is obtained by subtracting crop evapotranspiration (ETc) with precipitation. The onion (Allium cepa L) crop in the initial stage had a period of 28 days from sowing, which was on May 23th until June 20th, when it was transplanted. The development stage lasted 6 months fromtransplanting on June 21st to harvesting on December 20th . The value of the crop coefficient Kc at the initial stage was 0.7 and ended at a value of 1.04 at the harvest stage. In the initial stage the average value of the potential Evapotranspiration (Etp) was 1.7, the value of the crop evapotranspiration (Etc) was 1.24. In the development stage, the average value of potential Evapotranspiration (Etp) was 2.49, the value of crop Evapotranspiration (ETc) was 2.17