Effects of selenium-modified yam polysaccharide on growth performance,immune organ indices,serum biochemical,and immune indices in layer chicks

HUANG Anqun; HOU Jianan; WANG Sen; WANG Yikai; ZHAO Jinyan; GUO Liangxing; XI Lei; ZHANG Yuehong

doi:10.13557/j.cnki.issn1002-2813.2025.13.008

Abstract：This study investigated the effects of yam polysaccharide and its selenium-modified derivative(selenium-modified yam polysaccharide)on the growth performance,immune organ indices,serum biochemical,and immune indices in layer chicks.A total of 120 one-day-old healthy Hy-Line Brown chicks were randomly divided into three groups,with four replicates in each group and 10 chicks in each replicate.The control group received a basal diet,while the yam polysaccharide and selenium-modified yam polysaccharide groups were supplemented with 0.15 g/kg of yam polysaccharide or selenium-modified yam polysaccharide,respectively.The pre-test period was seven days and the formal test period was 28 days.The results showed that the final weight,average daily feed intake,and average daily gain of layer chicks in the selenium-modified yam polysaccharide group were significantly higher than those in the control group(P＜0.05),and the final weight was significantly higher than that in the yam polysaccharide group(P＜0.05).The spleen index and bursa of Fabricius index of layer chicks in the selenium-modified yam polysaccharide group were significantly higher than those in the control group(P＜0.05),and the spleen index was significantly higher than that in the yam polysaccharide group(P＜0.05).The concentrations of total bile acid(TBA),triglyceride(TG),and total cholesterol(TC)in the serum of layer chicks in the selenium-modified yam polysaccharide group were significantly lower than those in the control group(P＜0.05),while the concentrations of serum glucose(GLU),calcium(Ca),and inorganic phosphorus(P)were significantly higher than those in the control group(P＜0.05).The concentrations of serum interleukin-2(IL-2),interleukin-6(IL-6),interferon-γ(IFN-γ)and the activity of lysozyme(LZM)in the selenium-modified yam polysaccharide group of layer chicks were significantly higher than those in the control group(P＜0.05),and the concentrations of serum IL-2 and IL-6 were significantly higher than those in the yam polysaccharide group(P＜0.05).The study shows that selenium-modified yam polysaccharide can improve growth performance,immune organ development,serum biochemical,and immune indices in layer chicks,with superior efficacy over yam polysaccharide.