1 0 0 0 OA 5-アミノレブリン酸投与によるホルスタイン種哺育牛の血液性状に及ぼす影響
- 著者
- 髙橋 俊彦 夏井 美聡 岸田 美月 北野 菜奈 井上 誠司 菊 佳男
- 出版者
- 酪農学園大学
- 雑誌
- 酪農学園大学紀要. 自然科学編 (ISSN:21870500)
- 巻号頁・発行日
- vol.47, no.1, pp.1-6, 2022-10
During the suckling period, calves are prone to physiological anemia. Anemic calves often develop respiratory and digestive problems that lead to poor growth. As a precursor of hemoglobin, aminolevulinic acid has an oxygencarrying function in red blood cells in the body, and is expected to prevent anemia. In this study, we examined the effects of feeding aminolevulinic acid to calves on their growth and analyzed whether it had anemia-preventing effects. Our subject calves were six suckling calves, three of which were orally administered an aminolevulinic acid preparation (5 g/day for 60 days; test group), and three of which received no aminolevulinic acid (controls). At 0, 1, and 3 months of age, body weight, height, daily gain, and blood parameters (red blood cell count, hemoglobin, iron, hematocrit, white blood cell count, total protein, and total cholesterol) were measured, and the number of respiratory and digestive diseases and number of days of treatment were investigated. In the test group, body height was significantly higher at 1 month of age, and daily body mass also tended to be higher at 1-3 months of age. In blood tests, the red blood cell count and hemoglobin were below standard values at birth and at 2 months of age in both the test and control groups. Iron and total cholesterol tended to be higher in the test group at 1 and 3 months of age, while white blood cell count and total protein tended to be higher in the control group. In terms of disease status, the number of days of treatment was small in the test group, and no calves were diagnosed with anemia. These results suggest that aminolevulinic acid may improve the nutritional status of calves and be effective in promoting growth and preventing anemia.
1 0 0 0 OA 細断型梱包被覆機による自給飼料の生産・流通の革新に関する総合的研究
細断型梱包被覆機の登場は、日本の畜産業および酪農における自給飼料の生産および流通に大変革をもたらしている。本調査研究では以下のことが明らかになった。第一に、牧草や青刈りとうもろこしのサイレージおよび食品残渣を圧縮梱包することで長期保存を可能とする調製革新をもたらしている。第二に、圧縮梱包された自給飼料やTMRの広域流通を可能とする流通革新をもたらしている。第三に岩手県において青刈りとうもろこしの収穫、調製、給与の各作業の効率化による飼料構造の大変革をもたらしている。このことから細断型ロールベーラは日本畜産の競争力強化と飼料自給率の向上の有効な手段となりうることを明らかにした。