Environmental factors affecting milk yield traits of Brown Swiss cows raised at Ulaş State Farm and phenotypic correlations between milk yield and fertility traits
Küçük Resim Yok
Tarih
2007
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This experiment was done to study environmental factors affecting milk yield traits of Brown Swiss cows raised at the Ulå State Farm and phenotypic correlations between milk yield and fertility traits. The least-square means of 305-day milk yield, lactation duration and dry period were found as 4527 kg, 308 days and 102 days respectively. The effect of calving year on milk yield traits was found statistically significant. The effect of calving age on all milk yield traits was also statistically significant. The effect of calving season on 305-day milk yield was statistically significant. Phenotypic correlations between 305-day milk yield and lactation duration (0.38), between lactation duration and dry period (-0.16), between 305-day milk yield and calving interval (0.16), between lactation duration and calving interval (0.12) were significant.
Açıklama
Anahtar Kelimeler
Brown Swiss, Cattle, Correlation, Environmental factors, Milk yield traits
Kaynak
Indian Journal of Animal Sciences
WoS Q Değeri
Scopus Q Değeri
Q3
Cilt
77
Sayı
2
