Eduardo Morais Vieira
Abstract:
The gabirobeira, a native species of the Cerrado Biome, has great ecological, social and economic importance, but the literature lacks technical information about the species that stimulates its domestication. Thus, the objective of this work was to evaluate the effect of phosphate and potassium fertilization and liming on the initial growth of Gabirobeira. For this, two experiments were set up under greenhouse conditions, both conducted in a completely randomized design, in a 5 x 5 factorial scheme, with four replications. P2O5 doses were applied: 0; 80; 160; 240 and 320 kg ha-1 as monoammonium phosphate and doses of K2O: 0; 60; 120; 180 and 240 kg ha-1 as potassium chloride; being the first experiment without and the second with limestone addition (717 kg ha-1). After 30, 60 and 90 days after planting (DAP), the following variables were evaluated: plant height, stem diameter and leaf number. Gabirobe plants respond to phosphate and potassium fertilization only for variable stem diameter during their initial growth, without correction of soil acidity. When soil acidity is corrected by lime application, they respond to phosphate fertilization for both variable height and diameter of the soil, with no response to potassium fertilization. When soil acidity correction is not performed, the variable number of leaves responds to potassium fertilization, showing no responses to phosphate fertilization during its initial growth. However, when correcting the acidity of these soils, this variable does not respond to phosphate and potassium fertilization. The application of limestone favored the growth of gabirobeiras seedlings for the variables height and diameter of the collection.
