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http://dx.doi.org/10.7744/kjoas.20180063

Comparison of the performance of the laying period of crossbred Korean native chickens from 20 to 40 weeks of age  

Cho, Hyun Min (Department of Animal Science and Biotechnology, Chungnam National University)
Wickramasuriya, Samiru Sudharaka (Department of Animal Science and Biotechnology, Chungnam National University)
Shin, Taeg Kyun (Department of Animal Science and Biotechnology, Chungnam National University)
Kim, Eunjoo (Department of Animal Science and Biotechnology, Chungnam National University)
Heo, Jung Min (Department of Animal Science and Biotechnology, Chungnam National University)
Yi, Young-Joo (Division of Biotechnology, Safety, Environment and Life Science Institute, Chonbuk National University)
Publication Information
Korean Journal of Agricultural Science / v.45, no.4, 2018 , pp. 687-694 More about this Journal
Abstract
This study was conducted to investigate the laying performance of six strains of Korean domestic chickens (KDC 1A, 2A, 3A, 1B, 2B and 3B). A total of 288 20-week-old KDC hens were allocated in a completely randomized design to give 12 replicates per each strain (4 chickens per pen). 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) ad libitum together with fresh water during the 20-week experiment. 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). Our results show that strain 3B had an improved (p < 0.05) HDP and FCR compared with the other strains on week 24 - 28. However, strain 3A had an improved (p < 0.05) HDP and FCR compared to the other strains on week 28 - 40. Similarly, strain 3A had a higher egg weight (p < 0.05) compared to the other strains on week 28, 32 and 40. In conclusion, the higher laying performance of strain 3A indicates its potential in the development of a KDC strain with improved commercial laying performance.
Keywords
age of sexual maturity; feed conversion ratio; hen-day egg production; Korean domestic chickens;
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Times Cited By KSCI : 2  (Citation Analysis)
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