SciELO - Scientific Electronic Library Online

 
vol.23 número3Análise sensorial de genótipos de cenoura cultivados em sistema orgânico e convencionalEfeito da infecção precoce por Begomovirus com genoma bipartido em características de frutos de tomate industrial índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Horticultura Brasileira

versão impressa ISSN 0102-0536versão On-line ISSN 1806-9991

Resumo

PEREIRA, Claudio; JUNQUEIRA, Ana Maria R.  e  OLIVEIRA, Sebastião Alberto de. Nutrients balance and tip burn incidence in lettuce from hydroponic system - NFT . Hortic. Bras. [online]. 2005, vol.23, n.3, pp.810-814. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362005000300024.

Aiming to evaluate the effect of nutrients balance in lettuce tip burn incidence, an experiment was carried out in Brasília, Brazil, from October 2001 until June 2002, in two phases. During the first phase four solution concentrations (0.5; 1.5; 2.5 and 4.0 mS.cm-1) were evaluated to determine the concentration with the highest percentage of tip burn. During the second phase, a solution concentration of 4,0 mS.cm-1 and foliar applications of three calcium sources (CaCl2, CaB2® and CaNO3) were applied to plants to prevent tip burn. Nutritive solution proposed by Castellane and Araújo in 1995 was used in both phases. The evaluated parameters were percentage of plants with tip burn incidence, leaf nutrient concentration and plant fresh weight. In the first trial the more concentrated (4,0 mS.cm-1) and the less concentrated (0,5 mS.cm-1) nutritive solution presented the highest percentage of plants with the symptoms. In the second trial, the zinc deficiency induced by boron high concentration, was responsible for the symptoms. This was the reason why calcium leaf application was not effective on reducing foliar symptoms.

Palavras-chave : Lactuca sativa L.; DRIS; leaf nutrients analysis; nutritional balance; production.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons