Association of age at first calving with longevity, milk yield, and fertility up to the third lactation in a herd of Holstein dairy cows in Japan
Author:
Affiliation:
1. Laboratory of Theriogenology, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
2. Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization (NARO), Sapporo 062-0045, Japan
Publisher
Japanese Society of Animal Reproduction
Subject
Animal Science and Zoology
Link
https://www.jstage.jst.go.jp/article/jrd/69/6/69_2023-012/_pdf
Reference30 articles.
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2. 2. Garnsworthy PC. The environmental impact of fertility in dairy cows: a modelling approach to predict methane and ammonia emissions. Anim Feed Sci Technol 2004; 112: 211–223.
3. 3. Bach A. Associations between several aspects of heifer development and dairy cow survivability to second lactation. J Dairy Sci 2011; 94: 1052–1057.
4. 4. Goodger WJ, Fetrow J, Ferguson GM, Troutt HF, McCabe R. A computer spreadsheet program to estimate the cost of raising dairy replacements. Prev Vet Med 1989; 7: 239–254.
5. 5. Linhares Boakari Y, El-Sheikh Ali H. Management of prevent dystocia. In: Hopper RM (ed.), Bovine Reproduction, Second edition. New Jersey: John Wiley & Sons, Inc; 2021: 590–596.
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