Effect of Daily Variation of Environmental Temperature on the Growth and Digestibility of Piglets.

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  • 環境温度の日内変動幅が子豚の成長および消化率におよぼす影響
  • カンキョウ オンド ノ ニチナイ ヘンドウハバ ガ コブタ ノ セイチョウ オ

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Abstract

This study was conducted to clarify the effect of daily variation of environmental temperature with a fixed integrated temperature on the growth and digestibility of piglets. A growth test was done for 22 days and a digestibility test for 10 days using 8 male crossbred Y×W piglets; they were between 53 and 62 days of age at the start of the study. Three experimental groups were established for the different temperatures: fixed at 21°C (21°C×24 hours=504°C/day) as a control group, 21±3°C (24°C×12 hours+18°C×12 hours=504°C/day) and 21±6°C (27°C×12 hours+15°C×12 hours=504°C/day). In the results of growth test, daily gain of the control group was 0.682±0.049kg/day, and the 21±3°C group and 21±6°C group showed 0.660±0.053kg/day and 0.602±0.033kg/day, respectively. Statistical treatment showed the daily gain of the 21±6°C group to be lower than that of the control group. Daily intake in the control group was 1.33±0.023kg/day, and the 21±3°C group and 21±6°C group showed 1.30±0.06kg and 1.15±0.02kg, respectively. Statistical significance was recognized in the relation between the control group and the 21±6°C group. Feed conversion in the control group showed 51.1±2.2%, 50.5±2.0% in the 21±3°C group and 52.3±2.2% in the 21±6°C group, but no significant difference was shown among the three groups. The results of digestibility test showed no significant difference. Therefore, change of environmental temperature affected neither digestibility nor the utilization of digestable energy of piglets.

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