TY  - JOUR
TT  - Some Production Traits of Holstein, Brown-Swiss and Simmental Cattle Reared in Lalahan  Livestock Research Institute.
AU  - Koçak, Serdar
AU  - Tekerli, Mustafa
AU  - Özbeyaz, Ceyhan
AU  - Demirhan, İlkay
PY  - 2008
DA  - December
JF  - Lalahan Hayvancılık Araştırma Enstitüsü Dergisi
PB  - Uluslararası Hayvancılık Araştırma ve Eğitim Merkezi Müdürlüğü
WT  - DergiPark
SN  - 1016-877X
SP  - 51
EP  - 57
VL  - 48
IS  - 2
KW  - Holştayn
KW  - Esmer
KW  - Simental
KW  - verim özellikleri
KW  - doğum ağırlığı
KW  - yaşama gücü
N2  - Data on 223 lactation records pertaining to 90 Holstein, 31 Brown Swiss, 32 Simmental cows and 388 calves were  examined to determine the production, reproduction and calf livability in conditions of Lalahan Livestock Central Research  Institute, Ankara.  Lactation milk yield and calving interval were 5969.75 kg and 437.58 days for Holsteins, 4537.08 kg and 460.58 days  for Brown Swiss, 4806.78 kg and 440.94 days for Simmentals. Analysis of variance showed that the lactation milk yield were  significantly (P<0.001, P<0.05) affected by breed, calving year and parity. The effect of calving year on lactation length was  significant (P<0.01, P<0.05), while significant effects of breed and parity on gestation length were observed (P<0.01,  P<0.05).  The age at first calving for Holstein, Brown Swiss and Simmentals were 869.01, 936.05 and 861.90 days, respectively.  The age at first calving were significantly (P<0.05, P<0.01) higher in Brown Swiss cows. The birth weights of Holstein,  Brown Swiss and Simmental calves were 38.75, 39.30 and 39.54 kg, respectively. The effects of year, calf sex and age of  dam on birth weight were prominent (P<0.01, P<0.001). Calf livability for Holstein, Brown Swiss and Simmentals were 0.97,  0.91 and 0.98 in 30  th  day, 0.94, 0.87 and 0.92 in 90  th  day, 0.93, 0.85 and 0.92 in 180  th  day. Only 30  th  day livability were  significantly (P<0.05) lower in Brown Swiss calves than the others. In contrary to satisfactory level for milk yield, some  problems were experienced in heat detection, inseminations and herd management due to higher age at first calving, calving  interval and 180  th  day mortality rate
UR  - https://dergipark.org.tr/tr/pub/lahaed/issue//465217
L1  - https://dergipark.org.tr/tr/download/article-file/544337
ER  -