Manejo da irrigação e fertirrigação com nitrogênio sobre as características químicas da videira 'Niágara Rosada'

Abstract

The quality of the grape can respond to irrigation and N fertilization adjustment. So, this research aimed to study the effect of irrigation management and doses of nitrogen on 'Niagara Rosada' grape quality in Colatina (ES) municipality. It was evaluated three doses of nitrogen applied by fertigation: 35, 70 and 140g plant -1 and four strategies of irrigation management. From the beginning of the experiment until the stage of maturation, all treatments received the same water depth, increasing soil moisture at field capacity (M1=100%). After this period, it was evaluated three strategies for irrigation management: M2=67%, M3=33% and M4=0% of the depth corresponding to the M1 treatment. It was appraised the content of soluble solids (SS), pH and acidity (AT). The results indicated that the treatments under water stress, in the rates of 70 and 140g plant-1 presented larger rates of SS and pH of the berries and decreasing values of AT.