Visualizar
Iniciar Como:
|
Datos del Documento
Utilice este identificador para citar o enlazar este documento:
https://ria.asturias.es/RIA/handle/123456789/7346
|
| Título: | Validation of the alkane technique to estimate diet selection of goats grazing heather-gorse vegetation communities |
| Autores: | Ferreira, Luis M.
Oliván, Mamen
García, Urce
Rodrigues, Miguel
Osoro, Koldo |
| Palabras Claves: | Arbustos
Cabras
Composición de la dieta
N-alcanos |
| Fecha Edición: | 2005 |
| Editor: | Wiley |
| Cita Bibliográfica: | Ferreira, L... [et al.]. Validation of the alkane technique to estimate diet selection of goats grazing heather-gorse vegetation communities. Journal of the Science of Food and Agriculture. 2005 ; 85: 1636-1646 |
| Resumen: | The effect of n-alkane faecal recovery on the accuracy of diet composition estimates, when
increasing the number of diet components, was studied. Seven dietary treatments, composed of different
proportions of herbaceous (Lolium perenne and Trifolium repens) and woody species (Erica umbellata,
Erica cinerea, Calluna vulgaris, Erica arborea and Ulex gallii) were offered to 28 goats housed in
metabolism crates. Diet composition was estimated from alkane concentrations in diet and faeces, with
and without correction for incomplete faecal recoveries, using least-squares procedures and was compared
with the known diet proportions. There were no significant differences between measured proportions
of dietary components and those estimated with alkanes when applying the faecal recovery corrections.
In contrast, the proportions calculated without faecal recovery correction differed significantly (p < 0.05)
from the actual proportions, overestimating feeds with higher content of long-chain n-alkanes. The diet
composition affected significantly the faecal recovery of alkanes if there were significant differences on
in vivo digestibility. The n-alkane faecal recoveries decreased as the diet digestibility increased. The
results obtained show that the application of the alkane methodology for grazing animals should be
preceded by calculation of the actual alkane faecal recoveries for each type of vegetation community and
experimental conditions. |
| URI: | https://ria.asturias.es/RIA/handle/123456789/7346 |
| ISSN: | 0022-5142 |
| Aparece en las Colecciones: | Open Access DRIVERset
Agroalimentación y Ganadería
|
Archivos en este documento:
Todos los documentos en RIA están protegidos por derechos de autor.
|
DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard -
Contacto