Effect of adsorbent and enzyme preparations onproductivity of fattening steers with diets containingheavy metals

[摘要] The territory of the Republic of North Ossetia – Alania is one of the most heavy metal contaminatedregions in the Russian Federation, due to the number of large non-ferrous metallurgy enterprises in Vladikavkaz.The research is aimed at studying the effect of enzyme preparation Celloviridin G20x and adsorbent Toxfinsupplements in the fattening steers’ diets containing an increased heavy metal level on their bio-productiveindicators. During the experiment, 40 six month-old Simmental steers were selected, which by the analogue scalewere divided into 4 groups of 10 heads each. The experiment lasted 12 months. The resulting digital material wasprocessed statistically using the Excel information program. The research results showed that the best productiveand physiological effect was obtained when joint feeding these feed additives. Thus, when joint feeding preparationsCelloviridin G20x at a dose of 70 g/t and Toxfin at a dose of 1 kg/t mixed feed, the third test group had a significantincrease in the average daily live weight gain and the energy and digestible protein to product conversion. Whenjoint feeding these preparations as part of the diet with an increased content of zinc, lead and cadmium, there was anincrease in the breakdown of feeds protein, cellulose and easily soluble carbohydrates. Due to this, the animals ofthe third test group significantly (P<0.05) exceeded their control counterparts in the digestibility coefficients of drymatter, organic matter, crude protein, crude fiber, and nitrogen free extractives. In the process of heavy metal detoxby joint feeding preparations Celloviridin G20x and Toxfin the counterparts in the third test group vs. the control fora day deposited more nitrogen in the body.

[学科分类] 农业科学（综合）

[关键词] bulls;heavy metals;dietary supplements;detoxification;gain;digestibility.