Adubação foliar e axilar na produtividade e qualidade de abacaxi
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Data
2005-07-27
Autores
Maeda, Alexandra Sanae [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O Brasil é o terceiro maior produtor mundial de frutas, com uma produção estimada de 43 milhões de toneladas, o que corresponde a uma participação de 7,9% do total produzido no cenário mundial. A despeito da importância econômica desta cultura, a experimentação sobre adubação de abacaxizeiro é pequena no Brasil e, ainda menor, no Estado de São Paulo. Desta forma, dois experimentos foram desenvolvidos com a cultivar Smooth Cayenne com objetivo de avaliar os efeitos da aplicação de B e de Zn, em forma de quelato, ácido ou sal, aplicados via foliar, assim como doses de N e K aplicadas nas axilas do abacaxizeiro. Os experimentos foram realizados no município de Guaraçaí-SP, em solo com textura média. No experimento de adubação foliar, o delineamento experimental adotado foi o de blocos ao acaso com quatro repetições e dez tratamentos, utilizando-se de fontes para fornecer, em cada aplicação, 110 g ha-1 de B e 250 g ha-1 de Zn. Foram realizadas duas pulverizações, aos 7o e 9o mês após o plantio. No experimento de adubação axilar, o delineamento experimental adotado foi o de blocos ao acaso com quatro repetições, sendo os tratamentos constituídos por quatro doses de nitrogênio (0, 140, 280 e 420 kg ha-1 de N) na forma de uréia, e quatro doses de potássio (0, 140, 280 e 420 kg ha-1 de K2O) na forma de cloreto de potássio, constituindo um fatorial 4 x 4. A adubação nitrogenada e potássica foram realizadas nas axilas das plantas e parceladas em duas vezes, aos 7o e 9o mês após o plantio....
Brazil is the third world producing of pineapple fruits, with an estimated production of 43 million tons. It corresponds to a participation of 7,9% of the total produced in the world. In spite of the economic importance of this crop, the researches on this crop are small in Brazil mainly in São Paulo State. So, two trials were conducted with Smooth Cayenne cultivar aiming to evaluate the effects of B and Zn application, as quelate, acid or salt sources, applied through leaf, as well as, N and K applied in the bottom of old leaves. The experiments were accomplished in Guaraçaí-SP, in a medium textured soil. In both trials it was used a complete randomized blocks design with four repetitions. To leaf spray trail, in each application, 110 g ha-1 of B and 250 g ha-1 of Zn were applied in each spray accomplished in October of 2004 and in February of 2005. To N and K fertilization it was adopted a scheme in a factorial 4 x 4 with four doses of nitrogen (0, 140, 280 and 420 kg ha-1 of N) as urea, and four potassium doses (0, 140, 280 and 420 kg ha-1 of K2O) as potassium chloride. This fertilization was split in twice, in October and December of 2004. To leaf spray fertilization was not observed response to different sources of B and Zn related to content of total soluble solids, total titrable acidity, medium diameter of fruit, length of fruit without crown, maturation index and productivity. Only N and K leaf content were influenced by treatments. To N and K fertilization on old leaves was not observed response to medium diameter of fruit, length of fruit, total soluble solids and productivity of fruits...(Complete abstract, click electronic address below).
Brazil is the third world producing of pineapple fruits, with an estimated production of 43 million tons. It corresponds to a participation of 7,9% of the total produced in the world. In spite of the economic importance of this crop, the researches on this crop are small in Brazil mainly in São Paulo State. So, two trials were conducted with Smooth Cayenne cultivar aiming to evaluate the effects of B and Zn application, as quelate, acid or salt sources, applied through leaf, as well as, N and K applied in the bottom of old leaves. The experiments were accomplished in Guaraçaí-SP, in a medium textured soil. In both trials it was used a complete randomized blocks design with four repetitions. To leaf spray trail, in each application, 110 g ha-1 of B and 250 g ha-1 of Zn were applied in each spray accomplished in October of 2004 and in February of 2005. To N and K fertilization it was adopted a scheme in a factorial 4 x 4 with four doses of nitrogen (0, 140, 280 and 420 kg ha-1 of N) as urea, and four potassium doses (0, 140, 280 and 420 kg ha-1 of K2O) as potassium chloride. This fertilization was split in twice, in October and December of 2004. To leaf spray fertilization was not observed response to different sources of B and Zn related to content of total soluble solids, total titrable acidity, medium diameter of fruit, length of fruit without crown, maturation index and productivity. Only N and K leaf content were influenced by treatments. To N and K fertilization on old leaves was not observed response to medium diameter of fruit, length of fruit, total soluble solids and productivity of fruits...(Complete abstract, click electronic address below).
Descrição
Palavras-chave
Abacaxi - Qualidade, Adubação foliar, Adubação axilar, Ananas comosus L, Smooth cayenne, Mineral nutrition
Como citar
MAEDA, Alexandra Sanae. Adubação foliar e axilar na produtividade e qualidade de abacaxi. 2005. 43 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira, 2005.