Avaliação da couve de folha em diferentes classes de solos e doses de bokashi.

Abstract

The increased consumption of leaf kale is linked to the various forms of use in cooking and more recently to the discovery of science as to its nutritional and medicinal properties. To this end, the culture of vegetables has the need to search more and more for information on the use of organic fertilizers and their effects in relation to the various soil classes existing in Brazil. In this context, the objective of this study was to evaluate the main relationships between three soils from the interior of the state of Paraiba in conjunction with different doses of bokashi in the development of Brassica oleracea var. acephala. The experiment was conducted in a greenhouse at the Experimental Farm of the Federal University of Campina Grande of the Center for Agro-Food Science and Technology - Pombal campus, in the municipality of São Domingos-PB between May and August 2018. Cabbage seeds leaf was sown in styrofoam trays of 128 cells to produce seedlings and after reaching two definitive leaves, were transplanted in pots with 8 L capacity, filled with soil and bokashi. The design was randomized blocks in a 3x5 factorial scheme, with three classes of soils (Luvissolo, Neossolo and Vertissolo) and five doses of bokashi (0, 50, 100, 150 and 200 g of N per pot) with four replications . Replicates wereused in the treatments. The experimental plots consisted of 3 lines, with 10 plants in each, totaling 30 plants per plot and 120 plants in each experiment. The spacing used was 1.0 m x 0.5 m. Five crops were harvested at 41, 48, 55, 63 and 80 days after transplanting. The physical parameters were evaluated: leaf number per plant, plant height, leaf area, stem diameter, number of total packets per plant, fresh and dry mass of the stem, fresh and dry mass of the root and root volume. The chemical characteristics were also evaluated: hydrogenation potential, electrical conductivity, organic matter, nitrogen, phosphorus, potassium and sodium. For the physical variables, it was concluded that the production of leaf kale, fertilized with bokashi, was compatible with conventional cultivation. In general, Luvissolo provided greater growth and phytomass of leaf kale compared to the soils Vertissolo and Neossolo. In the chemical variables it was concluded that fertilization with bokashi increased and / or remained the levels of N, P, Na, M.O. and C.E. of the soils and decreases the K content in soils. In general, Neossolo's chemical characteristics showed the same characteristics in Luvissolo and Vertissolo.