Effects of feeding high volumes of milk replacer on reproductive performance and on concentrations of metabolites and hormones in blood of Japanese black heifer calves
© 2021 Japanese Society of Animal Science..
We evaluated the effects of feeding high volumes of milk replacer on growth and reproductive performances in Japanese black heifers. Fifty-one heifers were fed milk replacer at 9 L/day for 60 days (9 L × 60 days; n = 18) or 41 days (9 L × 41 days; n = 15), or at 7 L/day for 40 days (7 L × 40 days; n = 18). Artificial insemination (AI) was performed on heifers with ≥270 kg body weight and ≥116 cm body height at 300 days of age. The age at the first AI was 0.35 month later for 7 L × 40 days than the other groups (p < .01). However, age at calving did not differ among treatments (22.1 months). The interval from the first AI to pregnancy tended to be ~2 months longer for the 9 L × 60 days than the other groups (p = .07). Our results showed that feeding high volumes of milk replacer may reduce the age at calving via an improved rate of growth. In addition, we propose that feeding a maximum of 7 L milk replacer for 40 days may be the most appropriate rearing regime because the success of pregnancy per AI may be reduced in calves fed a maximum of 9 L for 41 and 60 days.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:92 |
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| Enthalten in: |
Animal science journal = Nihon chikusan Gakkaiho - 92(2021), 1 vom: 04. Jan., Seite e13505 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Taguchi, Yutaka [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 31.05.2021 Date Revised 28.03.2023 published: Print Citation Status MEDLINE |
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| doi: |
10.1111/asj.13505 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM320021378 |
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| 100 | 1 | |a Taguchi, Yutaka |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Effects of feeding high volumes of milk replacer on reproductive performance and on concentrations of metabolites and hormones in blood of Japanese black heifer calves |
| 264 | 1 | |c 2021 | |
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| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2021 Japanese Society of Animal Science. | ||
| 520 | |a We evaluated the effects of feeding high volumes of milk replacer on growth and reproductive performances in Japanese black heifers. Fifty-one heifers were fed milk replacer at 9 L/day for 60 days (9 L × 60 days; n = 18) or 41 days (9 L × 41 days; n = 15), or at 7 L/day for 40 days (7 L × 40 days; n = 18). Artificial insemination (AI) was performed on heifers with ≥270 kg body weight and ≥116 cm body height at 300 days of age. The age at the first AI was 0.35 month later for 7 L × 40 days than the other groups (p < .01). However, age at calving did not differ among treatments (22.1 months). The interval from the first AI to pregnancy tended to be ~2 months longer for the 9 L × 60 days than the other groups (p = .07). Our results showed that feeding high volumes of milk replacer may reduce the age at calving via an improved rate of growth. In addition, we propose that feeding a maximum of 7 L milk replacer for 40 days may be the most appropriate rearing regime because the success of pregnancy per AI may be reduced in calves fed a maximum of 9 L for 41 and 60 days | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Japanese black heifer | |
| 650 | 4 | |a age at calving | |
| 650 | 4 | |a age at first AI | |
| 650 | 4 | |a milk replacer | |
| 650 | 7 | |a Blood Glucose |2 NLM | |
| 650 | 7 | |a Fatty Acids, Nonesterified |2 NLM | |
| 650 | 7 | |a Glucose Transporter Type 1 |2 NLM | |
| 650 | 7 | |a Insulin |2 NLM | |
| 650 | 7 | |a Insulin-Like Growth Factor I |2 NLM | |
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| 700 | 1 | |a Inabu, Yudai |e verfasserin |4 aut | |
| 700 | 1 | |a Hayasaki, Koki |e verfasserin |4 aut | |
| 700 | 1 | |a Maeda, Noriyuki |e verfasserin |4 aut | |
| 700 | 1 | |a Kanmera, Yoshiro |e verfasserin |4 aut | |
| 700 | 1 | |a Yamasaki, Seiji |e verfasserin |4 aut | |
| 700 | 1 | |a Ota, Noboru |e verfasserin |4 aut | |
| 700 | 1 | |a Mukawa, Kenji |e verfasserin |4 aut | |
| 700 | 1 | |a Tsuboi, Arisa |e verfasserin |4 aut | |
| 700 | 1 | |a Miyamoto, Hirokuni |e verfasserin |4 aut | |
| 700 | 1 | |a Etoh, Tetsuji |e verfasserin |4 aut | |
| 700 | 1 | |a Shiotsuka, Yuji |e verfasserin |4 aut | |
| 700 | 1 | |a Fujino, Ryoichi |e verfasserin |4 aut | |
| 700 | 1 | |a McMahon, Christopher D |e verfasserin |4 aut | |
| 700 | 1 | |a Takahashi, Hideyuki |e verfasserin |4 aut | |
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