EFFICIENCY OF MILK PRODUCTION BY INTRODUCTION OF SHARLOVSKY DIATOMITE IN THE RATION OF COWS

Comparative data on usage effectiveness of quarry and modified diatomite additives of Sharlovsky deposit of Ulyanovsk region in dairy cattle breeding are given. Assessment of parametres of physiological and biochemical status and milk productivity of Holstein cows in case of application of additives is given. The experiments were carried out on 150 cows on the basis of SPK Kolkhoz named after Kalinin, Ulyanovsk Region. The experimental groups of cows were selected by the method of analogues, taking into account age, breed, live weight and physiological state. Before start of the experiment, animal clinical condition was studied. Three groups of 50 cows were formed for scientific and economic experiment and 10 cows for physiological test. Feeding was carried out with diatomite introduction according to the following scheme: the 1st group (control) received only the farm ration (FR), the 2nd group - FR and the addition of modified diatomite at a dose of 300 g/animal/day, the 3rd group - FR and addition of quarry diatomite from the same deposit and in the same amount. The housing conditions of cows in the groups were equal. Milk productivity was recorded according to control milkings. Total duration of the experiment was 90 days. Positive results were obtained, which prove that introduction of modified and quarry diatomite supplements from Sharlovsky deposit of Ulyanovsk region into rations of Holstein cows is effective. Improvement in physiological and biochemical status and protective mechanisms of the body of cows was established. An increase of their average daily milk yield and improvement in its quality were noted when using the tested additives.