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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 26, No. 3, 2008, pp. 257-259
Bioline Code: zt08041
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 26, No. 3, 2008, pp. 257-259

 en In Situ Degradability of Grassland Forages Species in the Silvopastoral System With Salicaceas
Rossi, Carlos A.; González, Gabriela L.; De Magistris, Alberto A.; Pereyra, Ana M. & Torrá, Enrique

Abstract

The objective of this research was to evaluate in situ degradability of main forage species in the native grassland in a silvopastoral system with salicaceas in the region of the lower Paraná river Delta. For the in situ evaluation, there were used five steers with water-pipe ruminal. The samples were incubated for 24 and 48 h. At 24 h. Alternanthera philoxeroides check for this species in other resources turned out to be the species of more degradability (78.5%). Lolium multiflorum check for this species in other resources (54.7%) was in second place, and Phalaris angusta check for this species in other resources (43.1%) and Echinochloa helodes check for this species in other resources (43.0%) were located in the third order. The rest of the species showed values below 40%, with Carex riparia (24.8%), Paspalum urvillei (21.4%), and Panicum pernambucense check for this species in other resources (19.7%) without significant differences among them. At 48 h, A. philoxeroides resulted first with 80.7%, followed by P. angusta (63.0%) and L. multiflorum (62.5%). E. helodes (52.4%) was in third place. The fourth group was composed by Paspalidium paludivagum check for this species in other resources (45.1%) and Glyceria multiflora check for this species in other resources (44.1%). According to the obtained results, we can conclude that A. philoxeroides was the species of higher in situ degradability of all studied species. Finally, L. multiflorum, P. angusta, and E. helodes were species with interesting values.

Keywords
calf operation, wetland, Paraná Delta river, poplar.

 
 es Degradabilidad In Situ de Forrajeras Del Pastizal Natural en un Sistema Silvopastoril Con Salicáceas
Rossi, Carlos A.; González, Gabriela L.; De Magistris, Alberto A.; Pereyra, Ana M. & Torrá, Enrique

Resumen

El objetivo de este trabajo fue evaluar la degradabilidad in situ de las principales especies forrajeras del pastizal nativo en un sistema silvopastoril con salicáceas en la región del Bajo Delta del río Paraná. Se utilizaron para la evaluación cinco novillos con fístula ruminal y se incubaron las muestras a 24 y 48 h. Para 24 h, Alternanthera philoxeroides check for this species in other resources resultó ser la especie de mayor degradabilidad con 78,5%. Lolium multiflorum check for this species in other resources (54,7%) se ubicó en segundo lugar y Phalaris angusta check for this species in other resources (43,1%) y Echinochloa helodes check for this species in other resources (43,0%) se ubican juntas en el tercer orden. El resto de las especies muestran valores inferiores a 40%, ubicándose en el último grupo Carex riparia (24,8%), Paspalum urvillei (21,4%) y Panicum pernambucense check for this species in other resources (19,7%), sin diferencias significativas entre ellas. Para 48 h, A. philoxeroides con 80,7% resultó la de mayor valor, luego se ubicaron P. angusta (63,0%) y L. multiflorum (62,5%). Por su parte, E. helodes resultó en tercer orden con 52,4%. El cuarto grupo lo integraron Paspalidium paludivagum check for this species in other resources (45,1%) y Glyceria multiflora check for this species in other resources (44,1%). Podemos concluir que A. philoxeroides resultó ser la especie de mayor degradabilidad in situ de todas las especies analizadas, con porcentajes sumamente elevados para ambos lapsos. Las especies L. multiflorum, P. angusta y E. helodes merecen ser destacadas ya que resultaron con los valores muy interesantes.

Palabras-clave
cría vacuna, humedal, Delta del Paraná, álamo.

 
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