Effects of grazing mixed-grass pastures on growth performance, immune responses, and intestinal microbiota in free-range Beijing-you chickens
| Autor: | Lin Meng, Mingli Zheng, Peichun Mao, Tian Xiaoxia |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
intestinal microbiota
Rikenellaceae Population free-range chicken Poaceae medicine.disease_cause immune response Random Allocation 03 medical and health sciences Stocking Animal science RNA Ribosomal 16S Lactobacillus Grazing medicine Animals Microbiology and Food Safety Animal Husbandry education lcsh:SF1-1100 030304 developmental biology growth performance 0303 health sciences education.field_of_study biology Immunity 0402 animal and dairy science Free range food and beverages Pathogenic bacteria 04 agricultural and veterinary sciences General Medicine biology.organism_classification Animal Feed 040201 dairy & animal science Gastrointestinal Microbiome Beijing mixed-grass pasture Female Animal Science and Zoology lcsh:Animal culture Bacteroides Chickens |
| Zdroj: | Poultry Science, Vol 100, Iss 2, Pp 1049-1058 (2021) Poultry Science |
| ISSN: | 0032-5791 |
| DOI: | 10.1016/j.psj.2020.11.005 |
| Popis: | There is an increasing interest in free-range poultry with the increasing focus on food safety and animal welfare. This study was conducted to evaluate the effects of grazing mixed-grass pastures on growth performance, immune responses, and intestinal microbiota in free-range laying chickens. Ten-week-old female Beijing-you chickens were blocked by the BW and randomly assigned to 3 free-range systems in poplar plantations for 120 d: forage-removed paddocks with a high stocking density of 5 m2/hen (control [CK]); mixed-grass pastures with a low stocking density of 6 m2/hen ;or mixed-grass pastures with a high stocking density of 5 m2/hen. Intestinal microbial community analysis was performed by 16S rRNA gene sequencing using Illumina MiSeq. The results revealed that no differences (P > 0.05) were found between the 3 raising systems for the BW and ADG. Chickens grazing mixed-grass pastures exhibited decreased (P > 0.05) mortality and improved immune responses as evidenced by increased T-lymphocyte proliferation (P > 0.05) and immunoglobulin A (P > 0.05) and immunoglobulin M concentrations (P |
| Databáze: | OpenAIRE |
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