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2013 (Vol. 5, Issue: 3)
Article Information:

Influence of Energy Balance on Reproductive Performance and Milk Production of Dairy Cows at Pre-partum and Early Lactation Periods

K.B.M. Nishany, S. Ramachandra, M.B.P. Kumara Mahipala, V.P. Jayawardane and M.P.B. Wijayagunawardane
Corresponding Author:  M.P.B. Wijayagunawardane 

Key words:  BHBA, Conception rate, NEFA, open days, Postpartum, Pre-partum,
Vol. 5 , (3): 98-102
Submitted Accepted Published
June 22, 2012 July 23, 2012 June 20, 2013
Abstract:

The objective of this study was to evaluate the influence of energy balance in dairy cows at pre-partum and early lactation periods on their subsequent reproductive and productive performance. High producing, Ayrshire cows were randomly selected from the heavy pregnant, dry cow herd of Ambewela dairy farm in Up-Country, Sri Lanka. The serum NEFA (non esterifie fatty acid) and milk BHBA (beta hydroxyl butyric acid) concentrations were used as indicators of energy status of the cows. Days for the first AI, open days and conception rate were used to evaluate the reproductive performance. Sub-clinical ketosis (milk BHBA≥200 Ámol/L) was recorded among 25 and 31.25% cows at 5 days pre-partum and during 100 days post-partum periods, respectively. Further, they took significantly longer period to reach the first AI and showed significantly greater (p<0.0001) open days compared to the cows those did not show signs of sub-clinical ketosis (milk BHBA<100 Ámol/L) during the period. Cows those recorded≥200 Ámol/L BHBA level in milk during the lactation period from 10 to 60 days took longest period for the first AI and had the highest open days. Only 36% cows were pregnant at 100 days post-partum. Further, none of the cows showed sub-clinical ketosis during 100 days post-partum was pregnant. They had higher circulating NEFA levels at 5 days pre-partum and 10 days post-partum periods and significantly lower (p<0.05) in milk production compared to their pregnant counterparts. This study indicated that the magnitude and duration of the prepartum energy status (i.e., negative energy balance) has a detrimental effect on subsequent reproductive and productive performances in high producing dairy cows.
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  Cite this Reference:
K.B.M. Nishany, S. Ramachandra, M.B.P. Kumara Mahipala, V.P. Jayawardane and M.P.B. Wijayagunawardane, 2013. Influence of Energy Balance on Reproductive Performance and Milk Production of Dairy Cows at Pre-partum and Early Lactation Periods.  International Journal of Animal and Veterinary Advances, 5(3): 98-102.
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ISSN (Online):  2041-2908
ISSN (Print):   2041-2894
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