棉子糖对草鱼生长性能与肠道黏膜形态的影响

以基础饲料作为对照组,在基础饲料中分别添加200、400、800、1 200和2 000mg/kg棉子糖的组作为5个试验组,以研究棉子糖对草鱼生长性能与肠道黏膜形态的影响。结果显示:(1)添加棉子糖能够提高草鱼的特定生长率,降低饵料系数,其中1 200mg/kg组与其余各组相比差异显著(P<0.05)。(2)各试验组肠道皱襞高度均高于对照组,除800、2 000mg/kg组外,其他试验组均显著高于对照组(P<0.05);200mg/kg组、1 200mg/kg组微绒毛高度显著高于对照组(P<0.05);除2 000mg/kg组外,其他试验组微绒毛密度均显著高于对照组(P<0.05)。本试验条件下,饲料中棉子糖最适添加量为1 200mg/kg。

Effect of raffinose on growth performance and intestinal morphology of grass carp(Ctenopharyngodon idellus)

The aim of this experiment was to investigate the effect of raffinose on growth performance of grass carp.The control group was fed with the basal diet,while the five trial groups were fed with the basal diet added with 200,400,800,1 200,2 000 mg/kg raffinose,respectively.The results showed that:(1) Specific growth rate(SGR) and feed conversion ratio(FCR) were improved by adding different quantities of raffinose,and that of group 1 200 mg/kg increased significantly(P<0.05).(2) The intestinal folds were significantly higher than that of the control group(P<0.05) except for group 800 mg/kg and 2 000 mg/kg;The intestinal microvilli of group 200 mg/kg and 1 200 mg/kg was significantly higher than that of the control group(P<0.05);The microvilli density of the other groups were significantly higher than that of the control group(P<0.05) except for group 2 000 mg/kg.Under the conditions,the opptimum addtion of raffinose was 1 200 mg/kg.