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Full-Text Articles in Medicine and Health Sciences
Heritability Estimation Of Milk Production Of Cows Of Different Origin And Breed In Karacabey State Farm, İsmet Doğan, Okan Ertuğrul
Heritability Estimation Of Milk Production Of Cows Of Different Origin And Breed In Karacabey State Farm, İsmet Doğan, Okan Ertuğrul
Turkish Journal of Veterinary & Animal Sciences
The objective of this study was to estimate heritability (h^2), a useful criterion, in the improvement studies which would be conducted to improve milk productivity in the Karacabey State Farm. A total of 760 cows, of which milk yield records were used in the study in different lactation period, consisted of 111 American Browns , 142 American Holsteins , 87 German Browns , 130 Swiss Browns , 83 Holland Holsteins and 207 Karacabey Browns. Milk yields were corrected according to the 2x305ME standardisation procedure. Furthermore, coefficients of relationship were calculated separately for Brown and Holstein cows using the pedigree cards …
Growth Analysis Of Brown Swiss And Holstein Heifers Under Harsh Climatic Conditions, Ömer Akbulut
Growth Analysis Of Brown Swiss And Holstein Heifers Under Harsh Climatic Conditions, Ömer Akbulut
Turkish Journal of Veterinary & Animal Sciences
Monthly live weights and heights at withers of Brown Swiss and Holstein heifers were compared in the period from birth to 18 months of age between 1991 and 1994. This study was carried out under harsh climatic conditions of Erzurum, situated in North-Eastern Anatolia with an altitude of 1950 m. During the experimental period annual mean temperature was 4.3 °C and minimum and maximum average monthly temperatures being -17 °C and 19.5 °C respectively. Total annual rainfall was 389 mm, and average humidity was 68.4 %. Feeding systems were based on medium quality roughage consisted of dry hay (grass, alfalfa …