Produção de porta-enxertos de cajueiro crioulos submetidos à adubação organomineral.

Abstract

The use of grafted seedlings is a cultural practice that aims at the optimization of agricultural production, and materials of organomineral origin added to the substrate help for their proper development. In this sense, the aim of this study was to evaluate the effect of the application of increasing doses of organomineral material on the development of native cashew rootstocks. During the stage of production of cashew tree rootstocks, the trial was conducted in an experimental area of the Federal University of Campina Grande (UFCG), Campus Pombal-PB, from July to September 2016. Using as substrate A sandy Franco texture soil. For the planting, they were used creole seeds, originating from cashew producers of the municipality of Livramento do Cariri Paraibano. Using a completely randomized design in 5x4 factorial, consisting of five increasing doses of organic matter (0.100, 200, 300 and 400g of bovine manure / 1 kg of soil) and four levels of mineral fertilization (0, 1, 2 and 3g / 1 kg of NPK soil) with 4 replicates. At 60 after sowing, the following determinations were made: plant size (cm), stem diameter (mm), leaf quantity, leaf area (cm2), fresh mass (leaf, stem, shoot), dry mass Leaf, stem and shoot) (g plant-1). There was an interactive effect only in the fresh mass of the aerial part, however, there was an individual effect for the organic fertilization factor in the following variables: plant height, diameter, fresh leaf mass, fresh stem mass, And 5% probability (p <0.01 and p <0.05) and mineral fertilization for leaf area, fresh and dry leaf mass and shoot dry matter. Based on the results obtained in this study, it can be concluded that organomineral fertilization provides positive effects for characteristics necessary for the production of rootstocks in cashew tree, and a better result was observed when using the organomineral combination (1g of mineral fertilizer and 200g of bovine manure to 1 kg of soil).