Dose of trinexapac-ethyl and the age of seedling influence the stimulatory effect in Eucalyptus

da Silveira M. R. F., . and Bacha A. L., . and Braga A. F., . and Carrega W. C., . and da Costa Aguiar Alves P. L., . Dose of trinexapac-ethyl and the age of seedling influence the stimulatory effect in Eucalyptus. pp. 41-48. ISSN 0128-1283

Trinexapac-ethyl (TE) has recently been shown to have a stimulatory effect on the initial growth of Eucalyptus seedlings. However the optimal dose and seedling age at which TE should be applied has not been assessed. The objective of our study was to evaluate the effects of sub-doses of TE on the initial growth of eight Eucalyptus clones. The experiment was conducted in an open area. The treatments were arranged in an 8 3 factorial scheme meaning eight Eucalyptus clones and three doses of TE (0 15 and 30 g a.i. ha-) sprayed at 70 days after planting. Plant height stem diameter shoot and root dry mass and leaf area were evaluated. Eucalyptus clones differed in their growth regardless TE application. TE did not negatively affect the growth of any clones but doses used in our study were not sufficient to give a significant positive effect on growth when applied at 70 days after planting. We suggest that older Eucalyptus seedlings need higher doses of TE to reveal potential stimulatory effects on growth of the plants.

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Abstract

Trinexapac-ethyl (TE) has recently been shown to have a stimulatory effect on the initial growth of Eucalyptus seedlings. However the optimal dose and seedling age at which TE should be applied has not been assessed. The objective of our study was to evaluate the effects of sub-doses of TE on the initial growth of eight Eucalyptus clones. The experiment was conducted in an open area. The treatments were arranged in an 8 3 factorial scheme meaning eight Eucalyptus clones and three doses of TE (0 15 and 30 g a.i. ha-) sprayed at 70 days after planting. Plant height stem diameter shoot and root dry mass and leaf area were evaluated. Eucalyptus clones differed in their growth regardless TE application. TE did not negatively affect the growth of any clones but doses used in our study were not sufficient to give a significant positive effect on growth when applied at 70 days after planting. We suggest that older Eucalyptus seedlings need higher doses of TE to reveal potential stimulatory effects on growth of the plants.

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Item Type:	Article
AGROVOC Term:	Eucalyptus
AGROVOC Term:	Pot experimentation
AGROVOC Term:	Seedlings
AGROVOC Term:	Plant growth regulators
AGROVOC Term:	Gibberellins
AGROVOC Term:	Age
AGROVOC Term:	Dosage effects
AGROVOC Term:	Physiological stimulation
AGROVOC Term:	Growth
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9597

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