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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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Published in: | Ciência florestal 2022-07, Vol.30 (2) |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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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. |
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ISSN: | 0103-9954 |