Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (9): 3063-3078.doi: 10.11843/j.issn.0366-6964.2022.09.022

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Study on Dietary Fibre Digestion and Its Correlation with Intestinal Microbiome of Tibetan Pigs

TAN Zhankun1, SHANG Zhenda1, CHU Guiyan2, CAI Chuanjiang2, ZHU Yanbin3, DENG Wen4, QIANGBA Yangzong1, LIU Suozhu1*   

  1. 1. Collaborative Innovation Centre of Ecological Grassland Animal Husbandry in Tibet Plateau, Tibetan Plateau Feed Processing Engineering Research Centre, College of Animal Science, Tibet Agricultural and Animal Husbandry University, Linzhi 860000, China;
    2. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China;
    3. Institute of Animal Husbandry and Veterinary Medicine, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850000, China;
    4. Tibet Tibet-Animal Husbandry He Chuang Agricultural and Animal Husbandry Technology Limited Company, Linzhi 860000, China
  • Received:2022-02-22 Online:2022-09-23 Published:2022-09-23

Abstract: With the aim of exploring the potential factors of strong fibre degradation ability for Tibetan pigs, this experiment was conducted to study the digestion of dietary cellulose and hemicellulose and their correlation with the faecal bacteria of Tibetan pigs. The apparent digestibility of dietary fibre to grazing Tibetan pigs, captive Tibetan pigs and commercial pigs[Duroc×Landrace×Yorkshire (DLY) pigs] at 150 days of age was determined by digestion test. Faecal samples were collected, and the full-length sequence of the 16S rRNA gene of faecal bacteria was determined by single molecule real-time sequencing technology. The structure and diversity of faecal bacterial community were analysed. Spearman correlation analysis was used to determine the correlation between apparent digestibility of dietary fibre and faecal bacterial community. Results showed that the apparent digestibility of dietary cellulose and hemicellulose of grazing Tibetan pigs was significantly higher than that of captive Tibetan pigs and DLY pigs (P<0.05). A total of 15 phyla, 26 classes, 48 orders, 87 families, 190 genera and 419 species of bacteria were identified from faeces of grazing Tibetan pigs, captive Tibetan pigs and DLY pigs. Furthermore, there were 1 phylum (Fibrobacteres), 3 genera (Alloprevotella, Fibrobacter, and Succinivibrio) and 3 species (Alloprevotella rava, Fibrobacter intestinalis, and Succinivibrio dextrinosolvens) which relative abundance in grazing Tibetan pigs were significantly higher than those of captive Tibetan pigs and DLY pigs (P<0.05), which were significantly positively correlated with apparent digestibility of dietary fibre (P<0.05). In conclusion, grazing Tibetan pigs have strong ability of fibre digestion, which was closely related to the fibre-degrading bacteria in faeces.

Key words: Tibetan pigs, ability of fibre digestion, bacteria, correlation

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