횃대의 두께가 육계의 생산성, 피부염증 및 횃대이용성에 미치는 영향
Effect of Perch Thickness on the Performance, Contact Dermatitis and Perch Availability of Broilers
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초록
본 연구는 육계사육에서 횃대의 제공효과와 최적 두께를 구명하기 위해 진행하였다. 12일령 육계(RossⅹRoss) 288수를 24개의 독립된 공간(7.3 수/m2)에 균등한 평균 체중으로 분배하여 42일령까지 사양실험을 실시하였다. 그룹은 일반 평사사육(대조구)과 3개의 횃대 처리구(두께: 3, 4 및 5 cm)인 총 4개로 구성하였으며, 각 그룹은 6반복과 반복당 12수씩으로 배치하였다. 각 반복 별로 횃대의 길이는 1.3 m (0.11 m/수)로서높이 15 cm에 설치하였다. 조사항목으로 육계의 생산성, footpad dermatitis (FPD)과 hock burn (HB) 지표 및 횃대이용성을 확인하였다. 본연구결과, 육계사육에서 횃대의 유무와 두께에 따른 체중, 증체량, 사료섭취량 및 사료요구율은 통계적 차이가 없었다. FPD는 처리구 간 유의적차이가 없었으나, HB 지표는 4와 5 cm의 횃대를 제공한 처리구에서 일반 평사와 3 cm 두께의 횃대에서 사육한 육계에 비해 개선되었다(p<0.05). 육계가 횃대를 이용한 시간은 사육전기(12~24일령)에는 차이가 없었으나, 사육후기(25~42일령)에 횃대를 이용한 총 시간은 5 cm 두께에서 3과4 cm 두께보다 높았으며(p<0.05), 올라간 횟수에 비해서도 더 많은 시간을 보냈다(p<0.05). 그러므로 횃대는 육계의 다리질병을 줄이며, 4~5 cm의 두께를 이용하는 것이 가장 적합할 것으로 사료된다.
Abstract
This study was conducted to investigate effect of presence and thickness of the perch in broiler house. A total of 288 broiler chickens (RossⅹRoss) were equally allocated into floor pen from 12 to 42 days old. Treatments were consisted of no perch group (control; floor pen) and three perch groups (control + perch thickness of 3, 4, and 5 cm) having six replicates of twelve birds (7.3 birds/m2). The perches were provided with 1.3 m (0.11 m/bird) length and 15 cm height from the floor in each pen. The broilers were investigated the performance, footpad dermatitis (FPD) and hock burn (HB) scores and perch availability. There were no statistical (p>0.05) differences with presence and thickness of the perch on the body weight, weight gain, feed intake, and FCR of broilers. No significant differences were found among the treatments in FPD score. However, the HB score was improved in the treatments provided with 4 and 5 cm perch than groups provided with no perch and 3 cm perch (p<0.05). The perch thickness had not significantly (p>0.05) affected its availability for broilers at the starter (12 to 24 days of age), although broilers provided with 4 and 5 cm perch spent time in more (p<0.05) perching behavior than those provided with 3 cm perch at finisher (25 to 42 days of age). In conclusion, Perch is beneficial to the leg health of broilers, and 4 to 5 cm thickness is considered to be most suitable for broilers.
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