Performance of dairy ewes fed diets with a fibrolytic enzyme product included in the concentrate during the suckling period
Flores, C. (Universidad Autónoma de Tlaxcala (Mèxic). Departamento Agrobiología)
Caja López, Gerardo (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Casals Costa, Ramon (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Albanell Trullas, Elena (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Such i Martí, Francesc Xavier (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Data:	2008
Resum:	Seventy-two multiparous ewes from two dairy breeds (Manchega, n = 36 and Lacaune, n = 36) were used in a replicated 2 x 2 factorial design to evaluate the effects of diet supplementation with an exogenous fibrolytic enzyme product on lactation performance and feed intake during the suckling period (weeks 1 to 4) according to breed. Ewes were blocked in groups of nine and fed ad libitum after lambing a diet based on 70% forage and 30% concentrate to which the enzyme was added after pelleting. Experimental concentrates were: control (without enzyme) and enzyme (fibrolytic enzyme complex, included at 0. 47% volume to weight of concentrate). Twenty-four dry and open ewes (Manchega, n = 12 and Lacaune, n = 12) were also grouped by breed and used to measure the fill value of the ration used. During the suckling period, milk yield, milk composition, dry matter intake, lamb growth, as well as body weight change and body condition score change were not affected by enzyme supplementation. Breed effect was significant for milk yield, the Manchega ewes yielding less milk with a higher content of milk components than the Lacaune ewes. The opposite was observed for dry matter intake. Enzyme supplementation reduced intake by 9% in the dry ewes, resulting in a greater fill value of the diet. In conclusion, no lactational effects were detected when the fibrolytic enzyme product was added to the concentrate fed to dairy ewes.
Ajuts:	Ministerio de Educación y Ciencia CICYT AGL2001-2617
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Animal, Vol. 2 Núm. 6 (june 2008) , p. 962-968, ISSN 1751-732X

DOI: 10.1017/S1751731108001961
PMID: 22443676

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