›› 2018, Vol. 45 ›› Issue (3): 705-711.doi: 10.16431/j.cnki.1671-7236.2018.03.019

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Effects of Fermented Astragalus on Growth Performance and Antioxidant Function of Broilers

QIAO Hongxing1,2,3, SHI Hongtao1,2,3, SONG Yuzhen1,2,3, ZHAO Shengzhen1,2,3, BIAN Chuanzhou1,2,3   

  1. 1. College of Biological Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China;
    2. Probiotics Bioconversion Engineering Technology Research Center of Henan Province, Zhengzhou 450046, China;
    3. Key Laboratory of Probiotics Fermentation Traditional Chinese Medicine of Zhengzhou, Zhengzhou 450046, China
  • Received:2017-09-07 Online:2018-03-20 Published:2018-03-22

Abstract:

This study was aimed to investigate the effects of fermented and unfermented Astragalus on growth performance and antioxidant function of broilers.A total of 210 broiler were randomly distributed into 7 groups with 3 replicates per group and 10 birds per replicate.The broilers in group A (control group) fed with the basic diets,while that of groups B,C,D,E,F and G fed basal diet with supplement 0.2% unfermented Astragalus, 0.5% unfermented Astragalus, 0.8% unfermented Astragalus,0.2% fermented Astragalus,0.5% fermented Astragalus and 0.8% fermented Astragalus, respectively.The experimental period was 42 d,and the growth performance and antioxidant indexes of broilers were measured at the 21 and 42 d,respectively.The result showed that at the 21 d,the average daily feed intake in fermented Astragalus groups was significantly higher than that of the unfermented Astragalus groups (P < 0.05),the F/G in unfermented Astragalus groups was lower than that of the control group and fermented Astragalus groups(P < 0.05);The levels of CAT in group E was significantly higher than that in groups A and B (P < 0.05),and the activity of GSH-Px was significantly higher than group A (P < 0.05).At the 42 d,the average daily gain of fermented Astragalus groups was high,while the F/G was significantly lower than that of groups A and B (P < 0.05);The activity of GSH-Px in experimental groups was significantly higher than control group (P < 0.05),and there was no significant difference among fermented and unfermented Astragalus groups (P > 0.05).The activity of T-SOD in fermented Astragalus groups was significant higher than that in groups B and C (P < 0.05).In conclusion,adding a certain amount of fermented Astragalus in broiler diet could significantly increase the average daily gain,reduce the F/G,and improve its antioxidant capacity by increasing the activity of GSH-Px and T-SOD in serum.The effect of fermented Astragalus on growth performance and antioxidant ability of broiler was better than unfermented Astragalus with the optimum dosage was 0.5%.

Key words: broiler; fermented Astragalus; growth performance; antioxidant function

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