VETERINARY AND SANITARY ASSESSMENT OF THE CONTENT OF TECHNOLOGICALLY HARMFUL SUBSTANCES IN MILK AND THEIR REMOVAL FROM THE ANIMAL BODY

Тhe unfavorable ecological situation in the zones of man-made pollution is due to non-compliance with the requirements for the treatment of plants with toxic chemicals, the uncontrollable excess of emissions from industrial enterprises and motor vehicles, man-made disasters caused by the war of liberation, etc. As a result, particularly toxic substances, compounds of lead, cadmium, mercury, strontium and other heavy metals enter the atmosphere. Heavy metals, which are part of herbicides and fungicides, medicines, fertilizers, plant growth stimulants and poisons for their protection, accumulate in the environment, in particular in feed, enter the atmosphere with combustion products, respectively, have a negative impact on the well-being of animals, quality and safety of livestock products, in particular milk. Therefore, the priority direction, under conditions of increased man-made load on the environment and animals, was and is the monitoring of heavy metals in the trophic chain: soil-plant-feed-animal-product-human. According to a number of authors, a significant amount of toxic substances, including heavy metals that enter the animal's body with feed, water and by air are removed from it through the alimentary canal, kidneys, skin and mammary gland. According to Kovalchuk I.I., Fedoruka R.S. (Kovalchuk, Fedoruk, 2006), the content of heavy metals in the milk of cows under conditions of increased technogenic load on the environment depends on the intensity of harmful emissions, the content of heavy metals in them, the set of fodder in the diet and its balance, as well as the season of keeping, the period of lactation and the level of productivity. Therefore, an important task should be a scientific and practical in-depth study of man-made environmental pollution, which would include various studies of heavy metals, toxic chemicals in soil and feed, means of correcting their impact on the metabolism of productive animals.