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

Nozad, S. H., Ramin, A. G., Moghadam, G. H., Asri-Rezaei, S., Leila, Kalantary, Azadeh, Babapour, Ramin, S. and Phillips, C. J. C. (2013) Monthly and seasonal evaluation of dietary nutrients and their relationships with blood and milk parameters in lactating dairy cows. Acta Veterinaria (Beograd), 63 2-3: 255-268. doi:10.2298/AVB1303255N


Author Nozad, S. H.
Ramin, A. G.
Moghadam, G. H.
Asri-Rezaei, S.
Leila, Kalantary
Azadeh, Babapour
Ramin, S.
Phillips, C. J. C.
Title Monthly and seasonal evaluation of dietary nutrients and their relationships with blood and milk parameters in lactating dairy cows
Journal name Acta Veterinaria (Beograd)   Check publisher's open access policy
ISSN 0567-8315
Publication date 2013
Sub-type Article (original research)
DOI 10.2298/AVB1303255N
Open Access Status DOI
Volume 63
Issue 2-3
Start page 255
End page 268
Total pages 14
Place of publication Serbia
Publisher Fakultet Veterinarske Medicine, Univerzitet u Beogradu
Collection year 2014
Language eng
Formatted 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<0.05). The overall mean for dietary energy (ME), crude fiber (CF), moisture, ash, phosphorus (DP), calcium (DCa), ether extract (EE) and crude protein (CP) were 1.38 Mcal/KgDM, 20.4%, 42.8%, 5.5%, 0.34%, 0.76%, 2.39% and 10.2%, respectively. Correlations were found between dietary DP/Ca (r=-0.73), DP/EE (r=0.67), DP/ash (r=0.79), DP/moisture (r=0.84), DP/ME (r=0.60), Ca/ash (r=0.95), Ca/moisture (r=-0.64), and DCa/moisture (r=-0.93). Correlations among dietary, blood, and milk parameters revealed different relationships with the most important correlations between DP and blood parameters, and CP with blood and milk parameters. Among blood parameters glucose, BHB, SK, AST, GGT, neutrophils and lymphocytes. Milk parameters: Mg, Ca, and lactose showed the strongest relationships with dietary parameters. In conclusion, the dietary, blood and milk values were different during the lactation months and seasons. Dietary CP, Ca and DP could be applied as relevant indices in studies related to milk production improvement in dairy herds.
Keyword Blood
Cow
Dietary
Holstein
Milk parameters
Monthly
Seasonal
Urea nitrogen
Energy
Ewes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Veterinary Science Publications
 
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