Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Estimate of laying performance of two crossbred Korean native chickens in 20 to 40 weeks

  • Hong, Jun Seon (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Cho, Hyun Min (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Wickramasuriya, Samiru Sudharaka (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Kim, Yu Bin (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Heo, Jung Min (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Yi, Yong-Joo (Division of Biotechnology, Safety Environment and Life Science Institute, Chonbuk National University)
  • Received : 2019.10.17
  • Accepted : 2019.11.07
  • Published : 2019.12.31
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Abstract

This study was conducted to investigate the laying period performance of two crossbred Korean native chicken (KNC) grand parent stock (GPS) layer during 20 to 40 weeks. A total of 351 20-week-old KNC GPS were allocated in a completely randomized design to give 4 birds per each cage. The chickens were fed commercial diets [i.e., week 20 - 32, crude protein (CP) 18.0% and metabolizable energy (ME) 2,850 kcal/kg; week 32 - 40, CP 17.0% and ME 2,800 kcal/kg)] and fresh water during the whole experiment period ad libitum basis. Body weight, age of sexual maturity, egg weight, hen-day egg production (HDP) and feed conversion ratio (FCR) were measured during the experiment period (week 20 - 40). The results show no significant difference in the Body weight, age of sexual maturity, egg weight, and hen-day egg production (HDP) except for egg weight. 1B had a higher egg weight on week 36 only. We expect that the reason why most factors showed no significant difference is the lack of nutrients caused by limited feeding which follows the standard feeding system for the grand-parent stock. These results provide basic information for laying data in 2-way crossbred Korean native chickens.

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References

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