Produtividade da água de irrigação no cultivo de tomate grape submetido às estratégias de manejo

Abstract

Faced with climate uncertainty, an increase in the world population and need to produce food under low water availability, studies that point out alternatives for vegetable cultivation with reduced water consumption become extremely necessary. The objective of this work was to evaluate the implications the type of substrate, sprouting and irrigation management on water productivity, yield and physical-chemical quality of fruits in the cultivation of “grape” tomatoes (Solanum lycopersicum L.) in a protected environment. The tomato was cultivated with one, two, three and four rods. Additionally, it was verified the implications of managing fixed and variable irrigation on crop productivity and water consumption. The substrates used were: 100% local soil; 80% local soil + 20% rice husk charred; and commercial substrate Carolina Soil XVI. The plants were arranged in spacing of 1m x 0.70m and distributed according to an experimental design entirely randomized within an agricultural greenhouse. A formed 3x4x2 factorial scheme (3 substrates, 4 ways of conducting rods and 2 ways of manage irrigation) with 24 treatments and five replications, totaling 120 plots experimental. The productivity of irrigation water, plant yield and fruit quality. The results obtained indicate that there is no difference in the means of production variables depending on irrigation management strategies. How much to the way of driving, it was found that driving the grape tomato with just one stem reduces production compared to driving with 2, 3 and 4 rods. While the types of substrates influenced the total tomato mass obtained only when the plants were grown with 2 stems, in this case, plants grown in substrate commercial plants had a greater number of fruits. The increase in the number of branches per cultivated plant resulted in an increase in water productivity.