魔芋甘露寡糖对黄颡鱼非特异性免疫功能及生长的影响

以健康黄颡鱼为试验鱼,按投喂饲料的不同分为5组,3个平行.对照组投喂基础饲料,试验组KM0.1、KM0.2、KM0.3、M0.3在基础饲料中分别添加0.1%、0.2%、0.3%的魔芋甘露寡糖及0.3%的酵母甘露寡糖,研究日粮中添加不同含量甘露寡糖对黄颡鱼非特异性免疫功能及生长的影响.结果表明:投喂0.2%魔芋甘露寡糖14~28 d,血液白细胞吞噬活性显著高于对照组,14 d吞噬百分率PP、吞噬指数PI达到最大值,分别为66.00%、5.24.在整个试验过程中,KM0.3、M0.3组与对照组之间PP、PI均无显著性差异.KM0.2组与对照组相比能显著增强血清溶菌酶、超氧化物歧化酶活性,在第35天时溶菌酶活性达到最大值(0.31),第7天时SOD活性达到最大值(136.67).除第42天外,KM0.3、M0.3组与对照组SOD活性无显著性差异.投喂不同含量魔芋甘露寡糖均能增加黄颡鱼头肾指数、后肾指数、脾体指数,促进生长、降低饵料系数.KM0.2组质量增加率最高(95.68%)、饵料系数最低(1.63).0.3%酵母甘露寡糖组与对照组相比也能显著促进黄颡鱼的生长,降低饵料系数,其中质量增加率为64.91%、饵料系数为1.84.

Effect of Konjac Mannan Oligosaccharides on Non-Specific Immune Function and Growth of Pelteobagrus fulvidraco

This experiment was conducted on healthy Pelteobagrus fulvidraco to study the effects of mannan oligosaccharides on non-specific immune function and the growth.The experimental fishes were divided into five groups.There are three replicates for each group.The control group(C) contained no mannan oligosaccharides,the treatment groups(KM0.1,KM0.2,KM0.3,M0.3) were contained 0.1%,0.2%,0.3% of konjac mannan oligosaccharides(Kon-Mos) and 0.3% of yeast cell wall mannan oligosaccharides,respectively.The results showed that:between 14 and 28 day,the phagocytic activity of leukocytes in group KM0.2 were significantly higher than the control group(P<0.05),phagocytic percentage and phagocytic index reached to the top level on the 14 d,66.00%,5.24,respectively.The phagocytic activity of leukocytes in group KM0.3,M0.3 were not significantly higher than the control group(P>0.05).The lysozyme activity,blood serum superoxide dismutase activity in group KM0.2 were significantly higher than the control group(P<0.05),LSZ reached to the top level on the 35th day,SOD reached to the top level on the 7th day,0.31,136.67,respectively.The blood serum superoxide dismutase activity in group KM0.3,M0.3 were not significantly higher than the control group.Fish fed diets with Kon-Mos supplementation had significantly higer viscera index,growth rate and lower feed conversion ratio.The growth rate of group KM0.2 was the highest(95.68%),and feed conversion ratio was the lowest(1.63).The group M0.3 had significantly higher growth rate and lower feed conversion ratio than the control group,64.91%,1.84,respectively.