The Reproductive Ef ciency of Filial Ongole (PO), Limousin and Simmental Crossbred Cows at Situbondo District

Abstract

The ef ciency of reproduction is very important to be maintained on cows, because they will produce offspring on their lifetime. Cross breeding is a method that usually used to increase the beef cattle population on the farm. Nevertheless it causes the performances of reproduction will reduces in some population. The objective of this research was to evaluate the reproductive ef ciency of beef cattle which were raised by the farmer in the source breeding area at Situbondo District. The materials used in this research were 333 cows of Filial Ongole cattles (PO), Limousin and Simmental Crossbred cattle at the third and fourth parity condition which were resulted by arti cial insemination (AI) and taken from the AI acceptor record card. The research variable observed was the reproductive performance of PO cows, Limousin cows, and Simmental cows including Conception Rate (CR), Service per conception (S/C), Days open (DO), Calving Interval (CI )and Index Fertility (IF). The data were analyzed by using descriptive analysis and unpair t-test comparison. The results showed the average of CR, S/C, DO, CI and IF at the third parity were 64.28%; 1.42±0.58; 125.28±24.20 of days; 411.06±24.05 days; 45.27 on PO cows; 61.86 %; 1.39±0.51; 114.24±16.31of days; 399.79±16.51 of days; 55.37 on Limousin cows; 65.04 %; 1.40±0.58; 113.10±19.05 of days; 398.30±18.85 of days; 58.42 on Simmental cows. Meanwhile the average value of CI, S/C, DO, CI and IF at the fourth parity condition were 65.17%; 1.41±0.59; 123.94±21.49 of days; 409.54±22.02 of days; 47.21 for PO cows; 67.79 %; 1.37±0.58, 116.46±20.54 of days; 402.44±21.17 of days; 58.48 for Limousin cows; and 60.19 %; 1.46±0.59; 116.46±16.11 of days; 398.56±16.56 of days; 53.22 for Simmental cows. The value of DO and CI between Simmental cows and Limousin cows did not show any signi cant difference (p>0.05), meanwhile those value showed the signi cant difference (p<0.05) on Simmental and Limousin cows with PO cows. It can be concluded that with a good breeding maintenance management, the reproduction on Limousin and Simmental crossbred is more ef cient than PO cows.