IBA EFFICIENCY ON MINI-CUTTING ROOTING FROM TEAK (Tectona grandis Linn F.) CLONES

Abstract

-This study aimed to evaluate IBA efficiency in mini-cuttings rooting based on four Tectona grandis clones. Vegetative samples were collected in a hydroponic mini-clonal hedge in Verde Novo reforestation company at Colider, Mato Grosso. A factorial arrangement (4 x 6) was utilized, based on Carapá, Ipê, GU5 and TB7 clones vs six IBA dosages (0, 1000, 2000, 4000, 8000 and 16000 mg L -1 ), in a randomized block design based on three repetitions and 16 mini-cuttings per experimental unit. Cutting evaluations were based on survival and rooting rates after greenhouse conditions, after shadow-house, and at sun exposure, besides, total height, collar diameter, aerial and root biomass were also analyzed. Results registered a 95,4% average survivance rate as well as a 91,8% rooting rate, considered as very high for this tree species. IBA dosages utilization did not produce a significative effect on rooting mini-cuttings from these investigated clones. However, there were different responses among clones, which suggests a genotypic effect.

QUALITY OF CLONAL SEEDLINGS OF Tectona grandis Linn F. ROOTED IN DIFFERENT CONCENTRATIONS OF INDOLEBUTYRIC ACID

“…Regarding survival, the results found in this study corroborate with that observed by Badilla et al (2016) in T. grandis, and with Oliveira et al (2016) in H. heptaphyllus, IBA does not influence the survival of minicuttings.…”

“…For T. grandis, there are some authors who report the use of IBA in the rooting of minicuttings, nonetheless, there are differences as to the necessity of its application, as demonstrated by Badilla et al (2016). In order to do so, one must take into account the juvenile degree of the vegetative material, the age of the ministumps, the genetic material differences and the environmental conditions (HARTMANN et al, 2011).…”

Minicepas de Myracrodruon urundeuva submetidas a três alturas de decepa e a aplicação de Cyperus rotundus

“…Fonseca (2016), ao estudar a propagação vegetativa por miniestaquia na espécie Guazuma ulmifolia, observou uma sobrevivência de 92,5% após 35 dias do plantio. Badilla et al (2016), em um trabalho realizado com miniestacas de quatro clones de Tectona grandis, observaram sobrevivência de 95% após 30 dias do estaqueamento.…”

Miniestaquia De Erva-Mate Em Quatro Épocas Do Ano

“…O ácido indolbutírico (IBA) é uma das principais substâncias indutoras, desencadeando a iniciação do enraizamento próximo à região do corte do propágulo por conta do transporte polar (DIAS et al, 2012;PIRES;BRONDANI, 2013;TAIZ;ZEIGER, 2013). Contudo, as concentrações recomendadas para aplicação dos reguladores vegetais podem variar de acordo com a espécie, estado de maturação do propágulo, condições ambientais, entre outros fatores (BORTOLINI et al, 2008;BADILLA et al, 2016).…”