Resumen

MEDINA¹, María G; GARCIA¹, D. E; MORATINOS², P  y  COVA¹, L. J. Comparison of three tree legumes planted on an alkaline substratum during the nursery stage. II. Growth and biomass distribution pattern. Pastos y Forrajes [online]. 2011, vol.34, n.2, pp.167-178. ISSN 0864-0394.

A trial was conducted in the Trujillo state, Venezuela, in order to compare the growth and biomass distribution pattern of Albizia lebbeck, Leucaena leucocephala (Trujillo ecotype) and Erythrina fusca for 18 weeks in nursery. The studied variables were: growth rate related to height (GRH) and DM distribution (GRDM), as well as dry matter percentage (DM) and dry weight per plant of the fractions (leaves, stem, root). A completely randomized design for measurements repeated in time and ten replications per species were used. E. fusca showed the highest average GRH and GRDM (3,7 mm/day and 94,8 mg/day), followed by L. leucocephala (3,1 and 81,3) and, lastly, A. lebbeck (1,2 mm/day and 53,1 mg/day), respectively. In dependently from the species, the highest percentage of average DM was observed in the roots (31,9), followed by the stem (28,0) and leaves (25, 4). A higher DM distribution per plant was observed in the leaves (3,9 g) and root (3,1 g) as compared to the stem (2,9 g). It is concluded that, for these nursery conditions, E. fusca showed the best results; while A. lebbeck would need more time to reach the desirable characteristics for its transplant to the field.

Palabras clave : Biomass; growth; legumes; nurseries.

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