Efficiency of application of Megalak for the lactating cows

The purpose of the research is to study the efficiency of the use of Megalak additive for the lactating cows. The research was conducted under production conditions of OJSC on breeding work “Orlovskoe” of the Orel district, the Orel region. For conducting the scientific and economic experiment, clinically healthy lactating cows in the second month of lactation were selected, based on the principle of pair-analogues (by age (3 lactation)), body weight (average 515 kg), origin (black and white cattle), milk yield (an average of 20 kg of milk per day, with a fat content of 3.7%) they were divided into three groups with 6 animals in each group. The differences between experimental groups were the following: Megalak was not included into the diets of cows of the first group, in the diets of the second group it was added in the amount of 200 g per the head a day, into diets of the third group - it the amount of 400 g per the head a day. As a result of the research it was established that Megalak of 200 g per head a day allows to increase an average daily milk yeild by 13.7% in comparison with the control group, of 400 g per head a day - by 6.3%. The use of Megalak in a dosage of 400 g increases the mass fraction of fat in milk by 4.6%, in a dosage of 200 g - by 4.0%. The amount of milk fat became 18.3% more by animals of the 2 group, in the 3rd group - by 5.9%. The introduction of Megalak to the diets of 200 g per head a day, does more amount of milk protein by 13.6%, 400 g per head a day - by 5.9%. The application of Megalak additive allows to reduce the prime cost of 1 kg growth of body weight of animal of the 2 group by 12.2%, 3rd - by 0.2% in comparison with animals of the control group.