Association between age at first calving, year and season of first calving and milk production in Holstein cows
The effects of first calving (FC) in Holstein heifers on their first lactation, second lactation and lifetime milk production were examined from an initial database of 459 743 animals that first calved between 1 January 1990 and 31 July 2010 in Wallonia, Belgium. The FC age class (18 to 22, 22 to 26...
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| 主要な著者: | , , , , , |
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| フォーマット: | Artigo |
| 言語: | Inglês |
| 出版事項: |
Elsevier
2013-01-01
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| シリーズ: | Animal |
| 主題: | |
| オンライン･アクセス: | http://www.sciencedirect.com/science/article/pii/S1751731112001577 |
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