Paclobutrazol e desponte no manejo da mangueira 'Palmer' no semiárido

Abstract

The mango tree is one of the main tropical fruit plants in Brazil, especially in the semiarid region into the national scene for the expansion of cultivated area, production volume, high yields and fruit quality, as well as the possibility of managing the production period with the use of plant growth regulators such as Paclobutrazol (PBZ). This study aimed to evaluate the effectiveness of different doses of PBZ, combined with the lopping practice, in the development of branches, flowering, fruiting, yield and postharvest quality of 'Palmer' mango, in the northern of Minas Gerais. The experiment was designed in randomized blocks in 2 x 5 factorial scheme, with and without lopping combined with five doses of PBZ (0.0, 0.3, 0.6, 0.9 and 1.2 g of active ingredient per meter linear canopy), with four replications, being one plant per plot. They were evaluated length and diameter of branches, number of inflorescences, number of fruits per branch, production and post-harvest quality of the fruit, which are length and diameter of fruit, average fruit weight and total weight of fruits per plant, maturity of pulp, pulp color and rind, firmness, juice yield, titratable acidity, soluble solids ratio (soluble solids / acidity) and pH. Data were subjected to analysis of variance and, when significant by F test, were subjected to regression analysis. It was observed reduction in branches growth with the application of PBZ with the lowest dose of 0.86 g (i.a). ml. The lopping associated with doses above 0.3 g (ia). ml PBZ provided greater flowering in mango tree. Paclobutrazol in mango tree, from 0.3 g (i.a).ml provided plants with higher yield per branch, smaller weight and fruit size, higher firmness, lower soluble solids and pH. However, the use of paclobutrazol and lopping management did not influence the productivity of 'Palmer' mango.