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Research on adaptation for hot environment by dairy cow

Research Project

Project/Area Number 11660267
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Zootechnical science/Grassland science
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

SUGANO Shigeru  Tokyo University of Agrioulture and Technology, Faculty of Agriculture, Associate Professor, 農学部, 教授 (70111482)

Co-Investigator(Kenkyū-buntansha) TAKEMURA Yuji  Tokyo University of Agrioulture and Technology, Faculty of Agriculture, Associate Professor, 農学部, 助手 (80197334)
KAMADA Toshihiko  Tokyo University of Agrioulture and Technology, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (70015121)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1999: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsDairy cow / Hot environment / Adaptation / Heat production / Energy intake / Phvsiysiological parameters / N-metylhistidine / 乳生産 / 暑熱時生理反応 / 直腸温 / 呼吸数 / 心拍数 / 自律神経機能 / 体感温度 / 育成牛 / 暑熱生理反応 / 自立神経機能 / 3-メチルヒスチジン
Research Abstract

Under hot environment, adaptability of crossbred cattle between Holstein and Japanese black (F1) and Holstein cattle (H), was compared, on several physiological parameters. Experiments were carried out using two H and F_1, calves aged 8 months. The calves were exposed to high temperature (30 ℃) for two days in the climatic chamber. Total digestible nutrients (TDN) intake and rectal temperature (RT) were measured and pneumotachogram and electrocardiogram were recorded. Blood samples were taken via jugular vein Blood samples were used for measurement of packed cell volume (PCV), hemoglobin concentration (Hb), red blood cell count (RBC), and white blood cell count (WBC). The other blood samples was separated to plasma for measurement of plasma concentration of total protein (TP), glucose (Glc), free fatty acid (FFA), and Nmethylhistidine (MeHis). TDN intake was decreased by heat stress, especially in H calves. RT in H was elevated to 40-41 ℃by heat stress, while that in F, was kept on abo … More ut 39 ℃. Respiratory rate (RR) in both calves was increased by heat stress. However, from first day to second day of 30 ℃, RR in F_1 was increased but that m H decreased. Heart rate(HR) in FI was increased by heat stress, while Holstein was decreased From these results, it is presumed that Holstein obliged to suffer the elevation of RT in spite of the decrease in heat production suggested from the decrease in TDN and HR. While F_1 could avoid the elevation of RT by the promotion of heat loss estimated from the increase in panting. The influence of heat stress on PCV, Hb, RBC, WBC, TP, and FFA in the both calves were almost not recognized. However, TP in Holstein calf were higher than that in F_1. Plasma Glc levwls were maintained within normal range through experimental periods. Plasma MeHis in the both calves was increased by heat stress. Plasma MeHis of Holstein was more increased by heat stress than that of F_1. Especially, MeHis as well as TDN intake in H-1 was greately changed. It is known that plasma MeHis of animal under energy deficient is increased due to myofibrillar protein degradation and MeHis released from myofibril increase in blood. It was presumed, therefore, that the increase in MeHis by heat stress in this study were partially caused due to decreased TDN intake. The results of this study suggest that F_1 is superior in heat tolerance to Holstein, and the characteristics of the heat tolerance in F1 are represented as the effctiv heat loss. Less

Report

(3 results)
  • 2001 Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 神谷充, 菅野茂: "ホルスタイン種およびホルスタイン種と黒毛和種の一代雑種育成牛の生理諸元にみられる暑熱の影響"関東畜産学会報. 50(1). 40-44 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] KAMIYA S., SUGANO S., et al.: "The influence of hot environment on the physiological parameteres in bull calves"Asian-Australasian J. of Animal Science. 13. 241 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kamiya M., Sugano S., Kamada T., Takemura Y., Itbashi H., Kanda S: "The influence of hot environment on physiological parameters in bull calves"Kanto Journal of Animal Science. 50(1). 40-44 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kamiya M., Sugano S., Kamada T., Takemura Y., S.Kanda, Itbashi H.: "Adaptation to heat stres by calve"Asinan-Australasian Journal of Animal Science. 13. 241 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 神谷充 他: "ホルスタイン種およびホルスタイン種と黒毛和種の一代雑種育成牛の生理諸元にみられる暑熱の影響"関東畜産学会報. 50巻1号. 40-44 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kamiya,M. et al: "The Influence of Hot Enuironment on the physiological Parameters in Bull Calves"Asian-Aus.J.Anim.Sci. Vol.13,Suppl. 241 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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