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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 24, No. 3, 2006, pp. 233-250
Bioline Code: zt06020
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 24, No. 3, 2006, pp. 233-250

 es Composición química, metabolitos secundarios, valor nutritivo y aceptabilidad relativa de diez árboles forrajeros
Danny E. García y Maria G. Medina

Resumen

Con el objetivo de determinar la composición química, los niveles de metabolitos secundarios, el valor nutritivo y la aceptabilidad del follaje de diez leguminosas forrajeras ( Albizia caribaea check for this species in other resources , Albizia lebbeck check for this species in other resources , Cassia fistula check for this species in other resources , Cassia grandis check for this species in other resources , Pithecellobium dulce check for this species in other resources , Pithecellobium saman check for this species in other resources , Gliricidia sepium check for this species in other resources , Leucaena macrophylla check for this species in other resources , Lysiloma latisiliquum check for this species in other resources y Enterolobium contortisilicum check for this species in other resources ) se llevó a cabo una investigación con un diseño totalmente aleatorizado con cinco réplicas en el estado Trujillo, Venezuela. La composición bromatológica presentó variaciones sustanciales entre las especies (P<0,05). C. grandis (5,61%) y L. latisiliquum (5,70%) mostraron los niveles más sobresalientes de polifenoles totales, L. latisiliquum presentó concentraciones importantes de taninos totales, taninos condensados y taninos hidrolizables (5,32; 5,25 y 0,65%, respectivamente); mientras que C. grandis se destacó por contener el mayor nivel de taninos que precipitan las proteínas (3,64%). A. caribaea (3,50%) y P. saman (3,85%) exhibieron cantidades considerables de saponinas y A. lebbeck niveles significativos de alcaloides (0,51%). Los mayores potenciales de degradación de la MS correspondieron con A. lebbeck (84,1%) y G. sepium (84,0%). La proteína de G. sepium se degradó más rápidamente; mientras que P. dulce exhibió la degradación postruminal del nitrógeno más elevada (66,7%). Las especies con mayores concentraciones de metabolitos polifenólicos y saponinas fueron menos ramoneadas por los ovinos. Los follajes de todas las leguminosas estudiadas presentan aceptable calidad nutritiva. Sin embargo, de forma integralmente, A. lebbeck, P. dulce, G. sepium y E. contortisilicum muestran las mejores potencialidades como alimento suplementario para los rumiantes.

Palabras-clave
Phytochemistry, toxics, legumes, fodder species.

 
 en Chemical composition, secondary metabolites, nutritive value and relative acceptability of ten fodder trees
Danny E. García y Maria G. Medina

Abstract

In order to determinate the chemical composition, secondary metabolites level, nutritive value and acceptability of ten fodder legumes ( Albizia caribaea check for this species in other resources , Albizia lebbeck check for this species in other resources , Cassia fistula check for this species in other resources , Cassia grandis check for this species in other resources , Pithecellobium dulce check for this species in other resources , Pithecellobium saman check for this species in other resources , Gliricidia sepium check for this species in other resources , Leucaena macrophylla check for this species in other resources , Lysiloma latisiliquum check for this species in other resources y Enterolobium contortisilicum check for this species in other resources ), an experiment was carried out using a total randomize arrangement with five replications in Trujillo state, Venezuela. Significant difference were observed regarding bromatological composition (P<0,05). C. grandis (5,61%) and L. latisiliquum (5,70%) showed the highest total polyphenols level, L. latisiliquum important concentrations of total tannins, condensed tannins and hydrolysable tannins (5,32; 5,25 y 0,65%, respectively) and C. grandis the biggest level of precipitant protein tannins (3,64%). A. caribaea (3,50%) and P. saman (3,85%) showed considerable quantities of saponins and A. lebbeck superior alkaloids level (0,51%). The highest DM degradation corresponded to A. lebbeck (84,1%) and G. sepium (84,0%). G. sepium showed high protein degradation rate; while P. dulce presented important postruminal nitrogen degradation (66,7%). Species with biggest concentration of polyphenolic compounds and saponins were moderately our not browsed for sheep. The foliages of all studied legumes showed acceptable nutritive quality. However, in general, A. lebbeck, P. dulce, G. sepium y E. contortisilicum showed the best potentiality as supplementary feeding for ruminant.

Keywords
fitoquímica, tóxicos, leguminosas, especies forrajeras.

 
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