Determinação do coeficiente de cultura (Kc) para cenoura (Daucus carota L.) pelo método do balanço hídrico

Abstract

By using the mass conservation law in a control volume of soil, the major factors involved in the estimation of the crop evapotranspiration in carrot (Vaucuz canata L.) were analysed. The values of crop evapotranspiration obtained by this procedure were correlated with data obtained from a Class A pan, with the objective of determining coefficients that could make the estimation of the crop evapotranspiration using the evaporation pan only. These coefficients, called crop coefficients (.Kc), were obtained during the stages of crop development, mid-season and late season and the resulting mean values were 0,77; 0,99 and 0,86, respectively. It was also determined a mean crop coefficient (Kc) for the whole growing season and the resulting mean value was 0,87 that can be taken as a basic value for irrigation purposes of the carrot crop.