Resposta da bananeira cv. d’angola sob diferentes densidades de plantas, níveis de água e adubação

Abstract

This study aimed to evaluate the performance of biometric components, water use efficiency, productivity and distribution of the root system of banana cv. D'angola under different plant densities, the different levels of irrigation and fertilizers. The study was conducted from June 2013 to November 2014. The spacing adopted was 2.5 m between plants and 2.5 m between rows of plants, being used a drip irrigation system, with three emitters per plant. The experimental design was randomized blocks with split-split plots installments, the installments fertilization levels (1.0, 1.25 and 1.5 of the recommended dose), the subplots the two irrigation levels (60 and 100% of evapotranspiration culture) and sub-subplots two planting densities (one and two plants per clump). Fertilization influencing the production cycle. Irrigation levels affected the efficiency of the use of variable water. Planting density influenced most biometric components. Increased planting 1600 plants ha-1 and 3200 plants ha-1 change density promoted the crop cycle, with an increase in the production cycle, both from planting to flowering, as the flowering planting. Two plants per plant increased grape bunches and the productivity and 69.53 end 69.61%, equivalent to an increase of 11.32 and 12.15 t ha-1. The increase in planting density, reduces the length and diameter of the fruit, however, expected to increase the maturation index. The total root length and total length density of two plants per clump (3200 plants ha-1), 32% were larger than the density of a plant by plant (1600 plants ha-1).