Assessment of influence of biostimulating medicines on the cow milk cheeseability

Abstract

The article shows the research results of qualitative composition and technological characteristics of milk in case the food ration of cows is added by biostimulant belonging to the category of synthetic phytohormone “Irkutin”. To hold the experiment 5 groups of first-calf heifers of black and motley breed, up to 10 heads in each have been created. The division was based on the principle of analogs. The selection of animals was made according to the following criteria: live mass, dairy efficiency level, month of calving and their physiological state. The 1st group (control group) as was bred on the main diet of the farm. “Irkutin” was introduced in different doses into the main diet of cow experiment groups II, III and IV. Medicine was given to animals in the morning, once every 3 days. “Irkutin” represents a biostimulant from the category of synthetic phytohormones (growth substance). As an analog, for comparison of impact of “Irkutin” on milk structure and milk properties, extract of eleuterococcus spiny, natural biostimulant. Eleuterococcus was introduced into the diet of group V of cows in a dose 40 ml per head. Research shows that the introduction of “Irkutin” and extract of spiny eleutherococcus into the ration influenced fat and protein content of milk given by fresh cows. It was proved that the best characteristics of cheeseability were shown by the animals of the fourth experimental group. It coagulated more quickly under the influence of rennet shaping dense and elastic clot.