Effect of live weight pre- and post-lambing on milk production of East Friesian sheep

Autor: Juan C. Ángeles Hernández, Sergio Radic Schilling, Marcela A. Vera Arias, Ricardo A. Echeverría Pérez, Octavio Alonso Castelán-Ortega, Aurora H. Ramírez Pérez, Manuel González Ronquillo
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Italian Journal of Animal Science, Vol 17, Iss 1, Pp 184-194 (2018)
Druh dokumentu: article
ISSN: 1828-051X
1828051X
DOI: 10.1080/1828051X.2017.1349536
Popis: The study was conducted to analyse the effect of sheep body weight (BW) at mating, mid-pregnancy, lambing, early lactation, mid-lactation and late lactation on milk yield and patterns of milk production. Also, the effects of environmental factors such as number of lambing (NL) and type of lambing (TL) on BW and milk production were analysed. A total of 52 multiparous East Friesian ewes from an experimental flock were used. Ewes were assigned to three different groups according to their BW at each productive stage: low (LBW), moderate (MBW) and high BW (HBW). Lactations were fitted using the mechanistic model described by Pollott. Total milk yield (TMY), peak yield (PY) and time at peak yield (TPY) were also calculated. HBW ewes had consistently higher TMY (p
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