Department of Animal Production Physiology, College of Animal Sciences, CCS Haryana Agricultural University, Hisar - 125 004, Haryana, India.
Fifty postpartum buffaloes were divided into five groups, four treatments (T1, T2, T3, T4) and one control (T5). Prostagladin (Lutalyse) and gonadotrophin releasing hormone (Receptal) were used in combination or alone to induce cyclicity and conception. All the animals were palpated manually, on days 10, 15, 27, 35, 45, 50, and 60 postpartum to note reproductive status. Progesteron concentration was assayed on days of rectal palpation. Treatments (T1, T2, and T3) differed significantly (P<0.01) to T4 and T5 treatments. There was no significant difference between T4 and T5. Medium and large sized follicles were observed on days 10 and 15 postpartum in treatment groups and on 20 days in control groups. In treated groups (37/38) first heat appeared within 25 – 111 days and in control group (9/12) within 25 – 104 days postpartum. Effect on hormonal treatments on occurrence of first heat and service period significantly differed levels (P<0.01) and (P<0.05), respectively than to control groups. Service period was lowest in November calvers. Months of calving and parity had no significant effect on involution of uterus periods. Primiparous animals had highest interval between calving to first heat and conception.
Buffaloes, Gonadotrophin releasing hormone, Postpartum, Prostagladin, Reproductive performance
