Factors Effecting of Milk Productions in Select Herds of Slovak Spotted Breed

Abstract

The aim this work was analyse factors effecting on the milk production in select breeding herds of the Slovak spotted breed. Data were analysed using the Statistical Analysis System version 9.3.1 and linear model with fixed effects of herd-year-season of calving, genetic group, father, number of lactation and cod of milk production. Average of traits of milk production was 5266.4 kg of milk, 222.19 kg of fat, 177.79 kg of proteins and 251.37 kg of lactose. The linear model to represent coefficient determination R2 = 0.598099 for milk production with all fixed effects. The analysis by the effect was the highest effect of herd-years-season of calving (0.3724) than effect of father (0.3017). Correlation coefficients between milk, fat, protein, lactose in kgs (r=0.90826, r= 0.98260, r= 0.98830), were statistically high significant.

Keywords

• slovak spotted breed
• dairy cows
• traits of milk production
• correlation
• coefficient of determination