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Nitrogen partitioning and microbial protein synthesis in lactating dairy cows with different phenotypic residual feed intake

التفاصيل البيبلوغرافية
العنوان: Nitrogen partitioning and microbial protein synthesis in lactating dairy cows with different phenotypic residual feed intake
المؤلفون: Yunyi Xie, Zezhong Wu, Diming Wang, Jianxin Liu
المصدر: Journal of Animal Science and Biotechnology, Vol 10, Iss 1, Pp 1-8 (2019)
بيانات النشر: BMC, 2019.
سنة النشر: 2019
المجموعة: LCC:Animal culture
LCC:Veterinary medicine
مصطلحات موضوعية: Lactating cows, Microbial protein, Nitrogen partitioning, Residual feed intake, Animal culture, SF1-1100, Veterinary medicine, SF600-1100
الوصف: Abstract Background Residual feed intake (RFI) is an inheritable measure of feed efficiency that is independent on level of production. However, physiological and metabolic mechanisms underlying divergent RFI are not fully elucidated. This study was conducted to investigate dietary nitrogen (N) partitioning and microbial protein synthesis in lactating dairy cows divergent in phenotypic RFI. Results Thirty Holstein dairy cows (milk yield = 35.3 ± 4.71 kg/d; milk protein yield = 1.18 ± 0.13 kg/d; mean ± standard deviation) were selected for the experiment to derive RFI. After the RFI measurement period of 50 d, the 10 lowest RFI cows and 8 highest RFI cows were selected. The low RFI cows had lower dry matter intake (DMI, P 0.10). Compared with high RFI animals, the low RFI cows had a lower retention of N (5.72 vs. 51.4 g/d, P
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2049-1891
العلاقة: http://link.springer.com/article/10.1186/s40104-019-0356-3Test; https://doaj.org/toc/2049-1891Test
DOI: 10.1186/s40104-019-0356-3
الوصول الحر: https://doaj.org/article/bc0c2f2bbc5c4a958fc2769c3ccb654eTest
رقم الانضمام: edsdoj.bc0c2f2bbc5c4a958fc2769c3ccb654e
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20491891
DOI:10.1186/s40104-019-0356-3