Este trabalho objetivou avaliar o efeito da variação de altura e diâmetro de colo de mudas clonais
do híbrido de Eucalyptus grandis x E. urophylla sobre o crescimento após o plantio nos sítios de Aracruz-ES,
Mucuri-BA, Montanha-ES e Carlos Chagas-MG. As classes selecionadas foram: mudas altas e grossas (AG),
mudas altas com diâmetro médio (AM), mudas médias com diâmetro grosso (MG), mudas médias com diâmetro
médio (MM), mudas pequenas com diâmetro médio (PM) e mudas pequenas com diâmetro fino (PF). Os valores
dessas classes foram: altura: A (31-40 cm), M (21-30 cm) e P (10-20 cm); diâmetro: G (3,1-4,0 mm), M
(2,1-3,0 mm) e F (1,5-2,0 mm). As mudas, 90 dias após o transplantio nos tubetes e consideradas rustificadas,
foram plantadas e as avaliações de altura (H) e diâmetro (D), feitas no 1°, 2°, 3°, 6° e 12° meses. A massa
de matéria seca de folhas, lenho, casca, galhos e raízes finas, médias e grossas foram avaliadas no sexto mês.
Mudas com maiores dimensões de altura e diâmetro apresentaram maior crescimento inicial, mas as diferenças
tenderam a diminuir ao longo do tempo. O sítio de Carlos Chagas teve as piores condições para o crescimento
das plantas.
This work aimed to evaluate the height and root collar diameter effects of the hybrid Eucalyptus
grandis x E. urophylla cuttings on the growth after planting in the Aracruz-ES, Mucuri-BA, Montanha-ES and
Carlos Chagas-MG sites. The selected classes were: high cuttings with thick root collar diameter (AG), high cuttings
with averaged size diameter (AM), average height with thick diameter ( MG), average height and average
diameter (MM) , low cutting with average size diameter (PM) and low cutting with fine diameter roots (PF).
The values of the classes were: height- A (31-40 cm), M (21-30 cm) and P (10-20 cm); root collar diameter-
G (3.1-4.0 cm), M (2.1-3.0 mm) and F (1.5-2.0 mm). The cuttings, 90 days after transplanting to tubes, were
taken as hardened and outplanted. The evaluations were in height (A), diameters (D) were measured at the
1st, 2nd, 3rd, 6th and 12th months. Leaf dry mass, wood, bark, branches and fine, average size and thick
roots were evaluated at the 6th month. Higher and thicker cutting presented higher initial growth, although
the differences showed decreasing values over time. Carlos Chagas showed the worst growth conditions.
