Production performance and egg quality of Hy-line W36 laying hens fed reduced-protein diets at a constant total sulfur amino Acid: Lysine ratio
- Author
- F. Khajali, E. A. Khoshouie, Saeid Karimi Dehkordi (UGent) and M. Hematian
- Organization
- Abstract
- Two hundred eight 20-wk-old Hy-Line W36 hens at a 5% production rate were assigned to 2 dietary treatments varying in CP content. Each treatment consisted of 13 replicates of 8 liens. Dietary CP levels of the control diet were 17.8, 1 9.9 18.5, and 15.5% during the periods of 1) a 5 to 50% production rate, 2) a 50% production rate until mo 7, 3) mo 8 to 10 of the production cycle, and 4) mo 10 to 12 of the production cycle, respectively. The respective CP levels of the reduced-CP diet fed during these phases were 16.3, 18.4, 17.0, and 13.9%. The reduced-CP diets had dietary CP levels approximately 1.5 percentage units lower than their control counterparts. Dietary treatments met the minimal requirements for amino acids recommended by NRC (1994). Hen-day egg production, egg mass, and FCR were maintained well on the low-protein diet during the first 8 mo of production but tended to be impaired thereafter. In mo 10 and I I of the laying period, egg mass was significantly (P < 0.05) reduced and FCR was significantly (P < 0.05) impaired on the reduced-CP diet compared with the control diet. Egg weight. eggshell thickness, eggshell breaking strength, and albumen height were not significantly affected by feeding the redUced-CP diet. III Conclusion, layer performance can remain satisfactory on reduced-CP diets for short periods, but long-term feeding of reduced-CP diets may not be advisable able because it will reduce performance in the late stage of production.
- Keywords
- egg quality, laying hen, ENERGY, PHOSPHORUS, SUPPLEMENTATION, performance, protein, NITROGEN, CRUDE PROTEIN, W-36 HENS
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-746407
- MLA
- Khajali, F., et al. “Production Performance and Egg Quality of Hy-Line W36 Laying Hens Fed Reduced-Protein Diets at a Constant Total Sulfur Amino Acid: Lysine Ratio.” JOURNAL OF APPLIED POULTRY RESEARCH, vol. 17, no. 3, 2008, pp. 390–97, doi:10.3382/japr.2008-00002.
- APA
- Khajali, F., Khoshouie, E. A., Karimi Dehkordi, S., & Hematian, M. (2008). Production performance and egg quality of Hy-line W36 laying hens fed reduced-protein diets at a constant total sulfur amino Acid: Lysine ratio. JOURNAL OF APPLIED POULTRY RESEARCH, 17(3), 390–397. https://doi.org/10.3382/japr.2008-00002
- Chicago author-date
- Khajali, F., E. A. Khoshouie, Saeid Karimi Dehkordi, and M. Hematian. 2008. “Production Performance and Egg Quality of Hy-Line W36 Laying Hens Fed Reduced-Protein Diets at a Constant Total Sulfur Amino Acid: Lysine Ratio.” JOURNAL OF APPLIED POULTRY RESEARCH 17 (3): 390–97. https://doi.org/10.3382/japr.2008-00002.
- Chicago author-date (all authors)
- Khajali, F., E. A. Khoshouie, Saeid Karimi Dehkordi, and M. Hematian. 2008. “Production Performance and Egg Quality of Hy-Line W36 Laying Hens Fed Reduced-Protein Diets at a Constant Total Sulfur Amino Acid: Lysine Ratio.” JOURNAL OF APPLIED POULTRY RESEARCH 17 (3): 390–397. doi:10.3382/japr.2008-00002.
- Vancouver
- 1.Khajali F, Khoshouie EA, Karimi Dehkordi S, Hematian M. Production performance and egg quality of Hy-line W36 laying hens fed reduced-protein diets at a constant total sulfur amino Acid: Lysine ratio. JOURNAL OF APPLIED POULTRY RESEARCH. 2008;17(3):390–7.
- IEEE
- [1]F. Khajali, E. A. Khoshouie, S. Karimi Dehkordi, and M. Hematian, “Production performance and egg quality of Hy-line W36 laying hens fed reduced-protein diets at a constant total sulfur amino Acid: Lysine ratio,” JOURNAL OF APPLIED POULTRY RESEARCH, vol. 17, no. 3, pp. 390–397, 2008.
@article{746407,
abstract = {{Two hundred eight 20-wk-old Hy-Line W36 hens at a 5% production rate were assigned to 2 dietary treatments varying in CP content. Each treatment consisted of 13 replicates of 8 liens. Dietary CP levels of the control diet were 17.8, 1 9.9 18.5, and 15.5% during the periods of 1) a 5 to 50% production rate, 2) a 50% production rate until mo 7, 3) mo 8 to 10 of the production cycle, and 4) mo 10 to 12 of the production cycle, respectively. The respective CP levels of the reduced-CP diet fed during these phases were 16.3, 18.4, 17.0, and 13.9%. The reduced-CP diets had dietary CP levels approximately 1.5 percentage units lower than their control counterparts. Dietary treatments met the minimal requirements for amino acids recommended by NRC (1994). Hen-day egg production, egg mass, and FCR were maintained well on the low-protein diet during the first 8 mo of production but tended to be impaired thereafter. In mo 10 and I I of the laying period, egg mass was significantly (P < 0.05) reduced and FCR was significantly (P < 0.05) impaired on the reduced-CP diet compared with the control diet. Egg weight. eggshell thickness, eggshell breaking strength, and albumen height were not significantly affected by feeding the redUced-CP diet. III Conclusion, layer performance can remain satisfactory on reduced-CP diets for short periods, but long-term feeding of reduced-CP diets may not be advisable able because it will reduce performance in the late stage of production.}},
author = {{Khajali, F. and Khoshouie, E. A. and Karimi Dehkordi, Saeid and Hematian, M.}},
issn = {{1056-6171}},
journal = {{JOURNAL OF APPLIED POULTRY RESEARCH}},
keywords = {{egg quality,laying hen,ENERGY,PHOSPHORUS,SUPPLEMENTATION,performance,protein,NITROGEN,CRUDE PROTEIN,W-36 HENS}},
language = {{eng}},
number = {{3}},
pages = {{390--397}},
title = {{Production performance and egg quality of Hy-line W36 laying hens fed reduced-protein diets at a constant total sulfur amino Acid: Lysine ratio}},
url = {{http://doi.org/10.3382/japr.2008-00002}},
volume = {{17}},
year = {{2008}},
}
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