Influence of parity , type of services and some blood biochemical characteristics on productive and reproductive performance of Holstein Friesian cows
journal of kerbala university,
2013, Volume 9, Issue 2, Pages 59-66
AbstractThe study was conducted at Al-Faihaa station( 50 km north of Babil),the station had a herd of Holstein Friesian cows, and included 200 records of 40 cows ,over period lasted from 2011 till 2012, 80 viewer (2 samples/cow) for every characters from blood parameters belonged to same cow for five months (August to December) 2012 to predicting of number of production and reproduction traits through number of blood parameters after study effect of fixed factors on traits [birth weight (BW), weaning weight (WW) and services per conception (SPC)] .The over all means of BW ,WW 29.17 and 76.63 kg respectively and average of SPC reach to 1.12 service. parity had significant effect on productive traits .The dams after third calving record best BW and WW .Type of services was significant (P<0.05) on BW and surpassed to natural service while WW had no effect by type of services .the results showed was lower SPC on third calving .The type of services had significant effect ( P<0.05) on SPC and trend of the artificial services cows .Regreesion coefficient of BW was positive and highly significant( P<0.01) with level of blood glucose .Regression coefficient of BW and WW were positive and highly significant(P<0.01) With level of blood glucose Regression coefficient of SPC was negative and significant ( P<0.05) with level glucose and FSH hormone and positive and highly significant (P<0.01) with prolactin hormone.
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