Bu çalışmada Kahramanmaraş Tarım İşletmesinde yetiştirilen Siyah Alaca sığırların verim özellikleri incelenmiştir. İncelenen süt verim özelliklerinde en küçük kareler ortalamaları 305 günlük süt verimi, 2x-305-EÇ süt verimi, laktasyon süresi ve kuruda kalma süresi için sırasıyla 4398 kg, 4890 kg, 307 gün ve 91 gün olmuştur. Buzağılama yılı etkisi tüm süt verim özellikleri için çok önemli (PO.01) bulunmuştur. Laktasyon sırası etkisi 305 günlük süt verimi ve kuruda kalma süresi için çok önemli (PO.01) bulunmuştur. Buzağılama mevsimi etkisi 305 günlük süt verimi için önemli (P

Production characteristics of Holstein cows raised at Kahramanmaraş State Farm were studied. Least squares means were found as 4398 kg for the 305 day milk yield, 4890 for 2x-305-ME milk yield, 307 days for the lactation length, 94 days for the dry period. The effect of year on the all milk yield traits were highly significant (PO.01). The effect of lactation number on the 305 days milk yield and dry periods were highly significant (PO.01). The effect of calving season on the 305 days milk yield and 2x-305-ME milk yield were significant (PO.05) or highly significant (PO.01). The percentage variation attributed to calving season, lactation number and year in total variation respectively were 1.02, 6.87 and 20.12 % in the 305 days milk yield, 8.54, 5.33 and 19.55 % in the 2X-305-ME milk yield, 0.44 % , 0.00 and 4.00 % in the lactation periods, 0.00, 0.30 and 2.26 in the dry periods. Least squares means were found as 860 days for age at first calving, 390 days for calving interval, 110 days for service periods, 2.198 for insemination number per pregnancy. The means were found as 97.17 % for calving rate, 1.86 % for stillbirth rate, 0.97 % for abortion rate, 2.50 % for twin birth rate and 97.4 % for survival rate of calves up to the 6 months of age. The effect of year on age at firs calving, calving interval and service periods were significant (PO.05) or highly significant (PO.01). The effect of lactation number and season on insemination number per pregnancy were highly significant (PO.01).