The relationships between environmental parameters in livestock pen and physiological parameters of Holstein dairy cows
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- NOHARA Masakatsu
- Department of Veterinary Associated Science, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- HISAEDA Keiichi
- Department of Veterinary Associated Science, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- ONO Tetsushi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- INOUE Yoichi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- OGAWA Kouji
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- HATA Akihisa
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- SIBANO Kenichi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- NAGAHATA Hajime
- Department of Veterinary Associated Science, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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- FUJITANI Noboru
- Department of Veterinary Associated Science, Faculty of Veterinary Medicine, Okayama University of Science, Ehime, Japan
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抄録
<p>There has been an increase in temperature and the incidence of extreme weather events, such as heat wave, due to global warming, which has promoted the incidence of livestock diseases. Therefore, it is important to examine the effect of changes in environmental parameters on livestock performance. The aim of this study was to examine the relationship between ambient environmental conditions in livestock pen and the physiological parameters of Holstein dairy cows. The results showed that there was a decrease in the red blood cell counts, hemoglobin concentrations, and mean corpuscular hemoglobin concentration of the cows with increasing pen temperature, wet bulb globe temperature (WBGT), and temperature humidity index (THI). Additionally, high daily variation in temperature caused a decrease in the serum albumin levels of the cows. Moreover, the lowest serum calcium, inorganic phosphorus, and magnesium concentrations were observed in November, and were negatively correlated with the 24-hr temperature, WBGT, and THI range of the pen prior to sampling. Multiple regression analysis showed a positive correlation between serum cortisol concentration and 24-hr WBGT range of the pen prior to samplings and packed cell volume. However, serum cortisol and total protein concentrations were negatively correlated. Overall, the findings of the study suggest that large variation in temperature induced stress in the cows, which could be overcome by increased water consumption and improved protein digestion and absorption by the animals, and the addition of minerals, such as calcium to the diet.</p>
収録刊行物
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- Ｔｈｅ Ｊｏｕｒｎａｌ ｏｆ Ｖｅｔｅｒｉｎａｒｙ Ｍｅｄｉｃａｌ Ｓｃｉｅｎｃｅ
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Ｔｈｅ Ｊｏｕｒｎａｌ ｏｆ Ｖｅｔｅｒｉｎａｒｙ Ｍｅｄｉｃａｌ Ｓｃｉｅｎｃｅ 84 (7), 964-977, 2022
公益社団法人 日本獣医学会