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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 27, No. 1, 2009, pp. 65-72
Bioline Code: zt09008
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 27, No. 1, 2009, pp. 65-72

 es Evaluación del perfil bromatológico y de algunos parámetros físicos del follaje de plantas leñosas consumidas por vacunos en silvopastoreo en un bosque seco tropical semideciduo
Nicolás Korbut; Álvaro Ojeda & Dorian Muñoz

Resumen

Con la finalidad de evaluar algunos parámetros físicos y químicos del follaje de seis especies de plantas leñosas de valor forrajero para vacunos ( Coccoloba check for this species in other resources sp., Guazuma ulmifolia check for this species in other resources , Inga check for this species in other resources sp., Machaerium check for this species in other resources sp., Samanea saman check for this species in other resources y Senna pallida check for this species in other resources ) presentes en un bosque seco tropical semideciduo ubicado en el estado Portuguesa, Venezuela, fueron colectadas muestras mensuales durante la época seca. Las muestras se correspondieron con la fracción comestible ingerida por 10 vacunos Bos taurus check for this species in other resources x Bos indicus check for this species in other resources (390,4 kg PV) en silvopastoreo. Para las especies en estudio (16,0% PC; 51,4% FND; 1,8% Ca y 0,1% P), se determinó que los valores de densidad volumétrica (0,26 g MS/mL), tamaño medio de partícula (0,31 mm), capacidad de retención de agua (3,2 mL/g MS), solubilidad de la materia orgánica (11,3%) y de la fracción mineral (53,9%) se encontraron dentro de los rangos citados en la literatura para materiales fibrosos, resaltando una importante variación entre especies (P<0,01) relacionada con el contenido y la composición química de la pared celular del follaje evaluado. Conjuntamente con otras estrategias de valoración químicas y biológicas, la sistematización de este tipo de información puede contribuir a establecer la relación entre la tasa de pasaje y de degradación de estos recursos, y consecuentemente, entre el consumo y la utilización de materiales fibrosos en sistemas de silvopastoreo con rumiantes.

Palabras-clave
Parámetros físicos, silvopastoreo, selva tropical, vacunos.

 
 en Evaluation of bromatological profile and some physical parameters of trees and shrubs foliage species consumed by cattle in silvopastoril conditions at a tropical semideciduous dry forest
Nicolás Korbut; Álvaro Ojeda & Dorian Muñoz

Abstract

In order to evaluate some chemical and physical parameters of foliage of six trees and shrubs with forage value for cattle ( Coccoloba check for this species in other resources sp., Guazuma ulmifolia check for this species in other resources , Inga check for this species in other resources sp., Machaerium check for this species in other resources sp., Samanea saman check for this species in other resources y Senna pallida check for this species in other resources ) located in a tropical semideciduous dry forest located in Portuguesa state, Venezuela were collected monthly samples during dry season. Samples corresponded to the edible fraction of plants consumed by 10 cattle Bos taurus check for this species in other resources x Bos indicus check for this species in other resources (390.4 kg LW) in silvopastoril conditions. For the species considered (16.0% CP, 51.4% NDF, 1.8% Ca, and 0.1% P), the particle density (0.26 g MS/mL), particle size (0.31 mm), water holding capacity (3.2 mL/g MS), organic matter (11.3%) and mineral (53.9%) solubilisation were within the literature range for fibrous material, with an important variation among species (P<0.01) related to the cellular wall contend and the chemical composition of foliage evaluated. Together with others strategies of chemical and biological valuation, the systematization of this information could contribute to establish the relationship between passage and degradation rates of these resources, and consequently, between intake and fibrous materials utilization in silvopastoril systems with ruminants.

Keywords
Physical parameters, silvopastoral, tropical forest, cattle.

 
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