Seed seedlings development of different Eucalyptus and Corymbia species purposing forestry advancements in the Cerrado

Abstract

The production of quality seedlings has a direct impact on the productivity of a forestry establishment. Knowing the specifics of each specie and its adaptation to the edaphoclimatic conditions of a given region is essential for the success of a forest plantation. The production of seedlings of Eucalyptus spp. and Corymbia spp. presented in this work comes from the sexual propagation, by seeds. The study carried out the comparison between 13 species of Eucalyptus spp. and Corymbia spp., verifying the quality of the seed lots, via in vitro germination test and by sowing in tubes. The biometric measurements applied in this study were total seedling height, neck diameter and seedling vigor, three measurements of seedlings were carried out in plastic bags and the data were transferred to the R software to be analyzed, applying split-plot analysis of variance (ANOVA) and means of variables. The germination percentage was higher in tubes than the results obtained in vitro, with emphasis on the results of the species Eucalyptus dunnii, Corymbia citriodora, Eucalyptus longirostrata and Corymbia maculata, which reached 100% germination in tubes and these are also the species that stood out in biometric measurements, with emphasis on the results of the species Eucalyptus dunnii, Corymbia citriodora and Eucalyptus longirostrata. The study aimed to generate viable, healthy and vigorous seedlings from seminal propagules of Eucalyptus spp. and Corymbia spp., to compose, at the end of the experiment, which has the potential to extend, beyond this study, the Eucalyptus Garden at Escola de Agronomia - EA/UFG), Goiânia, GO, Brazil, collaborating with the practical classes that will be able to use the space to present to the students the features inherent to the species.