Feasibility of sodium long chain polyphosphate as a potential growth promoter in broilers

The objective of this study was to evaluate antimicrobial and anti-biofilm activity of sodium long chain polyphosphate (SLCPP) and effect of dietary supplementation of SLCPP on growth performance, organ characteristics, blood metabolites, and intestinal microflora of broilers. Antimicrobial activities of SLCPP were observed against O157:H7, , ser. Pullorum, , , in agar well diffusion assay. In addition, SLCPP demonstrated good anti-biofilm activity against and . Furthermore, to investigate the dietary effect of SLCPP, a total of 480 1-day-old male Ross 308 broiler chicks were randomly allotted to three dietary treatment groups (4 replicates per group, 40 birds in each replicate): an antibiotic-free corn-soybean meal basal diet (NC); basal diet + enramycin 0.01% (PC); and basal diet + 0.1% SLCPP (SPP). The experiment lasted for 35 days. Results showed that birds fed with SLCPP had higher body weight (BW) and average daily gain (ADG), and lower feed conversion ratio (FCR) during the grower phase (days 7 to 21) ( < 0.05). Except for blood urea nitrogen, all other blood biochemical parameters remained unaffected by the dietary supplementation of SLCPP. Compared to the control group, lengths of the duodenum and ileum in the SPP group were significantly shorter ( < 0.05). Moreover, counts of lactic acid bacteria (LAB), total aerobes, and spp. in jejunum as well as LAB in cecum were increased in the SPP group than in the PC group ( < 0.05). These results suggest that dietary supplementation of SLCPP might promote the growth of broilers in their early growth phase.