高温環境が子豚の成長におよぼす影響  [in Japanese] Effect of High Environmental Temperature on the Growth of Piglets  [in Japanese]

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Abstract

著者らは環境温度を日内変動させた場合, 子豚の成長におよぼす影響についての一連の研究を行っており, 特に高温環境を中心にその影響を検討してきた。本報告は高温一定環境が子豚の成長におよぼす影響について知る目的で行った。試験区は, 21℃区, 27℃区, および33℃区の3区を設定し, 母豚の分娩に合わせて2回の試験を行った。供試子豚は中ヨークシャー種×大ヨークシャー種の雌子豚6頭, 中ヨークシャー種雄17頭を用いた。2回共に各温度区の平均体重が等しくなるように配分した。各試験は, 供試子豚の内1頭が25kgに達した時点で終了した。試験期間中の飼料および水の摂取は自由とした。測定項目は, 1日当たり平均増体量, 1日当たり平均飼料摂取量, 飼料効率, 体温とした。体温以外の項目については, 試験開始時の各子豚の体重が異なるので, 共分散分析により補正した。1日当たり平均増体量は, 21℃区, 27℃区に対して33℃区が有意に低い成績を示した。1日当たりの平均飼料摂取量ならびに飼料効率は, 33℃区が21℃区に比べて有意に低い成績を示したが, 27℃区はどちらの区に対しても有意の差は認あられなかった。体温についてはほとんど差がみられなかった。このことから, 高温環境は体温にほとんど影響が見られなかったが, 増体量および飼料摂取量に影響がみられ, さらに33℃になると, その影響が顕著に表れ, 飼料効率の低下がみられた。今後はエネルギー代謝の影響も考えられることから, この点についても検討する必要があると考えられる。

Authors have studied the effect of variation of environmental temperature, especially of high temperature, on the growth of piglets. This study was conducted to clarify the effect of fixed high environmental temperature on the growth of piglets. Three experimental groups were established for the different temperature: fixed at 21°C, 27°C, and 33°C. Present experiment was repeated twice for the parturition of brood saw. Six female piglets of crossbred Y (middle york)×W (large white) and 17 male Y strain piglets were used in this study. They were distributed to each group as a same mean value of body weight. This experiment was finished at the time when one of the piglets used grew up to 25kg. Feed and water were given ad libitum over the period of growth test. Means of daily gain, daily feed intake, feed conversion and body temperature were determined and the data expect body temperature were corrected by the statistically treatment. Daily gain of the 33°C group was significantly lower than those of the other two groups (21°C and 27°C). Daily feed intake of the 33°C group was significantly lower than that of the 21°C group but that of 27°C group showed no significant difference for the other two groups. As the results, high environment temperature condition did not affect to the body temperature, but it affected to the body weight gain and feed intake. Especially the 33°C condition affected to the feed conversion apparently. It seemed that the high environmental temperature condition affect to the energy metabolism of piglets, therefore the further examination of this point is required in future work.

Journal

  • Nihon Yoton Gakkaishi

    Nihon Yoton Gakkaishi 35(4), 121-125, 1998-12-25

    The Japanese Society of Swine Science

References:  13

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008285109
  • NII NACSIS-CAT ID (NCID)
    AN10202971
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0913882X
  • NDL Article ID
    105197
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-1082
  • Data Source
    CJP  CJPref  NDL  J-STAGE  JASI 
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