Аграрный вестник Урала № 10 (152) 2016Биология и биотехнологии
ASSESSMENT OF XENOBIOTIC CLEARANCE IN PRODUCTIVE ANIMALS UPON ITS ALIMENTARY INTAKE
Distribution and accumulating of xenobiotics in the environment exertsadverse impact on the biotic component of ecosystems which is especiallyimportant in case of the animals and plants included in a trophic chain of man.The research purpose was to carry out the analysis of content of heavy metalsand radionuclides in the diet of productive cows in a conditionally clean zoneand a zone with the increased background content of zinc, copper, iron, lead,cadmium and low-level radiation environmental pollution, and also to studyinterrelation between alimentary receipt of xenobiotics in an organism andtheir clearance through urine and excrements. Productive cows of Holstein breed2–3 lactations on three dairy and commodity farms located in zone VURS (2) andin the conditional and net zone (1) remote from sources of anthropogenic issueon distance more than 200 km were chosen as the object for the research. Weanalysed the content of metal pollutant and radionuclides of strontium-90,caesium-137 and lead-210 in components of a daily diet and forage mix forcattle in the zone with intensive industrial and low-level radiation pollutionand in the conditionally clean zone. The analysis of manure and urine ofanimals on content of anthropogenic pollutant was carried out. It wasestablished that alimentary receipt in an organism of metal pollutant andradionuclides 90Sr and 137Cs in the quantities which are on the upper bound orexceeding MDU correlates with the level of clearance of these xenobioticsthrough excrements and urine. In the zone of anthropogenic pollution content ofpollutant in manure of animals significantly exceeds a similar indicator in theconditionally clean zone.
Keywords: feeding animals, xenobiotics, radionuclides, heavy metals, clearance.
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