Abstract
본 연구는 대사에너지(ME)와 조단백질(CP) 수준이 강제환우를 실행한 산란노계의 생산성과 난품질에 미치는 영향을 구명하고자 실시하였다. 강제환우를 실시한 66주령의 이사브라운 산란계 432수 ME 3 수준(2,750, 2,800, 2,850 kcal/kg)과 CP 2수준(15, 17%)의 전체 6 종류 실험사료를 급여하였다. 조사항목으로 ME와 CP의 수준에 따른 산란율과 난중, 사료섭취량을 24주간 측정하였으며, 1일 산란양과 사료요구율을 조사하였다. 난품질은 산란시기별로 5, 50%, 산란피크, 피크 후기, 실험 종료시에 각각 Haugh unit과 난황색, 파각강도를 측정하였다. 산란율은 ME 2,800 kcal/kg과 CP 15%를 급여한 처리구에서 다른 처리구에 비하여 현저하게 높았다(P<0.05). 난중은 ME 2,800 kcal/kg을 급여한 닭에서 증가하는 경향을 나타났다. 1일 산란양은 CP 15%와 ME 2,800 kcal/kg을 섭취한 처리구에서 높은 경향을 나타냈다. 사료섭취량은 ME와 CP의 수준이 증가할수록 현저하게 감소하였다 (P<0.05). 난황색은 CP 17%를 급여한 처리구에서 CP 15% 처리구에 비하여 현저히 개선되었으며, CP 17%와 ME 2,800 또는 2,850 kcal/kg 급여구에서 높은 경향을 나타냈다. 파각강도는 CP 15%와 ME 2,800 kcal/kg을 급여한 닭에서 증가하였다. 본 연구의 결과 강제 환우계에서 산란율과 난품질을 극대화 할 수 있는 사료내 최적의 ME와 CP는 15%와 2,800 kcal/kg 수준으로 사료된다. This experiment was conducted to investigate the influence of different levels of metabolizable energy (ME) and crude protein (CP) on post-molt performance and egg quality of spent laying hens. Four hundred and thirty two, ISA Brown hens at sixty six weeks of age after molt induction were fed six experimental diets containing three ME (2,750, 2,800, 2,850 kcal/kg) with two CP (15, 17%) levels in a factorial design. The influence of ME and CP were evaluated on egg production, egg weight and feed intake throughout 24 weeks of production. Egg mass and feed conversion ratio (FCR) were measured during the experimental period. Haugh unit, yolk color and eggshell breaking strength were measured at 5%, 50%, peak, post peak and end stage of egg production. The hens fed 2800 kcal/kg diet along with 15% CP recorded the highest outcome of egg production (P<0.05). The egg weight has been shown to increase with hens receiving 2,800 kcal/kg ME. Daily egg mass tended to increase in hens fed with 15% CP and 2,800 kcal/kg ME. Feed intake decreased significantly with the level of ME and CP in the diet increased (P<0.05). Yolk color was improved significantly in eggs laid by the hens receiving 17% CP than 15% diet. It also tended to be higher in 17% CP with 2,800 or 2,850 kcal/kg ME diet treatments. Egg shell breaking strength increased with hens receiving diets of 15% CP and 2,800 kcal/kg. From this experiment it can be concluded that the ME level of 2,800 kcal/kg coupled with 15% CP could be used to achieve the higher egg production and better eggshell strength in induced molting hens.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.