Influence of different multienzyme drugs on the digestibility and absorption of nutrients by broiler chickens

Abstract

Increasing the efficiency of the use of grain feeds and their processed products in the diets of highly productive poultry crosses is constrained by the presence of non-starchy polysaccharides in them, which themselves are practically not digested due to the lack of specifi c digestive enzymes in poultry. The problem is largely removed by the introduction of special feed enzymes having the appropriate activity. However, the question remains open about the eff ectiveness of certain multi enzyme compositions for the corresponding feed raw materials and the structure of diets. The purpose of the work was to study the infl uence of various multi enzyme drugs (Rovabio Excel, Akstra HAR and Vilzim) on the live weight, digestibility and absorption of nutrients of compound feed of boiler chickens. The scientifi c and economic experiment was carried out on broiler chickens of the cross Ross 308 at the Research Center for the safety and eff ectiveness of feed and additives of the Volgograd State Agrarian University. In order to conduct scientifi c and economic experiment, 4 groups of broiler chickens were formed (a control group and three experimental ones). The poultry were selected according to the method of analogues per 120 heads in each group. The live weight of experimental broiler chickens at the end of the rearing period (37 days) in the 1st experimental group was 2690,63 g, in the 2nd experimental 2719,40 g, and in the 3rd experimental 2676,11 g, which was higher than in the control by 7,53, 8,68 and 6,95 %, respectively. The use of multi enzyme drugs contributed to better digestion of nutrients by broiler chickens: crude protein by 0,66–2,14 abs.%, crude fi ber by 0,29–1,09 abs.%, crude fat by 0,29–1,18 abs.% and nitrogen-free extractive substances by 1,20–3,08 abs.%. The use of nitrogen, calcium and phosphorus by chickens of the experimental groups was higher in comparison with the control group by 0,93–3,19 abs.%, 0,65–1,86 abs.% and 0,45–1,26 abs.%, respectively. In order to increase the digestibility of feed nutrients and increase the live weight of the cross Ross 308 broilers, the enzyme additives Rovabio Excel, Akstra HAR and Vilzim should be used at a rate of 50 g, 100 g and 20 g per 1 ton of compound feed, respectively.