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Comportamiento de 23 accesiones de Leucaena spp. en condiciones de vivero


 
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 ISSN 0864-0394

WENCOMO, Hilda B    ORTIZ, R. Comportamiento de 23 accesiones de Leucaena spp. en condiciones de vivero. []. , 33, 2, pp. 1-1. ISSN 0864-0394.

^les^aCon el objetivo de caracterizar las accesiones de mejor comportamiento en condiciones de vivero, se evaluó una colección de Leucaena spp., representada por 23 accesiones de cinco especies. Para ello se midió: la altura de la plántula, el grosor del tallo y el número de ramas, la biomasa seca de la parte aérea, la longitud y la masa seca de la raíz, los cuales sirvieron como indicadores del momento óptimo de trasplante; estas se sembraron en bolsas de polietileno negro, de 26 x 14 cm. Se observó que estos caracteres tuvieron marcada influencia en el desarrollo de la planta y, al aplicar un análisis de componentes principales, mostraron una gran variabilidad (63,10%) en la primera componente. Se encontró relación entre la altura de la planta, el número de brotes foliares, la biomasa seca de la parte aérea, la masa seca de la raíz y la longitud de la raíz, y para estos caracteres se destacaron las accesiones L. leucocephala cv. Cunningham, cv. Perú, CIAT-9119, CIAT-9438, CIAT-751, CIAT-7988, CIAT-7384, CIAT-7929, CIAT-17480, cv. Ipil-Ipil, cv. CNIA-250, L. lanceolata CIAT-17255, CIAT-17501 y L. diversifolia CIAT-17270. Se concluye que existió variabilidad en la colección dentro de las especies y dentro de las accesiones de cada especie, y que es necesario tomar en consideración los caracteres estudiados para definir el momento óptimo de trasplante.^len^aWith the objective of characterizing the best-performance accessions under nursery conditions, a Leucaena spp. collection, represented by 23 accessions of five species, was evaluated. For that purpose the following elements were measured: seedling height, stem diameter and branch number, dry biomass of the aerial part, root length and dry matter, which served as indicators of the optimum transplantation moment; the seedlings were planted in 26 x 14 cm black polyethylene bags. These features were observed to have remarkable influence on plant development and when a main component analysis was applied, they showed high variability (63,10%) in the first component. Relation was found among plant height, number of leaf growths, dry biomass of the aerial part, dry root mass and root length, and for these features the following accessions stood out: L. leucocephala cv. Cunningham, cv. Peru, CIAT-9119, CIAT-9438, CIAT-751, CIAT-7988, CIAT-7384, CIAT-7929, CIAT-17480, cv. Ipil-pil, cv. CNIA-250; L. lanceolata CIAT-17255, CIAT-17501 and L. diversifolia CIAT-17270. It is concluded that there was variability in the collection among the species and among the accessions of each species, and that it is necessary to take into consideration the studied characteristics to define the optimum transplantation moment.

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