Poultry diets without antobiotics. I. Intestinal microbiota and performance of broiler (Gallus gallus L.) breeders fed diets with enterosorbent possessing phytobiotic and probiotic effects

Recent trend of rejection of the in-feed antibiotics in animal and poultry production launched the search for reliable alternative growth stimulators, primarily probiotics, or phytobiotics (most commonly essential oils) rendering antimicrobial and antioxidant properties to improve the digestibility of dietary nutrients, suppress the growth of pathogens, etc. Another important problem is the contamination of feeds with mycotoxins which can negatively impact the productive performance in poultry. The growth efficiency and composition of intestinal microbiota were studied in growing broiler (Gallus gallus L.) breeders of preparental lines B5 and B9 (selected at the Center for Genetic Selection “Smena”, Moscow Province) fed vegetable diets supplemented with complex preparation Zaslon 2+ (JSC Biotrof+, Russia), containing an intestinal adsorbent, a mixture of essential oils, and a strain of Bacillus sp . (105 CFU/g). Zootechnical and physiological experiments were carried out in in 2017 (Smena Center, Zagorsk EPH, Sergiev Posad, Moscow Province)...