Induction of lactation in repeat breeding crossbred heifers
2009
K Mohan | N B Shridhar | Honnappa, T. G. | Ramachandra, S.G. | G C Nirmala | Jayakumar, K
The present study was carried out to induce lactation with the help of hormones or drugs in repeat breeding dairy heifers. Two groups of heifers (group 1 and 2, n=6) were treated with 0.1 mg/kg of 17â-estradiol and 0.25 mg/kg of progesterone s.c for 7 consecutive days. Both the groups of animals were administered with dexamethasone (20 mg/day) and metoclopramide (0.1 mg/kg/day) i.m on day 14 to 17. The group 2 heifers received 2 doses of prostaglandin F2á 0.25 mg i/m 10 days apart before the initiation of hormone therapy. The results revealed that the 90 day milk production in group 2 was higher as compared to the group 1. Induction of lactation in the repeat breeding crossbred heifers with prior estrus synchronization increases milk yield.
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