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4 results on '"Rada, F."'

2. Ecophysiological performance of Brachiaria decumbens in monocrop and in association with Leucaena leucocephala.

Author

Rodríguez-Petit, A., Rada, F., and Colmenares, M.

Subjects
*ECOPHYSIOLOGY, *BRACHIARIA decumbens, *PLANT growth, *LEAD tree, *PHOTOSYNTHESIS, *LEAF area index
Abstract

In order to study the ecophysiological relations that affect the growth of B. decumbens in monocrop (MO) and associated with L. leucocephala (AS), evaluations of photosynthetic active radiation (PAR), assimilation (A) stomatic conductance (Gs), transpiration (E), relative humidity (RH), water potential (Øh), differential of steam pressure (DSP) and leaf area index (LAI) were made in a tropical humid forest zone. The evaluations were made 5, 10 and 22 days after grazing under both conditions (MO and AS). The most positive values of Øh (P<0,05) were found in AS, as well as the lowest values of PAR (P<0,05) in all the evaluated dates. RH and DSP did not show differences (P 0,05). The gas exchange parameters (E, Gs and A) showed significantly higher values in MO (P<0,05) in all dates. LAI was higher in MO after 10 and 22 days of evaluation. Due to the limitation of the photosynthetic capacity exerted by the light decrease on the grass, that PAR is concluded to be the most important factor that determine growth and development of B. decumbens in AS. [ABSTRACT FROM AUTHOR]

Published
2008

3. Comportamiento ecofisiológico de Brachiaria decumbens en monocultivo y en asociación con Leucaena leucocephala.

Author

Rodríguez-Petit, A., Rada, F., and Colmenares, M.

Subjects
*ECOPHYSIOLOGY, *PLANT growth, *BRACHIARIA decumbens, *PHOTOSYNTHESIS, *PLANT transpiration, *GAS exchange in plants
Abstract

In order to study the ecophysiological relations that affect the growth of B. decumbens in monocrop (MO) and associated withZ. leucocephala (AS), evaluations of photosynthetic active radiation (PAR), assimilation (A) stomatic conductance (Gs), transpiration (E), relative humidity (RH), water potential (0h), differential of steam pressure (DSP) and leaf area index (LAI) were made in a tropical humid forest zone. The evaluations were made 5,10 and 22 days after grazing under both conditions (MO and AS). The most positive values of 0h (P<0,05) were found in AS, as well as the lowest values of PAR (P<0,05) in all the evaluated dates. RH and DSP did not show differences (P 0,05). The gas exchange parameters (E, Gs and A) showed significantly higher values in MO (P<0,05) in all dates. LAI was higher in MO after 10 and 22 days of evaluation. Due to the limitation of the photosynthetic capacity exerted by the light decrease on the grass, that PAR is concluded to be the most important factor that determine growth and development of B. decumbens in AS. [ABSTRACT FROM AUTHOR]

Published
2008

4. Comportamiento ecofisiológico de Brachiaria decumbens en monocultivo y en asociación con Leucaena leucocephala Ecophysiological performance of Brachiaria decumbens in monocrop and in association with Leucaena leucocephala

Author

Angel Rodriguez-Petit, Rada, F., and Colmenares, M.

Subjects
B. decumbens, Brachiaria decumbens, Silvopastoral systems, sistemas silvopascícolas, gas exchange, lcsh:Animal culture, intercambio de gases, lcsh:Agriculture (General), lcsh:S1-972, lcsh:SF1-1100
Abstract

Con el objeto de estudiar las relaciones ecofisiológicas que determinan el crecimiento de B. decumbens en monocultivo (MO) y asociada a L. leucocephala (AS), se realizaron evaluaciones de radiación fotosintéticamente activa (RFA), asimilación (A), conductancia estomática (Gs), transpiración (E), humedad relativa (HR), po­tencial hídrico de la hoja (Øh), diferencial de presión vapor (DPV) e índice de área foliar (IAF) en ambas condiciones (AS y MO), en una zona de bosque húmedo tropical; estas evaluaciones se hicieron a los 5, 10 y 22 días después del pastoreo en ambas condiciones. Los valores más positivos de Øh se encontraron en AS, al igual que los valores más bajos de RFA, con diferencias significativas (PIn order to study the ecophysiological relations that affect the growth of B. decumbens in monocrop (MO) and associated with L. leucocephala (AS), evaluations of photosynthetic active radiation (PAR), assimilation (A) stomatic conductance (Gs), transpiration (E), relative humidity (RH), water potential (Øh), differential of steam pressure (DSP) and leaf area index (LAI) were made in a tropical humid forest zone. The evaluations were made 5, 10 and 22 days after grazing under both conditions (MO and AS). The most positive values of Øh (P

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