Effects of Trehalose Supplementation on Oxidative Stress Markers in Dairy Cows at High Environmental Temperatures

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  • KITAZAKI Kohei
    Fukuoka Agriculture and Forestry Research Center, Department of Animal Production Graduate School of Medicine and Veterinary Medicine, University of Miyazaki
  • OHTANI Yoshihisa
    Meijifeed Co. Ltd., Mito Research Center
  • OBARA Yoshiaki
    Meijifeed Co. Ltd., Mito Research Center
  • OHTA Tsuyoshi
    Fukuoka Agriculture and Forestry Research Center, Department of Animal Production
  • UMEDA Taketoshi
    Fukuoka Agriculture and Forestry Research Center, Department of Animal Production
  • BABA Takeshi
    Fukuoka Agriculture and Forestry Research Center, Department of Animal Production
  • ANO Hitoshi
    Faculty of Agriculture, University of Miyazaki
  • KATAMOTO Hiromu
    Faculty of Agriculture, University of Miyazaki

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Other Title
  • トレハロースの飼料添加が暑熱環境下の泌乳牛の酸化ストレス指標に及ぼす影響
  • トレハロース ノ シリョウ テンカ ガ ショネツ カンキョウ カ ノ ヒニュウギュウ ノ サンカ ストレス シヒョウ ニ オヨボス エイキョウ

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Abstract

<p>The objective of this study was to investigate the effect of dietary supplementation with trehalose on oxidative-stress markers in the blood, milk and rumen fluid of dairy cows during the hot or comfortable season. The respective average maximum daytime temperatures in the hot and comfortable seasons were 34.2°C and 18.5°C. Six Holstein dairy cows housed in a freestall barn were divided into two groups, with each group receiving a different dietary treatment (control diet or 1.5% trehalose-supplemented diet) following a 2×2 crossover study in both seasons. In the hot season, food intake increased in trehalose-supplemented cows (P＜0.01); while milk yield and milk components were unchanged by trehalose supplementation in both seasons. In terms of the number of protozoa, the number of Entodinium increased with trehalose supplementation in both seasons (P＜0.05). The values of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity in milk increased with trehalose supplementation in both seasons (P＜0.05). Furthermore, the values of DPPH radical scavenging activity in plasma tended to increase with trehalose supplementation in the hot season. Dietary supplementation with trehalose resulted in the improvement of antioxidant activity in milk and blood. These findings suggest that trehalose supplementation might be effective for reducing oxidative stress in dairy cows during the hot season.</p>

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