Listar Unidades de Investigación de la Facultad de Ciencias por autor "Rada R., Fermin J."
Mostrando ítems 21-40 de 73
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Efecto del nitrógeno en los parámetros fotosintéticos y de producción del cultivo de la gerbera (Gerberajamesonii H. Bolus ex Hook. f.).
Corrales Gonzalez, Maykoll; Rada R., Fermin J.; Jaimez, Ramón (ActaAgronomica doi: http://dx.doi.org/10.15446/acag.v65n3.49555, Colombia, 2017-02-20)Actualmente, existe un interés por comprender los aspectos fisiológicos involucrados en la obtención de altas producciones en diferentes cultivos y su relación con la disponibilidad de nutrientes en el sustrato. Este ... -
Estudio del crecimiento de Polylepis sericea Weed. en el páramo venezolano
Colmenares Arteaga, Maribel del Carmen (Venezuela, 2002-07-03) -
Estudio morfoanatómico de dos orquídeas de una selva nublada tropical
Ely Bali, Francisca; Torres, Fresia; Rada R., Fermin J.; León Vargas, Yelitza (Interciencia 32: 410-418, Venezuela, 2007-05)Se describen por primera vez la estructura morfo-anatómica y estrategias hídricas de dos orquídeas de las selvas nubladas andinas de Venezuela, Maxillaria miniata y Pleurothallis cardiantha. El estudio se efectuó en una ... -
Estudios ecofisiológicos del ají dulce (C. chinense Jacq) bajo diferentes condiciones de temperatura y radiación
Jaimez, Ramón (2012-06-27)En los trópicos, el manejo de cultivos asociados que permita dar variaciones en las condiciones de luz sobre uno de ellos y la si embra y manejo de una especie en varias altitudes son ... -
La evolución de la investigación ecológica en los páramos de Venezuela: múltiples visiones de un ecosistema único
Llambí, Luis Daniel; Sarmiento, Lina; Rada R., Fermin J. (Medina, E., Huber, O., Nassar, J., Navarro, P. Recorriendo el paisaje vegetal en Venezuela. Ediciones IVIC, Instituto Venezolano de Investigaciones Científicas. Caracas, Venezuela. pp 173-209, Venezuela, 2013)La investigación ecológica en los páramos venezolanos tiene más de 40 años de desarrollo. A partir de los trabajos pioneros durante los años setenta, se han venido consolidando una serie de líneas de investigación que han ... -
Flowering and fruit production dynamics of sweet pepper (Capsicum chinense Jacq) under different shade conditions in a humid tropical region
Jaimez, Ramón; Rada R., Fermin J. (2006)Growing sweet pepper (C. chinense) under shade has increased in the region south of Lake Maracaibo in Venezuela. We studied the effects of different shade conditions on the dynamics of flowering and fruit production of C. ... -
Freezing avoidance in Andean giant rosette plants
Rada R., Fermin J.; Goldstein, Guillermo; Azócar, Aura; Meinzer, Frederick (1985) -
Freezing avoidance in tropical Andean bamboos
Ely Bali, Francisca; Kiyota, Sayuri; Rada R., Fermin J. (The Journal of the American Bamboo Society 27:1-10., 2014)Frost resistance was compared in five species of different life forms in the neotropical woody bamboo genus Chusquea growing along a cloud forest-paramo gradient, between 2250-4010 m a.s.l. in the Venezuelan Andes. C. ... -
Freezing avoidance in tropical Andean bamboos
Ely Bali, Francisca; Kiyota, Sayuri; Rada R., Fermin J. (LXth World bamboo Congress proceedings. Sección 2, Massachusetts, USA. pp. 247-257, Estados Unidos, 2012-04-15)Frost resistance was compared in five species of different life forms in the neotropical woody bamboo genus Chusquea growing along a cloud forest-paramo gradient, between 2250-4010 m a.s.l. in the Venezuelan Andes. C. ... -
Freezing tolerance and avoidance in tropical Andean plants: Is it equally represented in species with different plant height?
Squeo, F. A.; Rada R., Fermin J.; Azócar, Aura; Goldstein, Guillermo (1991) -
Freezing tolerance in Draba chionophilla, a miniature caulescent rosette species
Azócar, Aura; Rada R., Fermin J.; Goldstein, Guillermo (1988) -
Freezing tolerance in grasses along an altitudinal gradient in the Venezuelan Andes
Márquez, Edjuly J.; Rada R., Fermin J.; Fariñas G, Mario R. (SABER ULA, 2006-12-07)Freezing tolerance in grasses along an altitudinal gradient in the Venezuelan Andes (Márquez, Edjuly J., Rada, Fermín y Fariñas, Mario) Abstract The tropical high Andes experience greater daily temperature oscillations ... -
Functional characterisitcs of the arborescent genus Polylepis along a latitudinal gradient in the high Andes
Azócar, Aura; Rada R., Fermin J.; García Nuñez, Carlos (Interciencia 32(10): 663-668, Venezuela, 2007-09)Polylepis is a genus restricted to the Andean Mountain Range, naturally occurring above the upper continuous forest limit. The purpose of this work was to integrate and compare functional characteristics in terms of water ... -
Functional Diversity in Tropical High Elevation Giant Rosettes
Rada R., Fermin J. (Goldstein G, Santiago LS (Eds). Tropical Tree Physiology. Springer., Suiza, 2016-03-04)Strong daily temperature variations, seasonal soil water availability and high air evaporative demands play an essential role in adaptive responses of tropical high elevation mountain plants. Giant rosettes are a perfect ... -
Gas exchange and low temperature resistance in two tropical high mountain tree species from the Venezuelan Andes
Cavieres, L.; Rada R., Fermin J.; Azócar, Aura; García Nuñez, Carlos; Cabrera, Maira (2000) -
Gas exchange and water relations of evergreen and deciduous tropical savanna trees
Goldstein, Guillermo; Rada R., Fermin J.; Rundel, P.; Azócar, Aura; Orozco, Angélica (Annales des Sciences Forestieres 46 (supp), 1989) -
Gas exchange in sweet pepper (Capsicum chinense Jacq) under different light conditions
Jaimez, Ramón; Rada R., Fermin J. (Journal of Agricultural Science, 3 (3):134-142, Venezuela, 2011-09)Plants in the tropics are exposed to high radiation and consequently high temperature and evaporative demands throughout the year. Under these conditions, physiological processes and final yield may negatively affect ... -
Gas exchange, growth, flowering and furit production in sweet pepper (Capsicum chinenseJacq) along a thermal gradient determined by altitudinal differences in a tropical region
Jaimez, Ramón; Rada R., Fermin J. (Experimental Agriculture 15: doi:10.1017/S0014479715000071., Inglaterra, 2016-04)A common practice in some South American countries consists in moving around Capsicum chinense cultivars between regions where edaphoclimatic conditions differ notably. The purpose of this research was to compare and relate ... -
How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
Rada R., Fermin J.; Briceño, Benito E.; Azócar, Aura (Revista Chilena de Historia Natural 81: 335-343, Chile, 2008)Temperature determines plant formations and species distribution along altitudinal gradients. Plants in the tropical high Andes, through different physiological and morphological characteristics, respond to freezing night ...