Resumo

VARGAS-SIMON, Georgina; PIRE, Reinaldo  e  DZUL, Martha Lázaro. Seedling growth in greenhouse conditions of the forest species Dialium guianense (Aubl.) Sandwith. Colomb. for. [online]. 2018, vol.21, n.1, pp.58-68. ISSN 0120-0739.  https://doi.org/10.14483/2256201x.11491.

Dialium guianense is used for its wood and fruit production, and is a tropical tree species native to evergreen forests. Given the threat these forests face, the purpose of this work was to evaluate the initial growth of the plant under greenhouse conditions, for aiming in the development of propagation programs. Seedlings of the species were transplanted to nursery bags under a completely randomized design and grown for 10 months with an initial population of 200 plants. At the end of the experiment, the shoot and root reached lengths of 32.8 and 28.9 cm, respectively. The average number of composite leaves was 12.3 each with seven leaflets. The average biomass was 2.5 g for the shoot, 1.6 g for roots, and 3.7 g for leaves, with a shoot/root around four. The average relative growth rate (RGR) was 15 mg g -1 day -1. These characteristics indicate that D. guianense is a late successional species.

Palavras-chave : biomass; plant propagation; relative growth rate; shoot/root ratio.

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