돈사의 바닥 ( floor ) 과 보온등이 자돈의 성장 및 다리연약증 ( structural unsoundness ) 에 미치는 영향 = Effects of Types of Floor and Number of Supplemental Heat Lamps on Performance and Structural Soundness of Weaned Pigs

다국어 초록 (Multilingual Abstract)

Two trials were conducted, involving 168 weanling pigs at an average age of 45±1 days, to determine the effects of flooring materials and supplemental heat lamps on structural soundness. The pigs were housed in the environmentally controlled swine room except for in trial 1 when an outside concrete floor with a mud-sand area in half of the pen was used. Swine room temperature was maintained at approximately 15℃ and the temperature of the outside concrete floor was maintained at approximately 5-10℃. During two trials half of the fans in a mechanical ventilation system were operated to keep indoor temperature constant from the outside winter weather. The confinement housing unit where pigs were reared had an approximately 30 ㎝ deep pit. The floor was always wet with a small amount of water because of the water used in cleaning the floor of the pit. In the first trial, the three types (woven wire, wood and punched plastic) of indoor floor evaluated in this study had no significant effect (P$gt;0.05) on the average daily gain and other feed utilization. Pigs raised on the outside concrete floor gained slower and consumed more feed daily (P$lt;0.05). The foot pads (P$lt;0.05) and soundness scores (P$lt;0.01) were significantly influenced by the floor types. In the second trial, supplemental heat lamps did not have a significant effect on overall performance, but feed/gain ratio was poorer (P$lt;0.05) for pigs with no supplemental heat lamps. Pad scores were not effected by the supplemental heat lamps, while supplemental heat lamps had a significant effect (P$lt;0.01) on the soundness scores.