• KOREAN POULTRY JOURNAL
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• v.11 no.5 s.115
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• pp.66-72
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• 1979

여기에 소개하는 Purina Bio-Mitten$^{T,M}$ 프로그램은 작년 9월 브라질의 리오데 자네이로 에서 개최된 세계 가금학회의 종계세미나에 발표한것으로 랄스톤 퓨리나에서 최근 개발한 새로운 양계점등프로그램이다.

• KOREAN POULTRY JOURNAL
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• v.49 no.11
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• pp.140-142
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• 2017

창간호를 맞아 1970년대부터 1990년대 초까지 왕성하게 활동했던 육계${\cdot}$산란계${\cdot}$종계 병아리${\cdot}$메추리 등 암수 감별전문가 곽용숙 대표를 만나 인터뷰한 내용을 소개한다.

• KOREAN POULTRY JOURNAL
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• v.36 no.2 s.412
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• pp.96-98
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• 2004

최근 고병원성 가금 인플루엔자의 발생으로 양계농가가 많은 어려움을 겪고 있으며, 또한 이로 인하여 양계산업이 붕괴되는 것이 아닌가 우려되고 있다. 이러한 상황에서 종계를 하는 입장에서 답답하고, 한심한 생각만 들뿐이다. 어찌하였든 이미 벌어진 일을 우리는 수습하여 다시 일어서야만 하지 않을까?

• KOREAN POULTRY JOURNAL
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• v.38 no.7 s.441
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• pp.178-182
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• 2006

제14회 전국육계인대회 성료/ 회장단 회의 개최/ 종계DB추진 협의회/ 채란분과위원회/ 종계·부화분과위원회/ 육계분과위원회/ 홈페이지 새롭게 단장/ 본회 감사패 수상/ 육계자조금대표자회의

• Monthly Korean Chicken
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• v.1 no.6 s.6
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• pp.2-4
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• 1995

'3저 1고' 백색육 닭고기 홍보행사 - 일본, 중국의 냉장 닭고기 수입 증가세 - 브라질, 계육소비 증가 - 인도네시아, 축산업 $90{\%}$가 양계업 - 콜리스틴 설파제 장살모넬라 구제 실험 - 덴마크, 살모넬라 대책으로 육계업 울상 - 종계입식 증가세 - 양계장 출입차량 소독관리 점검 - 96 아틀란타 양계 박람회 개최

• KOREAN POULTRY JOURNAL
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• v.10 no.8 s.106
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• pp.71-72
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• 1978

여름철 가장 주의해야할 질병 중의 하나가 곰팡이병 이다. 특히 주의해야하는 것은 이 곰팡이병이 주로 사료로부터 오염, 중독된다는 사실이다. 부로일러의 증체지연 산란계의 산란율감소, 종계의 부화율 감소현상이 나타날 때 지체없이 자신이 쓰고 있는 사료를 유의해서 투시하자.

• KOREAN POULTRY JOURNAL
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• v.53 no.2
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• pp.108-111
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• 2021

육계산업의 성적에 가장 큰 영향을 미치는 것은 병아리다. 품질 좋은 병아리를 받아 사육하는 것이 생산성 향상의 가장 큰 요인 중에 하나다. 그리고 그 좋은 병아리를 제공하는 것이 종계부화업이다. 이에 본지는 깨끗한 병아리 생산을 위해 최첨단 부화장 시스템을 운영하고 있는 충남 보령의 보령축산을 찾았다.

• Journal of Sericultural and Entomological Science
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• v.24 no.2
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• pp.73-80
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• 1983

1. The varietal difference in amylase activity of the digestive fluid of the 5th instar larvae reared on the artificial diet was investigated, using the parent commercial silkworm varieties of Japanese strain. The amylase activity was large different among silkworm varieties. The activity was strong in Hansaeng-1, Jam 115 and Jam 117, medium in Hansaeng-3, Jam 113, Jam 119, and Jam 201, weak in Jam 107, Jam 121 and Gyeongchu. The amylase of the digestive fluid of ten parent commercial silkworm varieties is possible-(ae) type, compared with ＋(＋$\^$ae/) type of Daizo. 2. To investigate the effect of a-amylase pre-treatment of the artificial diet, larvae were fed with the diet treated by a-amylase during 4th-5th instar periods. The blood sugar content and cocoon qualities were slightly higher in the experimental larvae than those in the control, while showing the slight less body weight, amylase activity and dietary efficient.

• Korean Journal of Poultry Science
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• v.30 no.2
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• pp.83-90
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• 2003

This study was conducted to determine the effects of stocking density on performance and physiological responses of egg-type breeder layers in cages. A total of 264 Hy-Line Brown egg-type breeder layers at the age of 32 weeks were divided into 4 groups with 3 replicates of 22 birds (20 females, 2 males) per replicate and assigned to four stocking density treatments with 22 birds per cage with different sizes (980, 735, 640 and 560 $\textrm{cm}^2$/bird). The birds were fed the same experimental diet ad libitum for 12 weeks, and laying performance, egg and eggshell qualities, fertility and hatchability were determined. At the end of the experimental period, 9 birds were selected in each treatment in order to measure the scores of plumage condition. Antibody titers to Newcastle disease and infectious bronchitis were also determined. No significant differences were observed in laying performances, eggshell strength, Haugh unit, fertility and hatchability among the treatments. In birds housed 640 $\textrm{cm}^2$ per bird, eggshell thickness were significantly lower (P<0.05) than those of the other groups from 7 to 12 weeks. There was no significant difference in antibody titers to Newcastle disease. In birds housed 980 $\textrm{cm}^2$ per bird, antibody titers to infectious bronchitis were significantly (P<0.05) higher than those of the other groups. With increase in the level of stocking density, the scores of plumage condition were also significantly decreased (P<0.01). This study demonstrated that moderate increment of stocking density did not resulted in reduction in laying-performances of egg-type breeder layers. However, it seemed that the higher stocking density might give more stress to the birds from physical stimuli and thus were harmful environment causing higher mortalities compared to the lower ones.

• Korean Journal of Poultry Science
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• v.49 no.4
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• pp.181-188
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• 2022

This study was conducted to investigate the effects of the metabolic energy levels of Korean native chicken breeder diets on laying performance, egg quality, fertility and hatchability. On the basis of dietary metabolic energy values (2,800, 2,700, and 2,650 kcal/kg), 168 twenty-week-old 'Woorimatdag' breeders (maternal line) were divided into three treatment groups (four replications per treatment with each replicate containing 14 birds) and reared until 32 weeks of age. We found that the body weight of hens increased with age, although there were no significant differences among treatments with respect to body weight or egg weight. Egg production ratio at 20-24 and 24-28 weeks of age tended to be low in birds fed the 2,700 and 2,650 kcal/kg diets, although the differences among treatments were none significant. Feed intakes was significantly decreased as the metabolic energy level reduced (P<0.05). There were no significant differences among treatments with respect to feed conversion ratio or the strength and thickness of eggshell. Similarly, we detected no significant differences among the three metabolic energy levels with regards to fertility, hatchability, or chick weight. In conclusion, our findings indicate that during the initial phase of laying, the metabolic energy level of 'Woorimatdag' breeder diets could be lowered to 2,700 kcal/kg without significantly influencing the laying performance of breeders or egg quality, fertility and hatchability, and chick weight.