Аграрный вестник Урала № 10 (164) 2017Биология и биотехнологии
PECULIARITY OF NUTRITION SUBSTANCES FOOD AND MEAT PRODUCTIVITY OF CHICKEN-BROILERS AT VARIOUS VARIANTS AND DOSES OF COMBINING COMPLEX FEED ADDITIVES
The article discusses the results of the scientific and economicexperiment on the incorporation of the feed additive Karbitox in variousdosages into the ration of broiler chickens, depending on the growing period.The test additive is a mixture of mineral and organic sorbents, with aprobiotic component. It has been established that the digestibility of drymatter in broilers received as part of the feedstuff of Karbitox was higherthan in the control by 1.37–5.46 %. Inclusion of the feed additive in the diethad a positive effect on the digestibility of protein, fat, cellulose and BEVin the body of chickens. The use of nitrogen in the body of broilers experiencedgroups increased by 0.46–6.82 %. All the experimental groups of broilerchickens better assimilated calcium feed, while there was no adverse effect onthe absorption of phosphorus. Against the background of increased digestibilityof feed nutrients and the assimilation of nitrogen, calcium and phosphorusunder the influence of the additive studied the basic productive indicators ofbroiler chickens increased. Thus, in the experimental groups of chickens, asignificant increase in the live weight at the end of the growing period wasobserved in 1.9–5.8 % compared to the control, while the feed costs per 1 kg oflive weight gain decreased by 1.8–3.4 %. The European productivity index, as anindicator of the efficiency of growing broilers, was of the greatest importancein the 2 test groups: above the control level by 19 points in the cocks, and by15 points in the chickens. On the basis of the obtained results, it wasestablished that the most effective scheme for the application of Karbitox inthe diet of chickens is a gradual decrease in the dose of its introduction intothe compound feed to the finishing phase of fattening.
broiler chickens, feed additive with sorption properties, meat productivity, nutrient digestibility, nitrogen balance, calcium balance, phosphorus balance.
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