DAMPAK SINKRONISASI BERAHI MENGUNAKAN PROGESTERON TERHADAP BERAHI DAN KEBUNTINGAN SAPI BETINA MILIK RAKYAT KABUPATEN SUKOHARJO

Abstract

The aim of this study was to determine the effect of estrus synchronization using progesterone for old heifers and cowsof breeder in Sukoharjo District. The research materialswere 12 old heifers and38 cows. Thematerials of research weresynchronized used progesterone hormone on vagina sponge. The hormone progesterone was placing in the vagina and pulled out the sponge on day 18. Allestrus heifers and cows were inseminated used frozen semen. The parameter of the research was number of estrus and pregnant. The data obtained were analyzed used Chi-square and statistics of descriptive. The results of the study showed 10 (91.67%) old heifers and 25 (65.79%) cows were estrus.The gestation rate for old heifers and cows showed 4 (44.44 %) and 13 (68.42%), respectively. The chi-square analysis showed highly significant different (P<0.01) for the number estrus between heifers and cows.In other hand, significantly different (P<0.05) were showed for chi-square analysis of pregnancy between heifers and cows. The conclusion The Conclusion, that thesuccess ofestrusoldheifersnotin linewiththe success ofpregnant. Cowsareestrus, becamepregnantmorethanoldheifers. Keywords: synchronizationestrus,progesterone, gestation, beefcows.