Effects of ruminally protected amino acids on milk yield and blood components of early lactating dairy cows fed grass silage-based diet.
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- OHGI Tsutomu
- Hokkaido Konsen Agricultural Experiment Station
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- MINEZAKI Yashuhiro
- Hokkaido Konsen Agricultural Experiment Station
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- FUJITA Mamiko
- Hokkaido Konsen Agricultural Experiment Station
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- HANADA Masaaki
- Hokkaido Konsen Agricultural Experiment Station
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- TAKAHASHI Masanobu
- Hokkaido Konsen Agricultural Experiment Station
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- SAITO Shigeru
- Nippon Soda Co., LTD.
Bibliographic Information
- Other Title
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- 牧草サイレージ主体飼養における泌乳初期牛の乳生産および血液成分に及ぼすルーメン保護アミノ酸添加の影響
- ボクソウ サイレージ シュタイ シヨウ ニ オケル ヒツニュウ ショキギュウ ノ ニュウセイサン オヨビ ケツエキ セイブン ニ オヨボス ルーメン ホゴ アミノサン テンカ ノ エイキョウ
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Description
Two experiments were conducted to examine the effects of ruminally protected methionine (RPM) and lysine (RPL) on milk yield, milk composition and blood components for early lactating dairy cows fed the diet grass silage based. In experiment 1, sixteen multiparous cows were fed a total mixed ration with or without RPM (30g/d of DL-methionine) for sixteen weeks after parturition. In experiment 2, fourteen multiparous cows were fed a total mixed ration with or without RPM (15g/d of DL-methione) and RPL (20g/d of L-lysine) for twelve weeks after parturition. DM intake and milk yields were not affected by treatment in experiment 1 and 2. However, amino acid supplementations increased milk protein contents by 0.20% unit (2.87% vs. 3.07% ; P<0.02) from 3 to 8 weeks after parturition in experiment 1, and by 0.20% unit (2.80% vs. 3.00% ; P<0.21) from 3 to 12 weeks after parturition in experiment 2. Addition of RPM increased serum concentration of methionine in experiment 1 and 2 (P<0.01). But, addition of RPL did not affect serum concentrations of lysine, in experiment 2. These results indicated that RPM supplied the amino acid limiting milk protein synthesis, and increased milk protein contents when cows were fed grass silage-based diets.
Journal
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- Nihon Chikusan Gakkaiho
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Nihon Chikusan Gakkaiho 73 (3), 417-422, 2002
Japanese Society of Animal Science
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Details 詳細情報について
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- CRID
- 1390282680170062976
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- NII Article ID
- 10025836030
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- NII Book ID
- AN00195188
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- ISSN
- 18808255
- 00215309
- 1346907X
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- NDL BIB ID
- 6253974
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed