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Analysis of environmental effects on test day milk yields of Sarda dairy ewes

Macciotta, Nicolò Pietro Paolo and Cappio Borlino, Aldo and Pulina, Giuseppe (1999) Analysis of environmental effects on test day milk yields of Sarda dairy ewes. Journal of Dairy Science, Vol. 82 (10), p. 2212-2217. eISSN 1525-3198. Article.

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Temporal evolution of Sarda ewes milk production was analyzed with mixed linear models and factor analysis to investigate environmental effects on the shape of lactation curves and on milk yields during different lactation stages. Parity, year of production, level of altitude, and flock within altitude affected milk yield, whereas the effect of type of lambing was not significant. Lactation curves pertaining to the three altitudes were clearly different. Factor analysis suggested an independence among yields recorded during different phases of lactation and a specific behavior of (co)variances structure among test day yields obtained in mountains compared with hills and plains.

Item Type:Article
ID Code:1041
Uncontrolled Keywords:Sheep lactation curves, test day, factor analysis
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/17 Zootecnica generale e miglioramento genetico
Area 07 - Scienze agrarie e veterinarie > AGR/19 Zootecnica speciale
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze zootecniche
Publisher:American Dairy Science Association
Deposited On:18 Aug 2009 10:04

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