Effects of Oligo-Chitosan on Growth Performance and Development of Immune Organs of Broilers

To study the effects of oligo-chitosan on growth performance and development of immune organs of broilers,a total of 480 one-day-old healthy Arbor Acre(AA) broilers were randomly divided into four groups,and each group was replicated six times with 20 broilers.The control group was fed with the corn-soybean basal diet;the antibiotics group was fed with basal diet added 50 g/t Aureomycin;and the experimental group I(oligo-chitosan low dose group) and group Ⅱ(Oligo-Chitosan high doses group) were fed with the basal diet supplemented with 20 mg/kg,40mg/kg oligo-chitosan respectively for 42 days.Compared with the control group and the antibiotics group of the same age,the average daily gain and body weight of broilers in the experiment group I and Ⅱ increased more significantly(P0.05),the weight and organ indexes of immune organs increased and there were significant differences in part of these data(P0.05),but the feed to gain ratio of the experiment group decreased obviously.The results showed that the basal diet supplemented with 20 mg/kg,40mg/kg oligo-chitosan could obviously promote the growth performance of broilers and the development of immune organs,improve the average daily gain and feed conversion ratio of broilers,and enhance the immune function of organism.