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Effect of environmental temperature on the growth and physiological response of piglets



Effect of environmental temperature on the growth and physiological response of piglets



Japanese Journal of Swine Science 29(3): 139-144



This study aimed to observe the effects of alteration in environmental temperature for a day on the growth and physiological responses of piglets. Experiments were conducted twice for the difference of parturition of brood boars in the three levels of integrated temperature (IT) which was calculated by the integration of environmental temperature measured once an hour with respect to 24 hours and they were: 504 degree C (control: P 21 degree C times 24 hours), 600 degree C (21 degree C times 16 hours + 33 degree C times 8 hours) and 696 degree C (21 degree C times 8 hours +33 degree C times 16 hours). Piglets used were crossbred of Y times YW and Y times L, their numbers were 6 and they were 40, 41, cntdot cntdot cntdot , 45 days of age, respectively. Piglet was fed in a single cage under the controlled temperature, feeding was finished on the day when one of them reached 25 kg of body weight. The body weight gain and feed intake, which were corrected for the initial body weight, were lowered with increasing IT (P lt 0.05). Feed conversion showed no differences among these IT groups, but the ratio of water intake to feed intake increased significantly (P lt 0.05) with the increasing IT. The physiological responses in body temperature, body surface temperature and respiration rate showed no difference in the same temperature among the different IT groups, but their values were apparently higher in 33 degree C period. These results showed that the extension of exposure time to 33 degree C inhibits the growth of piglets under the assigned levels of IT in the present study.

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