EFEITO DE DIFERENTES NÍVEIS DE IRRIGAÇÃO BASEADAS EM FRAÇÕES DO TANQUE CLASSE SOBRE A PRODUÇÃO DE RABANETE (Raphanus sativus L.)

The radish (Raphanus sativus L.) is a herbaceous plant which roots present high nutritious value. One of the more used methods of the cultures evapotranspiration estimative (Eto) is the pan evaporation. This method integrated the effects of solar radiation, wind, temperature and relative humidity based on the water evaporation of a free surface. This work studied the effect of different irrigation levels, based on pan evaporation (ECA) - 80% ECA; 100% ECA; 120% ECA and hydric stress (0% ECA), about the 'Crinson Giant' radish production cultivated in pots. The fractions of pan evaporation tested didn't cause a reduction in the radish production in relation to the total irrigation (100% ECA). However the plants submitted to the hydric stress (0% ECA) had presented a reduction in dry matter of 42% and 64% in aerial part and roots, respectively, when compared to the control (100% ECA)