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Doses of calcium sulphate increase the peroxidase activity and the rooting of eucalyptus clones

Due to the demand of the forest-based sector and the difficulty for providing seedlings of Eucalyptus spp. produced by cutting rooting, the objective of this study was to evaluate if doses of a calcium sulphate-based fertilizer increase the peroxidase activity and the rooting of two eucalyptus clone...

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Bibliographic Details
Published in:Ciência florestal 2022-07, Vol.30 (2)
Main Authors: Estevez, Rogério Lopes, Chambo, Ana Paula Sartório, Stangarlin, José Renato, Kuhn, Odair José
Format: Article
Language:English
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Summary:Due to the demand of the forest-based sector and the difficulty for providing seedlings of Eucalyptus spp. produced by cutting rooting, the objective of this study was to evaluate if doses of a calcium sulphate-based fertilizer increase the peroxidase activity and the rooting of two eucalyptus clones. The study was conducted using cuttings of the eucalyptus clones IPB22 and IBP26 ( Eucalyptus grandis x Eucalyptus urophylla ), in which bi-weekly applications of the fertilizer were carried out in the aerial part of the plants for 120 days at dosages of 0, 40, 80, 160 and 320 g L-1 in indoor experimental nursery. The analyzed variables were shoot height and diameter, rooting percentage and peroxidase activity. We observed that the use of doses of calcium sulphate based fertilizer, mainly 160 and 320 g L-1, increased the height, diameter, rooting and peroxidase of the mini-cuttings for both clones. Thus, this fertilizer induces the peroxidase activity, contributing to a better development of eucalyptus mini-cuttings. Diante da demanda do setor florestal em fornecer mudas de Eucalyptus sp. e devido à dificuldade de enraizamento a partir de estacas, o presente trabalho objetivou avaliar se doses de um fertilizante mineral à base de sulfato de cálcio incrementa a atividade de peroxidase e o desenvolvimento radicular de dois clones de eucalipto. O estudo foi conduzido utilizando os clones de eucalipto IPB22 e IBP26 ( Eucalyptus grandis x Eucalyptus urophylla ), nos quais foram realizadas aplicações quinzenais do fertilizante, por 120 dias na parte aérea das plantas, nas dosagens de 0, 40, 80, 160 e 320 g L-1 em casa de vegetação. As variáveis analisadas foram altura da parte aérea, diâmetro do colo, porcentagem de enraizamento e atividade da enzima peroxidase. A aplicação do fertilizante à base de sulfato de cálcio, principalmente em 160 e 320 g L-1, resultou em maior altura, diâmetro de colo, enraizamento das miniestacas e atividade de peroxidase para os dois clones estudados. Dessa forma, conclui-se que esse fertilizante induz a atividade de peroxidase, contribuindo para melhor desenvolvimento de miniestacas de clones de eucalipto.
ISSN:0103-9954