Influence different form of selenium to production and metatabolic process of young cattle

Abstract

Relevance. In modern conditions of intensive animal husbandry, primary importance is attached to the feeding of chelated forms of trace elements, in particular selenium. The purpose of the research was to develop norms for feeding organic selenium for calves in the dairy and post-dairy growing periods.Materials and methods. Scientific, economic and balance experience in JSC «Molodi» of the Chekhov district of the Moscow region on 55 heads of young cattle of a black-and-white Holstein breed. During the studies, the calves of the 1st control group (C-) were fed the feed of the main diet (OR) without any Se additives, while the calves of the 2nd experimental group (C+) were fed OR and Se in an amount of 0.30 mg/kg of dry matter (CB) of the diet (additionally, a premix was set, containing sodium selenite), animals of the 3rd experimental group (E100) were fed in addition to OR Se in organic form plus 0.30 mg/kg of the ration (in the dairy and post-dairy periods, analogues from the 4th experimental group (E75) were fed OR plus 0.22 mg/kg of the Se ration (in organic form), calves of the 5th experimental group (E50) were fed as a part of OR 0.15 mg/kg Se (in organic form).Results. On average, over the period of the experiment, the total average daily increase in live weight of calves of the experimental groups was, respectively, 719 g, 736 g, 781 g, 710 g (or by 6,8%, 9,4%, 16%, 5,5%) and by 8.6% more compared to the control and calves of the 2nd an experimental group that received an inorganic form of selenium according to the norms of the needs of dairy cattle.