Animal Husbandry and Feed Science ›› 2022, Vol. 43 ›› Issue (6): 14-21.doi: 10.12160/j.issn.1672-5190.2022.06.003

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Compound Lactic Acid Bacteria Preparation on Growth Performance, Intestinal Microflora and Immunity of Calves

SONG Li-wen1,ZHAO Meng1,YANG Kai-xin2,GAO Min1,HU Hong-lian1   

  1. 1. Research Institute of Animal Nutrition and Feed,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China
    2. College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China
  • Received:2022-10-04 Online:2022-11-30 Published:2022-12-19

Abstract:

[Objective] This study was conducted to assess the effects of compound lactic acid bacteria preparation on growth performance, intestinal microflora, anti-oxidation capacity and immunity of calves. [Method] A total of twenty 30-day-old healthy Holstein calves of similar weights were randomly divided into a control group and an experimental group with 10 individuals for each group. The two groups were fed with the same basal diet. The experimental group received an supplementation of compound lactic acid bacteria preparation through drinking water (the ratio of drinking water to compound lactic acid bacteria preparation was 50∶1), whereas the control group received no microbial preparation in any forms. The experiment lasted for 90 days. The average daily gain and diarrhea rate of the calves in the two groups during the experiment were calculated. On days 1, 30, 60 and 90 of the experiment, the total number of bacteria as well as the number of lactic acid bacteria and Escherichia coli in the faecal samples, and the blood biochemical, antioxidant and immunological indexes were determined. [Result] No significant (P>0.05) difference in average daily gain between the experimental group and the control group was observed. The experimental group had a lower diarrhea rate than control group. The number of lactic acid bacteria in feces of the calves in the experimental group reached 1.41×107 CFU/g, which was significantly (P<0.05) higher than that of the calves in the control group, while the number of Escherichia coli in feces was significantly (P<0.05) lower than the control group. On days 30 and 90 of the experiment, the experimental group had significantly (P<0.05) higher serum content of glucose (GLU) in comparison to the control group. On days 60 and 90 of the experiment, the experimental group had significantly (P<0.05) lower serum content of total protein (TP) than the control group. The anti-oxidant indexes did not differ significantly (P>0.05) between the two groups. Calves in the experiment group had higher serum levels of IgG and IgA on day 90 of the experiment compared with the control group. [Conclusion] The addition of compound lactic acid bacteria preparation in drinking water improved the community structure of intestinal microflora and decreased the diarrhea rate of Holstein calves.

Key words: compound lactic acid bacteria preparation, daily gain, diarrhea rate, intestinal microflora, biochemical and immunological indexes, Holstein calves

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