Effects of butyrate salts on growth performances, intestinal morphological structure and caecal microbial population of broilers
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Abstract
This study was designed to examine the effects of butyrate salts on growth performances, intestinal morphological structure and caecal microbial population of broilers. In total 1,248 one-day old chicks were randomly allocated into 4 groups with 12 replicates, which consisted of 26 birds with equal male and female, and were randomly fed the experimental diets as following: a control diet based on corn and soybean meal, control diets supplemented with 8 mg/kg flavophopholipol (as antibiotic growth promoter: AGP), 1,000 mg/kg sodium butyrate and 300 mg/kg calcium butyrate as group 2 to 4, respectively. The supplementation of AGP significantly improved the feed conversion ratio of broiler in period 1-10 day of ages (DOA) compared with control group (P<0.01), whereas butyrate salts either sodium or calcium salts provided the non-significant effect on growth performances. However, the growth performances of broilers fed butyrate salts in period 21-35 DOA has a tendency to be better than control and AGP group (P=0.06). Additionally, the broilers fed diets contained butyrate salts showed the higher crypts depth of jejunal tissue than those from control and AGP groups, but villus height was not significantly affected. Moreover, supplementation with butyrate salts significantly decreased the population of lactic acid bacteria and increased the Salmonella sp. population in caecal digesta of broilers aged 20 days, whereas the non-significant effect was found in 35 days old birds.
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