Interior indicators of culled animals depending on the nosology group

The purpose of the work is to analyze the interior indicators of animals culled due to various nosologies. The result of the analysis of the culling of 37.344 cows from the dairy herds of 26 agricultural enterprises of the Republic of Tatarstan due to various diseases is presented. The following diseases were studied: obstetric-gynecological, internal non-infectious, surgical, infectious and invasive. It was found that cows culled as a result of obstetric and gynecological diseases are characterized by the maximum values of the following production indicators: duration of economic use (36.54 months), maximum lactation (2.31), age in lactation, calving, years and months (3.20; 3.24; 4.95; 64.73, respectively), live weight (556.37 kg), the number of milking days (1090.51), lifetime milk yield (20734.46 kg), the amount of milk fat and protein (769.97 and 639.75 kg), the mass fraction of fat (3.83 %). Animals culled due to internal non-communicable diseases are characterized by the highest values of the last completed lactation (2.98) and the mass fraction of protein in milk (3.22%). Individuals culled as a result of surgical diseases are characterized by a minimum milk protein yield (483.06 kg). Cows culled as a result of infectious and invasive diseases are characterized by minimum values of such indicators as the duration of economic use (27.09 months), the value of maximum and completed lactation (2.07 and 2.50), age in lactation, calving, years and months (2.78; 2.78; 4.41; 58.83, respectively), live weight (506.41 kg), number of milking days (856.86), lifetime milk yield (14519.79 kg), milk fat yield (547.25 kg), mass fractions of fat and protein in milk (3.78 and 3.13%).