Uso de estufim e de AIB para o enraizamento de miniestacas de Eucalyptus urophylla S. T. Blake × Eucalyptus pellita F. Muell

Ciencia Florestal

article

Fabiana Miranda Rocha¹  Miranda Titon²  Sula Janaína de Oliveira Fernandes³  Paulo Henrique Rodrigues dos Santos⁴  Marcelo Luiz de Laia²  Claudilene Aparecida Alves Pena⁵ 

[1] Analista Socioambiental;Universidade Federal dos Vales do Jequitinhonha e Mucuri;Associação IMETAME;Houer Consultoria e Concessões Ltda;Aperam BioEnergia Ltda

关键词: Cloning;    Auxin;    Clonal mini-garden;    Adventitious rooting;    Myrtaceae;   

DOI  :  10.5902/1980509865873

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

The genus Eucalyptus has great importance in forest plantations. However, some species and clones of this genus present difficulties in the seedling production process by the rooting cuttings. Some alternatives have been used to overcome the rooting recalcitrance, such as the use of growth regulators and the use of mini-tunnels in the clonal mini-garden. The objective of this work was to evaluate the effect of the permanence time of mini-ceps under the mini-tunnel and of different concentrations of indole-3-butyric acid (IBA) on the rooting of mini-cuttings of a hybrid clone of Eucalyptus urophylla × Eucalyptus pellita. Four IBA concentrations and a control treatment (0, 1.000, 2.000, 4.000 and 8.000 mg L-1) and two times in a mini-tunnel (40 and 70 days) were tested. The seedlings produced with higher concentrations of AIB presented mean height and root collar diameter greater than those without the presence of auxin at the exit of the greenhouse. The dry mass of the aerial part presented higher values for the shortest period of mini-tunnel at the exit of the greenhouse. Higher IBA concentrations provided an increase in the number of mini-cuttings rooted at the exit of the greenhouse and area under full sun. The use of 8.000 mg L-1 of IBA increased the percentage of roots considered optimal, in the two tested mini-tunnel times, and reduced the callus formation, being efficient for rooting in general terms, reaching 95 % at the exit of the area under full sun. The time of use of the greenhouse in the clonal mini-garden did not significantly influence the production of Eucalyptus urophylla × Eucalyptus pellita seedlings under the conditions analyzed.

【 授权许可】

CC BY-NC