Comparison of different lactation dairy yield forecasting methods in holstein and simental breed cows raised in Karacabey agriculture management directorate

In this study, 17385 real lactation milk yield records belonging to 57 cattle Simental and Black Holstein cows reared in Karacabey Agricultural Enterprise operating in Karacabey district of Bursa province of General Directorate of Agricultural Enterprises (TİGEM) were used. In this study, lactation yields were compared with lactation yield values and milk control yields with the Netherlands, Sweden, Trapeze and Vogel lactation calculation methods. With these models, lactation (305 days) milk yield estimation was made by determining the control interval values of 7, 10, 15 and 30 days from actual lactation yields. In the study, the average lactation milk yield was 6972 ± 124.9 kg. The average milk yield calculated by the Swedish method was within the 7-day control interval and the average milk yield calculated by the Vogel method was the closest to the actual milk yield average of 305 days in the 10, 15 and 30-day control interval. A statistically significant high correlation was found between 305 days actual milk yield and lactation milk yields calculated by Holland, Sweden, Trapeze and Vogel methods in all control intervals (P <0.001). Correlation between actual 305-day lactation milk yields and yields calculated by other methods; The Netherlands and Sweden methods were calculated on the 7-day control days, the Vogel method on the 10-day control days, the Vogel method on the 15-day control days and the Swedish method on the 30-day control days (P <0.001).