Oscillating dietary crude protein concentrations increase N retention of calves by affecting urea-N recycling and nitrogen metabolism of rumen bacteria and epithelium

• Ningning Zhang,

  Roles Conceptualization, Data curation, Project administration, Writing – original draft, Writing – review & editing

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

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• Zhanwei Teng,

  Roles Project administration

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

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• Pengtao Li,

  Roles Project administration

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

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• Tong Fu,

  Roles Conceptualization

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

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• Hongxia Lian,

  Roles Conceptualization, Funding acquisition

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

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• Linfeng Wang,

  Roles Conceptualization

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

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• Tengyun Gao

  Roles Conceptualization, Funding acquisition, Writing – review & editing

  * E-mail: dairycow@163.com

  Affiliation College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China

  https://orcid.org/0000-0001-9236-8408

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