Vol. 10, Special Issue 6 (2021)

Author(s):
Ramalakshmi N, Srinivas Manda, Moulikrishna K and Sreedevi B

Abstract:
The present study is undertaken in 24 postpartum acyclic crossbred cows maintained under rural managemental conditions. The cows are randomly divided into three groups viz., Ovysynch, Ovysynch + PRID, PRID + PG and efficacy was recorded. The estrus response (per cent) is observed as 75.00, 100.00 and 87.50 with the mean duration of estrus (hours) as 50.62 ± 8.39, 68.00 ± 2.61 and 58.63 ± 9.36 for Group I, II and III, respectively. Intensity of estrus exhibited is higher in Group II (62.5%) followed by Group III (50.0%) & Group I (25.0%), respectively. The first service conception rate (per cent) is 50.00 in both Group I and III, whereas it is recorded lower in Group II (37.50). The overall conception rate (per cent) is highest in Group III (62.50) followed by Group I and Group II (50.00, each) with no significant difference (P>0.05). It is concluded that Ovysynch + PRID protocol resulted in better estrus exhibition, while PRID + PG protocol is effective in obtaining optimum conception rate with fixed time Artificial Insemination in postpartum acyclic cows.