본 연구는 한국재래닭 육용실용계의 사료급여체계를 설정하기 위한 연구로서 한국재래닭 육용실용계 [Cornish ♂ × (한국재래닭 ♂ × Rhode Island Red♀) ♀] 864수를 공시하여 4주령까지는 육계전기 가루사료, 4주령에서 8주령까지는 육계중기 크럼블 사료, 8주령 이후에는 T₁은 육계후기 펠렛사료(ME 3,200㎉, CP 20.44%), T₂는(ME 3,100㎉, CP 14.88%) 자체배합한 특수배합사료를 급여하여 1996년 10월 16일부터 1997년 2월 5일까지 총 16주간의 사양시험을 실시하였으며 결과는 다음과 같다.
3원교잡 실용계에 대한 16주령 동안의 육성성적을 조사하여 생산성을 고찰하고, 육용계와의 차별화를 이룩할 수 있는 연구를 행함으로서 농가소득증대에 기여함을 목적으로 한 시험으로서 그 결과를 요약하면 다음과 같다.
1. 한국재래닭 육용실용계의 수정률은 83.9%이었고, 부화율은 69.7%이었다.
2. 육성률은 4, 8, 12 및 16주령에서 T₁이 각각 98.8%, 97.9%, 96.5% 및 94.2%이었으며, T₂에서 각각 99.1%, 95.8%, 92.8% 및 90.3%로서 0~8주령까지는 처리간에 통계적 유의차가 인정되지 않았으나, 12주령 및 16주령에서 T₂가 T₁보다 높았다(P<0.05).
3. 주령에 따른 처리별 평균체중은 4, 8, 12주령 및 16주령에서 T₁이 각각 551g, 1,379g, 2,441g 및 3,056g이었으며, T₂에서는 각각 554g, 1,360g, 2,254g 및 2,956g으로서 0~8 주령까지는 처리간에 통계적 유의차가 인정되지 않았으나, 12주령 및 16주령에서 T₂가 T₁보다 높았다(P<0.05).
4. 주령에 따른 처리별 사료요구율은 4, 8, 12주령 및 16주령에서 T₁ 및 T₂에서 각각 1.91, 2.28, 3.34, 4.23 및 1.90, 2.28, 3.53, 4.46으로서 급여사료의 영양소 수준이 달라지는 8주령 이후인 12주령 및 16주령에서 T₂가 높았다(P<0.05).
5. 사료처리에 따른 16주령 시험 전기간 동안의 1일 1수당 평균 ME섭취량은 T₁, T₂에서 각각 359㎉, 357㎉로서 처리간에 통계적 유의차가 인정되지 않았고, CP섭취량은 각각 24.8g, 20.3g 으로서 T₂가 T₁보다 낮았으며(p<0.05), 체중 1㎏증체당 ME요구량은 T₁, T₂에서 각각 13,426㎉, 13,819㎉로서 처리간에 통계적 유의차가 인정되지 않았고, CP 요구량은 각각 928g, 763g으로서 T₂가 T₁보다 낮았다(P<0.05).
This experiment was carried out to investigate the effect of feeding system on performance in Korean Native Commercial Chicken. A total 864 birds produced from [Cornish ♂ × (Korean Native Chicken ♂ × Rhode Island Red♀) ♀] crossbreeds in National Livestock Research Institute, for 16 weeks.
Feeding system of T₁ and T₂ were same types from hatch to 8 weeks, starter diets(0~4 weeks, mash, ME 3,100㎉, CP 22.94%), grower diets(4~8 weeks, crumble, ME 3,100㎉, CP 19.31%). Nutrient content of finisher diets of T₁(pellet, ME 3,200㎉, CP 20.44%) was higher than T₂ (mash, ME 3,100㎉, CP 14.88%) in order to improve meat quality for 8~16 weeks.
Fertility and hatchability of Korean Native Commercial Chicken was 83.9% and 69.7%, respectively. Viabilities of T₁ and T₂ at 0, 4, 8, 12 and 16 weeks were 98.8%, 97.9%, 96.5% and 99.1%, 95.8%, 92.8%, 90.3%, respectively. The viability of 0 to 8 weeks was not significantly in feed treatments, but 12 and 16 weeks was significantly T₁ higher than T₂(P<0.05). Body weights of T₁ and T₂ at 4, 8, 12 and 16 weeks were 551g, 1,379g, 2,441g, 3,056g and 554g, 1,360g, 2,254g, 2,956g, respectively. The body weight of 0 to 8 weeks was not significantly feed treatments but 12 and 16 weeks was significantly T₁ higher than T₂(P<0.05). Feed conversion of T₁ and T₂ to 4, 8, 12 and 16 weeks were 1.91, 2.28, 3.34, 4.23 and 1.90, 2.28, 3.53, 4.46, respectively. The feed conversion of 0 to 8 weeks was not significantly feed treatments but 12 and 16 weeks was significantly T₁ lower than T₂(P<0.05). The ME intake 1 bird per 1 day of T₁ and T₂ were 359㎉, 357㎉, respectively, not significantly feed treatments but CP intake were 24.8g, 20.3g, respectively. T₂ was lower than T₁(P<0.05) for 16 weeks. The ME requirement per ㎏ body weight gain of T₁ and T₂ were 13,426㎉, 13,819㎉, respectively, not significantly feed treatments but CP requirement per ㎏ body weight gain were 928g, 763g, respectively, T₂ was lower than T₁(P<0.05).