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Monthly and seasonal evaluation of dietary nutrients and their relationships with blood and milk parameters in lactating dairy cows

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Author(s): Nozad S.H. | Ramin A.G. | Moghadam G.H. | Asri-Rezaei S. | Kalantary Leila | Babapour Azadeh | Ramin S. | Phillips C.J.C.

Journal: Acta Veterinaria
ISSN 0567-8315

Volume: 63;
Issue: 2-3;
Start page: 255;
Date: 2013;
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Keywords: blood | cow | dietary | Holstein | milk parameters | monthly | seasonal

ABSTRACT
Monthly and seasonal variations among dietary, blood and milk parameters and their interrelationships were investigated during the lactation period in Holstein dairy cows in order to determine reliable dietary indices that could be useful in the studies related to milk yield improvement. Samples were prepared monthly, up to 11 months of lactation and were analyzed by the current laboratory methods using appropriate kits. Mean monthly and seasonal comparison of the dietary, blood and milk values were different among sampling times (p
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