{
  "abstract": "This study aimed to investigate the effects of supplementing rumen-protected glycine and methionine to low-protein diets on the growth and development of Yudong black goats. Sixty 4-month-old Yudong black goats with comparable body weights (21.0 ± 0.74 kg) were randomly assigned to four groups: the control (CON), rumen-protected glycine (GLY), rumen-protected methionine (MET), and mixed-amino-acid (MAG) groups. The CON group was fed a basal diet containing 13.4% crude protein, whereas the GLY, MET and MAG groups received diets with 11.0% crude protein supplemented with 4 g/kg rumen-protected glycine, 4 g/kg rumen-protected methionine, and 2 g/kg rumen-protected glycine + 2 g/kg rumen-protected methionine, respectively. The experimental period lasted 60 days. Compared with the CON group, supplementation with glycine or methionine alone did not affect the growth performance of goats (p > 0.05). However, the MAG group exhibited significantly increased longissimus muscle area and C20:3n6 content, together with a significant reduction in ALB (p < 0.05). In addition, the relative abundance of Prevotella was significantly higher in the MET group than in the CON group (p < 0.05), and strong correlations existed between dominant ruminal bacterial genera and indicators of growth and slaughter performance. In conclusion, supplementation with rumen-protected amino acids in low-protein diets can markedly improve slaughter performance and meat quality of Yudong black goats without impairing their growth or normal physiological metabolism.",
  "abstract_shown": true,
  "affiliations": [
    "Collage of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.",
    "Chongqing Academy of Animal Sciences, Chongqing 402460, China.",
    "Wulong District Livestock Industry Development Center, Chongqing 408000, China."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Caiye Zhu"
    },
    {
      "affs": [
        0
      ],
      "name": "Yu Qing"
    },
    {
      "affs": [
        0
      ],
      "name": "Yue Zhang"
    },
    {
      "affs": [
        1
      ],
      "name": "Xiaoyan Sun"
    },
    {
      "affs": [
        1
      ],
      "name": "Hangxing Ren"
    },
    {
      "affs": [
        2
      ],
      "name": "Youxiang Zeng"
    },
    {
      "affs": [
        0
      ],
      "name": "Xiaoyu Huang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1twvrmz471e8f.bib",
  "cited_by": 0,
  "doi": "10.3390/ani16193002",
  "fulltext_url": "https://europepmc.org/articles/PMC13663449",
  "id": "1twvrmz471e8f",
  "issns": [
    "2076-2615"
  ],
  "landing_url": "https://europepmc.org/article/MED/42882971",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1102|Ruminant Nutrition and Digestive Physiology"
    ]
  ],
  "openalex": "W7214190262",
  "pdf_url": "https://europepmc.org/articles/PMC13663449?pdf=render",
  "pmcid": "PMC13663449",
  "pmid": "42882971",
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1twvrmz471e8f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:16Z",
      "native_id": "MED:42882971",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42882971"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "openalex:1102|Ruminant Nutrition and Digestive Physiology",
      "subfield": "plant-biology"
    }
  ],
  "title": "Effects of Rumen-Protected Glycine and Methionine Supplementation in a Low-Protein Diet on Growth and Development, Slaughter Performance, Meat Quality, and Rumen Microflora of Yudong Black Goats.",
  "title_text": "Effects of Rumen-Protected Glycine and Methionine Supplementation in a Low-Protein Diet on Growth and Development, Slaughter Performance, Meat Quality, and Rumen Microflora of Yudong Black Goats.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:16Z",
  "url": "https://research.draconitic.com/paper/1twvrmz471e8f",
  "venue": "Animals : an open access journal from MDPI",
  "versions": []
}