| In this study,the polysaccharide of Chinese yam was used as the test material,and the 1-day-old broiler was fed.The effects of polysaccharide from Chinese yam on the yield,average daily weight gain,feed to gain ratio,the height of small intestine fluff,the crypt depth and the activity of digestive enzyme in the intestinal tract were investigated by animal experiments.In this experiment,360 1-day-old broiler chickens were selected in the same batch,which are healthy and gender balanced.All the selected animals were randomly divided into four groups,each group was set up with three test repeat groups,each test repeat group was selected with 30 broiler chickens.The control group fed the normal basic daily food without the polysaccharide of yam.The experimental group fed the compound feed which added the yam polysaccharide based on the daily grain of the control group,the proportion of the three groups added the yam polysaccharide is 0.025%,0.05% and 0.1% respectively.The duration of this trial is 48 days.The results of this study are as follows:(1)The effect of polysaccharide on growth performance of broilers was investigated.The weight of broiler chicken is increased by 0.05%.The results showed that the polysaccharide of Huaishan Powder can be used as potential new feed additive to improve the growth performance of broilers.(2)The results of this experiment show that the polysaccharide of Chinese yam can significantly improve the activities of duodenal and ileal amylase in broilers,and can significantly improve the activities of duodenal,hollow and ileal trypsin in broilers,and reduce the activities of lipase in broilers’ hollow and ileal.The effects of three groups of different concentrations of Chinese yam polysaccharide on digestive enzymes in the small intestine of broilers were different in different periods.Through the analysis and comparison of clinical data,the effect of adding 0.05% of Chinese yam polysaccharide in the daily diet of broilers was the best.(3)The results of this experiment show that the polysaccharide can significantly increase the ratio of the height of duodenal,hollow and ileum fluff and the height of small intestinal fluff to the depth of the hidden dimple,and the polysaccharide can reduce the depth of the hidden dimple.The study provides a data reference for the scientific application of the yam polysaccharide as a feed additive on broilers,and also provides a new idea for developing the natural green feed additive for broilers. |
