›› 2019, Vol. 46 ›› Issue (6): 1644-1651.doi: 10.16431/j.cnki.1671-7236.2019.06.010

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Combinations of Tannin and Zinc Oxide on Fecal Microflora, Serum Antioxidant and Liver Function Indexes in Weaned Piglets

TAO Yong1, YANG Xiaozhi1, WANG Jianyou1, XU Bin1, REN Shanmao1, SUN Qingping2   

  1. 1. Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, China;
    2. Methodo(Jiangsu) Biotechnology Co., Ltd., Yangzhou 225000, China
  • Received:2018-12-17 Online:2019-06-20 Published:2019-06-19

Abstract:

This experiment was conducted to investigate the effects of combinations of tannin and zinc oxide on fecal microbiota,serum immunity,antioxidation and liver function-related blood biochemical parameters in weaned piglets.Two hundred and seventy weaned piglets of Duroc×Landrace×Yorkshire on 25-day-old with similar body weight were randomly divided into nine groups with three replicates per group and ten pigs per replicate.Piglets in the control group were fed a basal diet supplemented with 3 000 mg/kg zinc oxide.Piglets in experimental groups 1 to 8(T1-T8) were fed basal diets added with following combinations of zinc oxide and tannin:(2 000+0),(2 000+1 000),(1 000+0),(1 000+1 000),(1 000+1 500),(1 000+2 000),(0+1 500) and (0+2 000) mg/kg,respectively.The trial lasted for 30 d.Fresh feces samples of piglets were collected on the 14th and 28th day of the trial to determine the number of 3 pathogenic bacteria in the feces.Blood samples were taken at the end of the experiment to determine immunity,antioxidant and liver function indexes in serum.The results showed that there were no significant differences in the numbers of E.coli,Lactobacillus and Bacillus bifidus in feces of piglets among each group on the 14th day of the trial (P>0.05).On the 28th day of the trial,the numbers of Lactobacillus in feces of piglets in groups T1 and T6 were extremely significantly higher than that in the control group (P<0.01),and the numbers of Bacillus bifidus in feces of piglets in groups T1 and T6 were significantly higher than that in the control group (P<0.05).However,there was no significant difference in the number of E.coli between each group (P>0.05).There were no significant differences in serum IgG and IgA content,MDA content and GSH-Px activity between each group (P>0.05).However,GSH content in serum in groups T5,T6,T7,T8 were extremely significantly higher than that in the control group (P<0.01).Except for the T2 and T5 groups,AST activity in serum of the other groups was significantly or extremely significantly lower than that of the high zinc control group (P<0.05;P<0.01).This test showed that compared with the single use of high dose zinc oxide,the appropriate combination of tannin and zinc oxide was beneficial to Lactobacillus and Bacillus bifidus proliferation,antioxidant capacity improvement of the body and liver protection in weaned piglets.

Key words: tannin; zinc oxide; weaned piglets; fecal microflora; immunity; antioxidation

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