Özet:

The study aimed at determining some reproductive performance and causes of extraction by using records between 2008–2013 of 165 heads of red and black Alaca races grown in the conditions of Erzurum. The age of use for the first time in the dam is 728 days and 712 days, respectively.  The average number of seeds per pregnancy is estimated to be 1.54, the average number of seeds per pregnancy is 1.58, the average number of seeds per pregnancy is 1.58 and the average number of seeds is 1.56. The service period and average of the breeding range of red and black algae races were determined as 114 and 116 days, 397 and 393 days, respectively, and there was no influence on the race and lactation order in both characteristics (P>0.05). The production life of the cattle is estimated to be 2.7 years for the Red race and 1.8 years for the Black Alaca race. The most important cause of extraction for all ages is determined as low yield. In young cows (2-5 years old) the most important source of unwanted excretion is reproductive problems. Research findings have found that the profitability of the bread could be negatively affected due to the high age of use of the dwarfs for the first time and the short life of production of the Black Alaca cows.

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