Analysis of Fecal Bacteria Community Difference between Pre-Weaning and Post-Weaning Calves in Tibet Region

ZHANG Xinyu; LI Shengli

doi:10.3969/j.issn.1006-267x.2022.09.036

Chinese Journal of Animal Nutrition >

2022 , Vol. 34 >Issue 9: 5800 - 5808

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.09.036

RESEARCH PAPER

Analysis of Fecal Bacteria Community Difference between Pre-Weaning and Post-Weaning Calves in Tibet Region

ZHANG Xinyu ,
LI Shengli

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State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2022-03-30

Online published: 2022-10-17

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Abstract

The purpose of this experiment was to study the changes in fecal bacteria community of calves before and after weaning in Tibet region. Among 365 Holstein calves born in 2021, eight Holstein calves with similar body weight were selected. Fecal samples were collected by rectal manure method to determine the fecal bacteria community composition before weaning[(60±2) days of age] and after weaning[(120±2) days of age]. The results showed as follows:Sobs index, Ace index, Chao1 index, Simpson index and Shannon index of fecal bacteria community of pre-weaning calves and post-weaning calves were significantly different (P<0.05). 2) Principal coordinate analysis (PCoA) showed that there was a significant difference in Beta diversity of fecal bacterial community between pre-weaning and post-weaning calves (P<0.01). 3) At the phylum level, both pre-weaning calves and post-weaning calves were characterized by Bacteroidetes, Firmicutes, Actinobacteria were the dominant bacteria. Compared with pre-weaning calves, the relative abundances of Patescibacteria and Campilobacterota of fecal bacteria community of post-weaning calves were significantly decreased (P<0.05). 4) At the family level, the dominant bacteria of both pre-weaning and post-weaning calves were Lachnospiraceae, Oscillospiraceae and Prevotellaceae. Compared with pre-weaning calves, the relative abundances of Oscillospiraceae, Muribaculaceae, Rikenellaceae, Erysipelotrichaceae, Christensenellaceae, Anaerovoracaceae, Clostridiaceae, norank_o_RF39, Monoglobaceae and UCG-010 of fecal bacteria community of post-weaning calves were significantly increased (P<0.05), while the relative abundances of Lactobacillaceae, Bacteroidaceae, Ruminococcaceae, Butyricicoccaceae and Coriobacteriaceae were significantly reduced (P<0.05). 5) At the genus level, compared with pre-weaning calves, the relative abundances of UCG-005, norank_f_Muribaculaceae, unclassified_f_Lachnospiraceae, Rikenellaceae_RC9_gut_group, Prevotellaceae_UCG-003, Paeniclostridium, Christensenellaceae_R-7_group, Coprococcus, Clostridium_sensu_stricto_1, Agathobacter, norank_f_norank_o_RF39 of fecal bacteria community of post-weaning calves were decreased significantly (P<0.05), while the relative abundances of Lactobacillus, Bacteroides, Blautia and Faecalibacterium were significantly increased (P<0.05). In conclusion, in this experiment, Holstein calves are weaned at 3 months of age in Tibet region, there are obviously changes in diversity and richness of bacteria community of Holstein calves before and after weaning. This study provides reference information for the feeding and management of calves in high-altitude regions.

Key words： high altitude regions; Holstein calves; weaning; fecal bacteria community

Cite this article

ZHANG Xinyu , LI Shengli . Analysis of Fecal Bacteria Community Difference between Pre-Weaning and Post-Weaning Calves in Tibet Region[J]. Chinese Journal of Animal Nutrition, 2022 , 34(9) : 5800 -5808 . DOI: 10.3969/j.issn.1006-267x.2022.09.036

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