Влияние некоторых факторов на рост молочной продуктивности коров
2009
Bekish, R.V. | Bekish, E.I. | Ostrovets, L.M., Vitebsk State Academy of Veterinary Medicine (Belarus)
Factors which increased milk productivity (age and continuance of service period) were studied in the conditions of an educational establishment of the Republic of Belarus by an example of cows of black-and-white breed. Dynamics of growth of milk productivity in course of 8 research years was presented. Analysis of interrelation between cow productivity and cow age was given. Mathematical calculation of relations between cow productivity indexes (milk yield, fat content, butter fat) and service period duration was given. Research results showed that increasing of an average term of economic use of cows and decreasing of duration of service period up to 90 days made it possible to increase dairy effiiemcy and herd reproduction, as well as obtain higher economic efficiency
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Эту запись предоставил National Academy of Sciences of Belarus
