Produção e nutrição do Mamoeiro "Caliman 01" em função da adubação com NPK

• Autor(a) principal: Albuquerque, Gustavo Henrique da Silva
• Data de Publicação: 2010
• 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/19337
• topic: Agronomia; Produtividade; Diagnose foliar; Carica papaya; Productivity; Leaf diagnosis

Due to social and economic importance that the papaya crop has for the Chapada Apodi and lack of research on fertilization in the region, especially with hybrids. This research aimed to study the effect of different NPK on yield components and nutrient content of papaya hybrid 'Caliman 01', took place this experiment in the area of WG FRUTICULTURA company, located in the municipality of Baraúna, State of Rio Grande Norte. The seedlings were transplanted in November 2008, spaced 4.0 x 2.0 m. The plots consisted of six plants, considering how useful plot the four central plants. Five levels of nitrogen (94, 590, 837, 1088 and 1575 kg N ha -1) as urea, five levels of phosphorus (10, 72, 96, 133 and 195 kg P2O5 ha -1) in the form of monoammonium phosphate and five levels of potassium (75, 527, 752, 978 and 1429 kg K2O ha -1) in the form of potassium chloride, combined according to experimental matrix Pan Puebla II and distributed in randomized block design with five replications. The levels of NK were divided into thirty applications, the first being held in December 2008 and repeated fortnightly, and P were distributed in two applications in foundation next to the plants, the first application 75 days after transplanting (DAT) and the second application 150 DAT. At 110 DAT were collected from the petiole and blade of plants, to analyze the levels of NPK. During eight months held collections of fruits, determining the number and weight of them for treatment. NPK doses provided the best results of yield components of papaya were 1088, 72 and 527 kg ha -1, respectively. Increments in doses of N increased linearly the number of fruits, plant production and productivity, while P and K decreased, quadratic and linear respectively. The average levels of N and K in limbo were 269% and 4.5% higher than the petiole, while the P levels in limbo were 62.5% lower than the petiole. The combination of N, P2O5 and K2O of 590-72-75 kg ha -1 in papaya gave the best results with a higher rate of return.