Study of the effects of some genetic and environmental factors on the milk yield and milk composition of milk from the Rodopi breed
Study of the effects of some genetic and environmental factors on the milk yield and milk composition of milk from the Rodopi breed
Panaiotova, M.; Gadzhev, D.; Mihailova, G.; Iliev, T.; Tsvetanova, Y.
Zhivotnov"dni Nauki (Suppl): 166-172
1997
576 milk samples from 137 cows (daughters of 22 bulls at an experimental station in Smolyan, Bulgaria) were studied. Calendar month had a large and significant effect on the percentages of fat, protein and casein, explaining 22.45, 26.85 and 25.33% of the total variance for the 3 traits respectively. The average values of the 3 traits decreased from 5.24, 3.19 and 2.15% respectively for the 4th month to 4.33, 2.80 and 1.86% respectively for the 6th month of lactation.