resposta à adubação com uréia, cloreto de potássio e ácido bórico em mudas abacaxizeiro'smooth cayenne' response to fertilization with urea, potassium chloride and boric acid in the 'smooth cayenne' pineapple plants

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ID: 182720
2007
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Abstract
Mudas do abacaxizeiro (Ananas comosus L.), cultivar Smooth Cayenne, obtidas por seccionamento de caule, foram submetidas à adubação foliar com soluções em diferentes concentrações de uréia, KCl e H3BO3. O delineamento utilizado foi fatorial fracionado do tipo (1/5)5³, com três tipos de adubo e cinco concentrações, num total de 25 tratamentos, que consistiram de combinações de concentrações de 0; 2,5; 5,0; 7,5 e 10 g L-1 de uréia e KCl, e 0; 0,5; 1,0; 1,5 e 2,0 g L-1 de H3BO3. Os tratamentos foram iniciados nove semanas após o plantio das seções do caule, com 26 pulverizações semanais para a uréia e KCl e 4 pulverizações mensais para o H3BO3. Verificou-se crescimento linear positivo para as características: altura das brotações, número de folhas, área foliar, massa seca e fresca das mudas, em resposta a níveis crescentes de uréia. Não foi observado efeito do KCl e H3BO3 para nenhuma das características de crescimento avaliadas. As mudas adubadas com 10 g L-1 de uréia atingiram altura de 40 cm e massa fresca de 242 g no 9º mês após o plantio das seções.
Suckers of the pineapple plant (Ananas comosus L.), Smooth Cayenne cv., obtained by stem sectioning, were submitted to leaf fertilization with solutions at different concentrations of urea, KCl and H3BO3. The fractionated factorial design of the type (1/5)5³ was used, with three fertilizer types and five concentrations, totalizing 25 treatments that consisted of combination of concentrations (0; 2.5; 5.0; 7.5) and 10 g L-1 of urea and KCl, as well as 0; 0.5; 1.0; 1.5 and 2.0 g L-1 of H3BO3. The treatments began nine weeks after planting the stem sections. Twenty six sprays of urea and KCl were weekly applied as well as four monthly sprays of H3BO3. Positive linear growth was verified for the following characteristics: sprouting heights, leaf numbers, leaf area, dry and fresh matter of the suckers in response to increasing urea levels. No effect of KCl and H3BO3 were observed for the growth characteristics under evaluation. The suckers fertilized with 10 g L-1 urea reached 40 cm height and 242 g fresh matter at the 9th month after planting the sections.
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Authors ;Ruimário Inácio Coelho;Almy Junior Cordeiro de Carvalho;Claudia Sales Marinho;Jose Carlos Lopes;Patrícia Gomes de Oliveira Pessanha
Journal technocom
Year 2007
DOI
10.1590/S0100-29452007000100033
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000100033
Keywords
ananas comosus

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