Is an increase in antioxidant capacity for dairy cows under hot summer season with feed improvement compatible with energy efficiency improvement?

2015 Fiscal Year Final Research Report

• Project/Area Number: 25450397
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Animal production science
• Research Institution: Hiroshima University
• Principal Investigator: Kurokawa Yuzo 広島大学, 生物圏科学研究科, 准教授 (00234592)
• Co-Investigator(Kenkyū-buntansha): Obitsu Taketo 広島大学, 生物圏科学研究科, 教授 (30194632)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 酸化ストレス / 抗酸化能 / 乳牛 / 乳生産 / エネルギー代謝 / グルコース / メチオニン / 夏季暑熱

Outline of Final Research Achievements

The objective of this study was to grasp the relationship between oxidative status and energy metabolism of dairy cows in hot summer season. Exp1; in hot summer season, blood glucose and vitamin C were decreased, but MDA, oxidative stress marker, was not affected. It was suggested that in summer hot season reactive oxygen spices synthesis was decreased with the change in glucose metabolism, and uptake of vitamin C, which is antioxidant, by peripheral tissue cell increased. Exp2; supplementation of bypass-methionine in hot summer season decreased uptake of glucose by mammalian tissue. This result suggested that bypass-methionine supplementation increased glutathione synthesis in the liver and decreased the uptake of glucose by the mammalian tissue without increase in MDA. In conclusion, it was suggested the possibility of development of feeding technology for preventing oxidative stress without negative effects on milk production in hot summer season.

Free Research Field

家畜生産学