不同纤维源对吉林白鹅肠道形态学发育的影响

Effect of Different Sources of Fiber on Intestinal Morphological Development of Jilin White Geese

为研究不同纤维源对吉林白鹅肠道形态学发育的影响,本试验分别以羊草和玉米秸秆作为日粮纤维源,选择56只吉林白鹅作为试验动物,应用组织切片技术分别对11、18、25、32、39、46、53日龄吉林白鹅小肠绒毛高度、隐窝深度、肌层厚度进行测定。结果表明:2个处理组均为空肠绒毛最长。2组肠道各段绒毛高度及肌层厚度在11~25日龄期间绝对生长值最高。羊草组鹅十二指肠及空肠绒毛高度、隐窝深度极显著高于玉米秸秆组(P【0.01)。玉米秸秆组鹅肠道各段肌层厚度高于羊草组。玉米秸秆组及羊草组鹅肠道各段绒毛高度/隐窝深度的比值总体上随日龄呈增长趋势,羊草组鹅十二指肠和空肠绒毛高度/隐窝深度的比值高于玉米秸秆组(P】0.05)。结果提示,本试验条件下,不同纤维源显著影响11~53日龄吉林白鹅肠道形态学发育,羊草组鹅十二指肠及空肠形态学发育优于玉米秸秆组。

The objective of this study was to investigate the effect of different sources of fiber on intestinal morphological development of Jilin White geese.Fifty-six geese were fed with diets containing corn straw and Leymus chinensis as the major source of fiber.The height of the villi,depth of the crypts,muscle thickness of the small intestine were measured on d 11,18,25,32,39,46and 53by the histological section technique.The results showed that jejunum villus height in geese fed corn straw and Leymus chinensis groups were greater than the other states of intestine.The absolute growth peak of the villus height and muscle thickness from d 11to 25were highest in geese fed corn straw and Leymus chinensis groups.The villus height,crypt depth of duodenum and jejunum were significantly higher in geese fed with Leymuschinensisthan that in geese fed with corn straw(P<0.01).Compared to the geese in Leymus chinensis group,those fed with corn straw had higher muscle thickness.The ratio of villus height to crypt depth positively correlated with the increasing age in different intestinal segments in corn straw and Leymus chinensis groups,and the geese in the Leymus chinensis group had higher ratio of villus height to crypt depth than that in corn straw group in the duodenum and jejunum(P>0.05).The results indicate that,under thisexperiment condition,intestinal morphological development of Jilin White geese is significantly influenced by different sources of fiber from d 11to 53,the development of duodenum and jejunum of geese fed with Leymus chinensis is better than those fed with corn straw.