• Title/Summary/Keyword: 우성산업

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세계IT산업 방향과 우리나라 IT수출

  • Lee, U-Seong
    • Photonics industry news
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    • s.12
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    • pp.38-43
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    • 2002

  • 전세계적인 IT불황에도 불구하고 우리나라 IT수출이 회복세를 보이고 있는 것은 중국 IT산업의 급성장이 크게 기여하였다. 그러나 우리의 최대수요처인 미국의 IT투자가 살아나지 않는 한 이 같은 회복세는 제한적일 수밖에 없을 것이다.

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Effects of Early- and Late-Feathering Phenotypes on Growth Performance and Mortality in Korean Native Commercial Chickens (토종 실용닭의 깃털 조만성 형태가 산육능력 및 생존율에 미치는 영향)

  • Sohn, Sea Hwan;Choi, Eun Sik;Cho, Eun Jung;Kim, Bo Gyeong
    • Korean Journal of Poultry Science
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    • v.48 no.4
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    • pp.177-184
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    • 2021

  • Sex identification in day-old chicks is essential in the poultry industry. Currently, the feather-sexing using a sex-linked inheritance is a chick sexing method used extensively in the poultry industry. For chicks produced by feather-sexing, all females are early-feathering (EF) chicks and all males are late-feathering (LF) chicks. Therefore, investigating the effects of EF and LF phenotypes on production traits of chickens is critical. The purpose of this study was to analyze and compare the production performance between EF and LF chickens in Korean native commercial chickens. The results showed that the survival rate of the EF chickens was significantly higher than that of the LF chickens, from hatching to 12 weeks of age (P<0.05), with the highest difference observed in females. However, no significant difference was observed in body weight between the EF and LF chickens at almost all ages. In addition, no significant difference was observed between in feed utility, such as average daily feed intake and feed conversion ratio, between the EF and LF groups. In conclusion, although the survival rate of early-feathering chickens was superior to that of late-feathering chickens, no significant difference was observed in growth performance and feed utility among Korean native chickens. The results suggest that production capacity is not influenced by feathering type in the establishment of a breeder structure and production system for feather-sexing Korean native chickens, which is valuable for the practical application of feather-sexing in the poultry industry.

  • https://doi.org/10.5536/KJPS.2021.48.4.177 인용 PDF KSCI HTML