FERTILITAS KERBAU LUMPUR MENGGUNAKAN INSEMINASI BUATAN DAN KAWIN ALAM PASCA SINKRONISASI BIRAHI

This study was conducted to evaluate the fertility of swamp buffalo synchronized by prostaglandin administration prior to both natural mating and artificial inse-mination (AI). Thirty six swamp buffalo cows were intramuscularly injected by 35 mg prostaglandin (Lutalyse®, Pfizer, Puurs, Belgium) twice in eleven consecutive days. The buffaloes that exhibit estrous signs allotted into 2 treatments i.e. T1 (natural mating) and T2 (AI). Next to second prostaglandin injection, T1 cows were caged together with bull at 72 h for 2 d, and T2 cows were artificially inseminated at 72 h and 96 h. All cows were observed for next estrous emergence determining non return status. Pregnancy was examined 60 days after insemination by recto-vaginal palpation. The variables measured were non return rate (NRR) and concep-tion rate (CR), analyzed statistically using chi-square test. The results showed that NRR and CR of T1 and T2 had no significant difference. The NRR of T1 and T2 were 88.9% and 83.3% respectively, CR were 72.2% (T1) and 55.6% (T2). In conclusion, natural mating and AI give equal fertility to estrous synchronized swamp buffalo.