Abstract
The ’Silos’ software package was used to formulate diets for all of the animals involved in the study. Cows of the Holstein black-and-white breed were divided into three groups. They were fed grain and legume haylage conserved with the biological fermentation products ’Biosib’ and ’Silostan’. The milk samples were analysed for chemical composition and physico-chemical properties. It was found that compared to the control group the samples of milk obtained from the test groups contained more dry matter (by 0.08 % and 0.13 %), milk-solids-nonfat (by 0.04 % and 0.06 %), fat (by 0.04 % and 0.07 %), fat (by 0.01% and 0.03 %), lactose (by 0.02% and 0.03 %), energy value was larger by 0.56 kcal (0.77 %) and 0.98 kcal (1.35 %). The quality of raw meat was assessed after the control slaughter of the black-and-white bull calves aged 18 months. Before slaughter the animals were fed alfalfa haylage conserved with the biological fermentation product ’Biotrof’ at doses of 2, 4 and 6 l of the process solution per 1 ton of the grass. Compared to the control group the average meat samples obtained from the 1st-3rd test groups contained more dry matter (by 0.48-1.03 %), fat (by 0.29-0.84 %), protein (by 0.25.63 %), maturity rate was higher by 0.55-1.55 %, energy value per 1 kg of meat was higher by 155-436 kJ (2.03-5.70 %; P<0.05).
Highlights
The present day Russian cattle industry should be based on highly productive livestock in order to be competitive and cost-efficient on the market and ensure the country's food independence
The composition of milk and quality of dairy products is known to largely depend on the diet. This is due to the fact that microorganisms inhabiting the rumen of ruminants secrete enzymes that change the feed nutrients significantly
The study revealed that 'Bosib' and 'Silostan' conservatives used for grain and legume haylage had a positive effect on the milk composition and characteristics (Table 1)
Summary
The present day Russian cattle industry should be based on highly productive livestock in order to be competitive and cost-efficient on the market and ensure the country's food independence Animal productivity depends both on heredity and environmental conditions, primarily on feeding [1,2,3,4,5]. It will result in higher efficiency of nutrient use and better animal productivity [8]
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