Crescimento e produção da bananeira em função da adubação com nitrogênio, fósforo e potássio na Chapada do Apodi.

• Autor(a) principal: Nunes, Ana Paula Andrade
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/5016
• topic: Plantas - Efeito dos minerais; Musa; Adubos e fertilizantes; Plantas - Nutrição

This research aimed to study the effect of different NPK rates related to growth and production of banana tree ‘Pacovan Apodi’, carrying out an experiment on the experimental field of enterprise FRUTACOR, in the district of Cercado do Meio, located in the municipality of Quixeré, Ceará State (Northeast Brazil). The experiment was conducted in September 2008, using seedlings of banana tree ‘Pacovan Apodi’, developed from tissue culture and placed in a 3,5 m planting space in double rows, 1,9 m in single rows and 1,6 m between simple plant lines. Experimental plots consisted of 8 plants, considering 4 centralized plants as useful. Five doses of nitrogen (70, 490, 700, 910 and 1329 kg N ha-1), five of phosphorus (17, 122, 174, 227 and 332 kg P2O5 ha-1) and five of potassium (44, 310, 443, 576 and 842 kg K2O ha-1) were arranged according to experimental matrix Pan Puebla II and distributed using the experimental design of randomized blocks, with five replications. The nitrogen source used was urea, phosphorus was the mono-ammonium phosphate, and potassium was potassium chloride. NPK doses were divided in seven applications, being the first one conducted in October 2008 and the other monthly. Biometric data (pseudostem length, pseudostem diameter and number of leaves) was collected from 120 to 210 days after transplanting (DAT). Leaves were collected from each plot for analysis of NPK nutrient content. At 305 DAT grapes were harvested, tumbled down, weighed, evaluated and related to the number of palms and also the number of fruits. The combination of doses which promoted the best growth results and production of banana tree ‘Pacovan Apodi’ was composed by 490, 227 and 576 kg ha-1 cycle-1. Increase in N rates affected pseudostem length and number of palms. Phosphate fertlization reached positive results facing the number of leaves, weight of bunch and productivity, and banana tree ‘Pacovan Apodi’ presented no answer to potassium fertilization considering characteristics evaluated on the experiment. There was no significant effect of N, P2O5 and K2O rates on foliar nutrient concentration.