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Effects of Yupingfeng Polysaccharides on Growth Performance, Immune Organ Indexes and Hepatopancreas Non-Specific Immune Indexes of Grass Carp (Ctenopharyngodon idellus)

  • WANG Zhijing ,
  • LIU Mingzhu ,
  • YU Hui ,
  • YIN Fuquan ,
  • DU Yinwei ,
  • TANG Hongyong ,
  • SHI Lin
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  • 1. College of Agriculture, Guangdong Ocean University, Zhanjiang 524088, China;
    2. College of Life Science and Engineering, Foshan University, Foshan 528231, China

Received date: 2016-05-17

  Online published: 2016-11-18

Abstract

This experiment was designed to investigate the effects of Yupingfeng polysaccharides on growth performance, immune organ indexes and hepatopancreas non-specific immune indexes of grass carp (Ctenopharyngodon idellus), thus providing a theoretical basis for Yupingfeng polysaccharide used in the aquaculture. A total of 750 healthy grass carp with similar weight body weight[(74.50±2.50) g] were randomly assigned to 5 groups with 3 replicates per group and 50 fish per replicate. The first group (group Ⅰ) was the control group and fed a basal diet, and the remaining four groups (groups Ⅱ, Ⅲ, Ⅳ and Ⅴ) were experimental groups and fed experimental diets supplementing 0.8, 1.2, 1.6 and 2.0 g/kg Yupingfeng polysaccharide based on the basal diet, respectively. The adaptation period lasted for 1 week and the formal period lasted for 8 weeks. The results showed that the weight gain rate (WGR) and specific growth rate (SGR) in experimental groups was higher than that in control group, and the differences were significant between groups Ⅳ and Ⅴ and control group (P<0.05); the feed conversion ratio (FCR) in experimental groups was lower than that in control group, and the difference was significant between groups Ⅳ and Ⅴ and control group (P<0.05). The head kidney index and spleen index in experimental groups were higher than those in control group, and the head kidney index in group Ⅳ and spleen index in groups Ⅳ and Ⅴ were significantly higher than those in control group (P<0.05). The hepatopancreas nitrogen monoxide (NO) content in experimental groups were lower than those in control group, but the difference was not significant (P>0.05). The activities of superoxide dismutase (SOD) and catalase (CAT) in hepatopancreas in experimental groups were higher than those in control group, and the differences were significant between group Ⅳ and control group (P<0.05). The hepatopancreas malondialdehyde (MDA) content in experimental groups were lower than those in control group, and the difference was significant between group Ⅳ and control group (P<0.05). On the whole, supplementation of 1.6 g/kg Yupingfeng polysaccharide in the diet can improve the growth performance and immunity of grass carp, and obtain a better feeding effect.

Cite this article

WANG Zhijing , LIU Mingzhu , YU Hui , YIN Fuquan , DU Yinwei , TANG Hongyong , SHI Lin . Effects of Yupingfeng Polysaccharides on Growth Performance, Immune Organ Indexes and Hepatopancreas Non-Specific Immune Indexes of Grass Carp (Ctenopharyngodon idellus)[J]. Chinese Journal of Animal Nutrition, 2016 , 28(11) : 3679 -3686 . DOI: 10.3969/j.issn.1006-267x.2016.11.038

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