Produtividade da couve-flor irrigada por gotejamento, sob sistema convencional e plantio direto

Abstract

Cauliflower (Brassica aleracea), a vegetable planted in various parts of the world, is an option for the diversification of family agriculture, as well as having a high nutritional value, there are cultivars adapted to the hottest conditions of the year and can be produced during the whole year. The objective of this work was to evaluate the productivity of cauliflower in direct planting system in succession to different straw and the drip irrigation system. The experimental design was completely randomized in factorial arrangement (4x2) with 4 replicates. The treatments consisted of no-tillage on Crotalaria (C), Braquiaria (B), and consortium of Crotalaria with Braquiaria (C + B) and a control treatment conducted in a conventional system (SC); the irrigation method factor had two levels, surface and subsurface drip irrigation system. The work was developed in two stages, in the first one the crops of soil cover were cultivated and in the second, the cultivation of the cauliflower, cv. Sharon submitted to the different modes of irrigation. Each experimental unit consisted of 20 plants, with spacing of 0.8 m between rows and 0.5 m between plants. Irrigation management was based on tensiometry. The variables analyzed were fresh mass and commercial productivity of the inflorescence and the floret and the diameter of the inflorescence. The data were submitted to statistical analysis using the Tukey test at 5%. The consortium of Crotalaria with Braquiaria presented itself as the alternative that provided better soil moisture conditions, efficient use of water resources and higher productivity. Regarding irrigation systems, there was no significant difference in cauliflower productivity between surface and subsurface drip.