Effects of compound feed additives on growth performance and intestinal tissue morphology of broilers
The aim of this paper was to study the effects of compound feed additives on growth performance and intestinal morphology of broilers.12001-day-old white feathered broilers were randomly divided into 4 groups with 10 replicates per group and 30 broilers per replicate.Experimental group 1 was antibacterial peptide + potassium dicarboxylate + complex acid;Experimental group 2 was antibacterial peptide + potassium dicarboxylate + plant essential oil;Experimental group 3 was potassium dicarboxylate + complex acid + plant essential oil;Experimental group 4 was antimicrobial peptide + complex acid + plant essential oil.The experiment lasted for 32 days,including 4 days of pre-feeding period and 28 days of experimental period.The results showed as follows:Compared with experimental group 1,the final body weight and average daily gain of broilers in experimental group 4 were significantly increased by 3.17%(P＜0.05),and the average daily gain was significantly increased by 3.25%(P＜0.05).The ratio of feed to gain was significantly decreased by 3.43%(P＜0.05).The apparent digestibility of crude protein and calcium of 4 broilers in experimental group was significantly increased(P＜0.05).The villus height and V/C value of duodenum of experimental group 4 broilers were significantly increased(P＜0.05);In conclusion,antimicrobial peptides + complex acids + plant essential oils can promote the growth and development of broilers by improving intestinal
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