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Caracterizacion De Maices Venezolanos En Reiacion A Area Foliar Y Extincion De Luz

Author

Listed:
  • Garrido, O.
  • Camacho, R. G.

Abstract

Se hace la caracterizacion de nueve materiales genéticos de mafz (Arichuna, Baraure, Braquftico, Experimental-2, Foremafz PB. FM-6, Ofaregon, Proseca -71 y Tamanaco), en relaciôn con ârea promedio de hoja por planta, ârea foliar total por planta, indice de area folia"-, numéro promedio de hojas por planta, altura de la planta, altura de insercion de la primera mazorca y coeficiente de extincion de luz (K) a 0,50 m, 1,00 m, 1,50 m, 2,00 m.y 2,50 m. de altura de la planta. Ademâs.estudios de correlacion y regresion simple entre altura de planta y altura de insercion de la primera mazorca, largo-ancho de hojas para cada material genético bajo estudio, y en forma global para rendimiento con altura de planta y rendimiento y ârea foliar. Se encon'craron rangos de variacion para las diverses variables asi: ο Area promedio de hoja por planta: 471,23 cm (Foremaiz PB) y 606,48 ο cm (Baraure). Area foliar total por planta: 5327,50 cm2 (Foremafz PB) y 8411,09 cm2 (Braquftico). Indice de ârea foliar: 4,26 (Foremafz PB) y 6,67 (Braquftico). Altura de planta: 1,80 m (8raquftico) y 2,78 m (Obregon) Altura de la primera mazorca: 0,94 m (Braquftico) y 1,71 m (Baraure). Numero promedio de hoja/planta: 10,875 (Experimental-2) y 13,875 (Braquftico). Coeficiente de extinciôn de luz (K): 0,23 (Braquftico) y 0,42 (Arichuna). Rendimiento: 2877 Kg/ha. (Braquftico) y 4784 Kg/ha (Tamanaco). Se obtuvieron valores de correlacion.altamente significativos entre altura de planta y altura de primera mazorca con rangos entre 0,78 y 0,86 y modelos de regresion muy similares. La correlacion entré largo y ancho de la hoja prod^ ce valores de r mas bajos (0,35 a 0,65) y una gran variabi1 idad entre los materiales genéticos estudiados. El rendimiento esta mejor correlacionado con altura de planta (r=0,84) que con IAF (r=0,84) que con IAF (r=0,07), la asociacion entre ârea promedio por hoja y numéro de hoja por planta no es muy estrecha (r=0,41).

Suggested Citation

  • Garrido, O. & Camacho, R. G., 1981. "Caracterizacion De Maices Venezolanos En Reiacion A Area Foliar Y Extincion De Luz," 17th Annual Meeting, November 1-5, 1981, Caracas, Venezuela 263016, Caribbean Food Crops Society.
  • Handle: RePEc:ags:cfcs17:263016
    DOI: 10.22004/ag.econ.263016
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    Keywords

    Agricultural and Food Policy;

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