A Study on Calving Rates and the Longevity of Brown Swiss, Holstein Friesian and Eastern Anatolian Red Breed Reared in the Erzurum Conditions

Red (ear) female animals born in 1991-2004 years at the eastern anatolian agricultural research institute (datae), in erzurum were examined. calving rate was 43.6% in the herd, that animals reached the age of 18 months and herd stayed and 56,4% did not calved. the average number of calf per cow was 3,30±0,16 in herd. these values for bs, hf and ear were 3.04±0.36, 2.30±0.30 and 3.69±0.21 respectively. the average number of calf per cow in hf was lower than that of other breeds (p<0,01). true herd live for bs, hf and ear was determined as 1130.8±.150.9, 810.4±100.8 and 1333.3±89.0 days, respectively. it was very important difference among the breeds in terms of true herd life. true herd live of calved heifers for bs, hf, and ear was 2172.9±178.9, 1718.1±121.5 and 2283.6±97.8 days, respectively. herd life for bs, hf, and ear cows was 163.6±176.2, 829.8±117.6 and 1403.0±93.7 days. according to results from experiment, ear gained an advantage over bs and hf breeds. also, bs gave an outstanding performance than that of hf breed