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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 27, No. 3, 2009, pp. 221-232
Bioline Code: zt09025
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 27, No. 3, 2009, pp. 221-232

 en Fodder potential for goats of twenty woody species in Trujillo state, Venezuela
García, Danny E.; Medina, María G.; Moratinos, Pedro; Torres, Adolfo; Cova, Luis J.; Perdomo, Daniel & Santos, Oscar

Abstract

Using the main components (ACP) and automatic classification (ACA) analysis, the variations of the fodder potential of twenty species in Trujillo state, Venezuela, according to the propagation method (stake and botanical seed) were studied. The production of edible biomass, the relative acceptability by goats and the chemical composition were evaluated. Independently of the propagation form, a high variability for the first three components were detected (64.3-72.8%). The fibre neuter detergent, ash, and phenolic fraction showed the biggest fluctuations among the species. The edible biomass production, proteic and terpenoids levels and preferences showed low inter-specific variations. The species with better integral results were Morus alba check for this species in other resources , Chlorophora tinctoria check for this species in other resources , Cordia alba check for this species in other resources , Pentaclethra macroloba, Hibiscus rosa-sinensis check for this species in other resources , Wedelia aff. caracasana check for this species in other resources , Gliricidia sepium check for this species in other resources , and Guazuma ulmifolia check for this species in other resources . However, by the fodder potential index, Pithecellobium pedicellare check for this species in other resources and Bauhinia cumanensis check for this species in other resources were identified as promissory. Trichantera gigantea check for this species in other resources , Tithonia diversifolia check for this species in other resources , Capparis odoratissima check for this species in other resources , Moringa oleifera check for this species in other resources , and Leucaena leucocephala check for this species in other resources exhibited an intermediate potential. However, the biomass of Acacia spp., Azadirachta indica check for this species in other resources , Bulnesia arborea check for this species in other resources , Cassia alata check for this species in other resources , and Samanea saman check for this species in other resources presented little use feasibility as forage. The production of edible biomass and the acceptability constituted the most relevant variables to estimate the fodder potential. In the evaluated species the goat acceptability related with the fibre (P<0.05) and terpenoids (P<0.01) levels. No relationship among acceptability and phenolic compounds level were observed.

Keywords
forage, goats, biomass, acceptability, chemical composition

 
 es Potencial forrajero para cabras de veinte especies leñosas en el estado Trujillo, Venezuela
García, Danny E.; Medina, María G.; Moratinos, Pedro; Torres, Adolfo; Cova, Luis J.; Perdomo, Daniel & Santos, Oscar

Resumen

Mediante el análisis de componentes principales (ACP) y de clasificación automática, se estudiaron las variaciones del potencial forrajero de veinte especies en el estado Trujillo, Venezuela, en función del método de propagación (semilla botánica y estaca) y la época del año. Se evaluó la producción de biomasa comestible, la aceptabilidad relativa con cabras y la composición química. Independiente de la forma de propagación, el ACP detectó una alta variabilidad para los primeros tres componentes (64,3-72,8%). Las variables que presentaron las mayores fluctuaciones entre las especies fueron los contenidos de fibra detergente neutra, cenizas y fracción fenólica. La producción de biomasa comestible, el contenido proteico y de terpenos; así como la preferencia exhibieron menos variaciones inter-específicas. Los ramones con mejores resultados integrales fueron Morus alba check for this species in other resources , Chlorophora tinctoria check for this species in other resources , Cordia alba check for this species in other resources , Gliricidia sepium check for this species in other resources , Pentaclethra macroloba check for this species in other resources , Hibiscus rosa-sinensis check for this species in other resources , Wedelia aff. caracasana check for this species in other resources y Guazuma ulmifolia check for this species in other resources . No obstante, mediante el índice de potencial forrajero, también se identificaron como promisorias a Pithecellobium pedicellare check for this species in other resources y Bauhinia cumanensis check for this species in other resources . Trichantera gigantea check for this species in other resources , Tithonia diversifolia check for this species in other resources , Capparis odoratissima check for this species in other resources , Moringa oleifera check for this species in other resources , Leucaena leucocephala check for this species in other resources exhibieron un potencial intermedio. Sin embargo, la biomasa de Acacia spp., Azadirachta indica check for this species in other resources , Bulnesia arborea check for this species in other resources , Cassia alata check for this species in other resources y Samanea saman check for this species in other resources presentaron poca factibilidad de uso como forraje. La producción de material comestible y la aceptabilidad constituyeron las variables de mayor relevancia para la estimación del potencial forrajero integral. En las especies evaluadas la aceptabilidad de las cabras se encontró relacionada negativamente con los niveles de fibra (P<0,05) y terpenoides (P<0,01), y no con los compuestos fenólicos.

Palabras-clave
forraje, cabras, biomasa, aceptabilidad, composición química

 
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