Effect of vitamin A on digestibility of nutrients of rations kidney when fed malt
Experimentally proved the feasibility of vitamin preparations «Microvit A» in the diets of steers when fed malt. The new data on the effect of different levels of vitamin A supply of calves on digestibility of nutrients diets. Based on the studies found that in order to improve the digestibility of nutrients diets steers when fed them malt need to increase rates of vitamin A by 20% compared to the rates calculated according carotene. This increases the digestibility of dry and organic matter by 3.5 and 2.9% (P <0.01), protein - 2.9 (Р<0.05), fiber - 4.3% (Р<0.05). A further increase in the dose of vitamin A (group III) did not cause increase of digestibility of nutrients, but compared with the I group, the digestibility of dry matter was higher by 2.1%, organic - 1.5, protein 1.1%, which is close to a reliable difference.