Evaluation of four cultivars of pineapple submitted to three increasing doses of NPK

• Grant number: 12/06346-3
• Support type: Regular Research Grants
• Duration: July 01, 2012 - September 30, 2014
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal researcher: Aloísio Costa Sampaio
• Grantee: Aloísio Costa Sampaio
• Home Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

The pineapple is a fruit that moves over $ 1 billion year. In 2011, samples were collected in Brazil 1.52 million fruit of 57,505 ha. The state of São Paulo was responsible for producing 92,300 units of fruit in 3170 ha. The NPK fertilizer formulated directly influences the quality of pineapple fruits. Knowing the dynamics of nutrients in plant and fruit is an important information to identify the period of greatest nutritional requirement by the plant, and thus improve the efficiency of fertilization practices. The objective of this study is to evaluate the development of four cultivars of pineapple and three doses of NPK fertilizer applied in coverage. The treatments were distributed in a randomized block in split plot. The cultivars 'Gold MD-2', 'Smooth Cayenne', 'Pérola' and 'IAC - Fantastico', were placed in the plot, and three doses of NPK formula 20-05-20 (70, 140 and 210 g plant -1) in the subplots. We applied the arrangement of plants in double rows spaced at 0.30m x 0.50m x 1.0m. Will be assessed during vegetative growth, leaf area (cm2), fresh and dry weight (g), leaf number, leaf length D (cm), natural flowering, seedling production (structures of propagation), and content and accumulation of macro and micronutrients, the physical and physicochemical: length and diameter (cm), fruit weight and crown (g), crown length (cm), pulp firmness (N), consistent, shear force and resilience, degree of translucency; maturation index (SS / TA), juice and pulp yield (%), pH, soluble solids - SS; Titratable Acidity - TA (g mL citric acid/100 acid), vitamin C, and economic analysis. (AU)