EFFICACY OF MAIZE AND SAFFLOWER OIL SUPPLEMENTATION ON ESTRUS INDUCTION IN POSTPARTUM SHEEP
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Date
2022
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KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR - 585 401
Abstract
The study was conducted to find out the effect of maize and safflower oil
supplementation combined with hormonal estrus synchronization protocol and oxytocin in
postpartum ewes. Thirty-six parturiated ewes were selected and divided into 6 groups
(n=6). In all groups additional supplementation were given for 30 days from the day of
lambing. Group 1 (T0) was kept control and maintained on maize (250 gm/day/ewe) and
Group 2 (T1) was additionally supplemented safflower oil (50 gm/day/ewe). Group 3 (T2)
was kept on maize (250 gm/day/ewe) and Group 4 (T3) was additionally supplemented
with safflower oil (50 gm/day/ewe) and on 16th day GnRH (4 mcg) was injected I/M, on
23rd day PGF2α (125 mcg) was injected I/M, then all the ewes were observed for any estrus
sign, upon detection of estrus, ram was allowed to mate naturally and hCG (500 IU) was
injected I/M at the time of estrus in both groups. Group 5 (T4) was kept on maize (250
gm/day/ewe) and Group 6 (T5) was additionally supplemented with safflower oil (50
gm/day/ewe) and in both the groups oxytocin (20 IU) was injected first three days after
parturition I/M. Estrus induction rate (%) for T1, T2, T3, T4, T5 and T6 were 33.33, 50,
66.66, 100, 50, 83.33 respectively. Pregnancy rate (%) at induced estrus for group T1, T2,
T3, T4, T5 and T6 were 50, 66.66, 75, 83.33, 66.66 and 80 respectively. In conclusion,
supplementation of maize with safflower oil improved the reproductive performance of
sheep with hormonal protocol (GnRH + PGF2α + hCG), oxytocin given on first three days
after parturition has enhanced the fertility