ESTIMASI NILAI RIPITABILITAS CALVING INTERVAL, SERVICE PER CONCEPTION DAN DAYS OPEN SAPI PERAH FRIESIAN HOLSTEIN DI PT. NAKSATRA KEJORA RAWASENENG TEMANGGUNG

The Research was conducted to estimate the repeatability value of Calving Intervals (CI), Service Per Conception (S/C) and Days Open (DO) Of Dairy Cattle Friesian Holstein at PT. Naksatra Kejora, Rawaseneng, Temanggung. This research used data records in the form of CI, S/C and DO from years 2006 to 2012 in PT. Naksatra Kejora of 70 cows Friesian Holstein. The repeatability was estimated based on intraclass correlation method and interclass correlation method (three and four records). The results showed that the value of CI was based on the repeatability method of the estimation of the correlation intraclass 0,04±0,02 and interclass correlation method were 0,09±0,09 and 0,06±0,07, value estimation of repeatability S/C based on the correlation intraclass methods were 0,12±0,11 and interclass correlation method were 0,10±0,08 dan 0,09±0,08 and value estimation of repeatability DO based on of correlation intraclass method were 0,51±0,09 and interclass correlation method were 0,14±0,09 and 0,08±0,08. Based on the results of this research had concluded that the value of repeatability CI and S/C either by the method of correlation intraclass and the interclass correlation was low, while the value of the repeatability DO with the method of correlation intraclass was high and with the method of correlation interclass of relatively moderate