| Abstrakt: |
The aim of the experiment was to investigate the effect of Taxus polysaccharide on growth performance and immunity of broilers. A total of 180 seven-day-old 817 broilers were randomly divided into six groups, with three replicates per group and 10 chickens per replicate. Chickens in the blank control group (NC) were fed with a basal diet, and the other five groups were low dose of Taxus polysaccharide group (TP-L, 0.5 g/kg), medium dose group (TP-M, 1.0 g/kg), high dose group (TP-H, 2.0 g/kg) and Taxus extract polysaccharide group (TEP, 0.75 g/kg), aureomycin group (CTE, 1 g/kg). The experiment lasted for 14 d. The results showed that dietary supplementation of Taxus polysaccharide had no significant effect on growth performance of broilers (P>0.05). Thymus index of broilers in TP-L group and TP-M group was extremely higher than that in NC group and CTE group (P<0.01). Serum IgG, IgM and IgA content of broilers in TP-M group, TP-H group and TEP group were extremely higher than those in NC group (P<0.01), serum IL-1β content was extremely lower than that in NC group and CTE group (P<0.01), and serum IL-4 content was extremely higher than that in CTE group (P<0.01). The content of IL-1β and IL-6 in duodenal mucosa of TEP group were extremely lower than those in NC group and CTE group (P<0.01). The content of IL-4 in duodenal mucosa of broilers in TP-L group and TP-M group was extremely higher than that in CTE group (P<0.01). The duodenal mucosa sIgA content of TP-L group was significantly higher than that of NC group (P<0.05). The duodenal V/C value of TEP group was extremely higher than that of NC group and CTE group (P<0.01). The study indicates that Taxus polysaccharide can effectively improve the organ index and serum immune index, regulate duodenal mucosal immunity and improve duodenal absorption function, and improve immunity of broilers. Taxus polysaccharide supplemental level of 0.5~1.0 g/kg has better effect. [ABSTRACT FROM AUTHOR] |
