Effects of the Replacement of Alfalfa Hay with Early-harvested First-cut Orchardgrass Silage on Digestion and Lactation in Dairy Cows
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- Miyaji Makoto
- Hokkaido Agricultural Research Center, NARO
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- Yajima Akira
- Hokkaido Agricultural Research Center, NARO
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- Tada Shingo
- Hokkaido Agricultural Research Center, NARO
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- Sudo Kenji
- Hokkaido Agricultural Research Center, NARO
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- Aoki Yasuhiro
- Hokkaido Agricultural Research Center, NARO
Bibliographic Information
- Other Title
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- 輸入アルファルファ乾草の代替として早刈りオーチャードグラス1番草サイレージの給与が乳牛の飼料消化および乳生産に及ぼす影響
Abstract
<p>We evaluated the effect of feeding early-harvested first-cut orchardgrass silage (OGS) instead of imported alfalfa hay (ALH) on dry matter intake (DMI), lactation performance, ruminal fermentation, digestion, and N utilization in dairy cows. Six multiparous Holstein cows were used in a replicated 3×3 Latin square design with three dietary treatments, involved gradually replacing ALH and flaked corn with 2 incremental levels of OGS (0, 50, 100%). We observed that dry matter and fiber digestibility, DMI and fat-corrected milk yield increased with an increasing OGS level in the diet. The rumen total volatile fatty acid concentration was not affected by dietary treatment. The ruminal ammonia-N concentration and the proportion of acetate and butyrate increased, and propionate decreased linearly with the increasing levels of OGS. As a proportion of N intake, the urinary N excretion decreased and the retention of N increased with increasing levels of OGS, with no dietary effect observed on N secretion in milk and fecal N excretion. These results show that OGS can be used as a substitute for ALH and flaked corn and that replacing ALH with OGS can be a good approach to improve milk production and N utilization and reduce concentrate input.</p>
Journal
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- Japanese Journal of Grassland Science
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Japanese Journal of Grassland Science 67 (3), 141-148, 2021-12-25
Japanese Society of Grassland Science
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Details 詳細情報について
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- CRID
- 1390010457686235520
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- ISSN
- 21886555
- 04475933
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed