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On-line version ISSN 1806-9088
GOULART, Patrícia Bueno; XAVIER, Aloisio and CARDOSO, Narcisio Zeferino. Effect of the growth regulators IBA and ANA on the rooting of minicuttings of Eucalyptus grandis x Eucalyptus urophylla clones. Rev. Árvore [online]. 2008, vol.32, n.6, pp. 1051-1058. ISSN 1806-9088. http://dx.doi.org/10.1590/S0100-67622008000600010.
The objective of the present work was to evaluate the efficiency of the growth regulators IBA and ANA on the rooting of minicuttings of four clones of Eucalyptus grandis x E. urophylla. The minicuttings were collected in a clonal minigarden under a hydro phonic system in small gutters. The experiment was arranged in a randomized design with plots in a 2 x 5 x 4 factorial constituted of two growth regulators (IBA and ANA), five doses of each growth regulator and four clones, in four repetitions and plots of 16 plants per repetition. The evaluations were carried out in a greenhouse, a shade house and in the open sun for survival rate, height, stem diameter and dry mass of the aerial and root parts of the rooted minicuttings. It was concluded that using IBA in doses between 500 and 2,000 mg L-1 was more efficient than using ANA for the four clones studied.
Keywords : Minicutting; stem-cutting rooting; vegetative propagation.