Effects of Enteromorpha polysaccharide dietary addition on the diversity and relative abundance of ileum flora in laying hens.

This experiment explored the effects of different levels of Enteromorpha polysaccharide dietary addition on the intestinal flora structure in laying hens. A total of 300 Hy-line brown laying hens aged 280 days old were selected according to the principle of equal weight and egg production rate. Group 1 was the blank control group fed with basic diet, Group 2 was the antibiotic control group supplemented with bacitracin zinc (0.