Respon Tingkah Laku Birahi, Service Per Conception,Non Return Rate, Conception Rate pada Sapi Bali Dara dan Induk yang Disinkronisasi Birahi dengan Hormon Progesteron

Abstract

The aim of this study was to determine the differences ofestrous response, service per conception (S/C), non
return rate (NRR),and conceptionrate (CR) between Bali cattle heifersandcowssynchronized using intra-vaginal
progesterone hormone. Two groups of Bali cattle, 15 heifers and 15 cows, were used to examine the response
differences of estrous synchronization using progesterone hormone on reproductive performance, between
different parity. Each group was given progesterone dose of 1 mg/kg body weight. The data observed were
estrousbehavior (estrousintensity, onset of estrous, estrous percentage), and value of S/C, NRR, and CR were
analyzed by statistical analysis (t-test). The result shows the estrous intensity was significantly different (P<0.05)
between the heifers and cows. The average estrousintensity score of the heifer was 2.87±0.35, while the cows was
2.27±0.45. There was significantly different (P <0.05) in onset of estrous in the cows 41.5±5.18 hours, while in
the heifers was 50.67±3.5 hours. The estrouspercentage of the heifers and cows was the same, both of them was
100%. There was no significant difference (P>0.05) in S/Cvalue showed by the heifers (1,31±0,45)and the cows
(1,50±0,50). The average value of NRR, for heifers and cowswas 86.67% and 80.00%, respectively. The average
value of CRfor heifers and cowswas 86.67% and 80.00%, respectively.