Effects of Dietary Calcium Levels on Productive Performance, Eggshell Quality and Overall Calcium Status in Aged Laying Hens
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초록
This study was conducted to investigate the effects of diets with varying levels of calcium on egg production, shell quality and overall calcium status in aged laying hens. A total of five hundred 70-wk-old Hy-Line Brown layers were divided five groups and fed one of the five experimental diets with 3.5%, 3.8%, 4.1%, 4.4%, or 4.7% Ca, for 10 weeks. There were no significant differences in feed intake, egg production and egg weight among groups. The cracked eggs were linearly reduced as dietary Ca levels increased to 4.7% (p<0.01). A significant linear improvement for eggshell strength and thickness were determined with increasing dietary Ca levels (p<0.01). The contents of serum Ca and phosphorus were not affected by dietary Ca levels. With increase in dietary Ca levels, the tibial breaking strength slightly increased. There were no significant differences in the tibial contents of ash, Ca and phosphorus among groups. In conclusion, eggshell quality, as measured by appearance, strength and thickness of eggshell, were influenced by dietary Ca content as expected (p<0.05). These results suggested that aged laying hens require relatively higher level of Ca than required levels from current Korean feeding standards for poultry.
Abstract
This study was conducted to investigate the effects of diets with varying levels of calcium on egg production, shell quality and overall calcium status in aged laying hens. A total of five hundred 70-wk-old Hy-Line Brown layers were divided five groups and fed one of the five experimental diets with 3.5%, 3.8%, 4.1%, 4.4%, or 4.7% Ca, for 10 weeks. There were no significant differences in feed intake, egg production and egg weight among groups. The cracked eggs were linearly reduced as dietary Ca levels increased to 4.7% (p<0.01). A significant linear improvement for eggshell strength and thickness were determined with increasing dietary Ca levels (p<0.01). The contents of serum Ca and phosphorus were not affected by dietary Ca levels. With increase in dietary Ca levels, the tibial breaking strength slightly increased. There were no significant differences in the tibial contents of ash, Ca and phosphorus among groups. In conclusion, eggshell quality, as measured by appearance, strength and thickness of eggshell, were influenced by dietary Ca content as expected (p<0.05). These results suggested that aged laying hens require relatively higher level of Ca than required levels from current Korean feeding standards for poultry.
참고문헌 (29)
- Ahmed, N. M, "Effect of dietary calcium sources on laying hens performance and egg quality", J. Anim. Prod. Adv, 3, pp.226~231 (2013)
- Al-Batshan, H. A., "Duodenal calcium uptake, femur ash and eggshell quality decline with age and increase following molt", Poult. Sci, 73, pp.1590~1596 (1994)
- Byoung Ki An, "Effects of Dietary Skullcap (Scutellaria baicalensis) Extract on Laying Performance and Lipid Oxidation of Chicken Eggs", ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, 23(6), pp.772~776 (2010), 아세아·태평양축산학회
- Association of Official Analytical Chemists, "International. 1995. Official Methods of Analysis of AOAC International", AOAC International, ~ (1995)
- Castillo, C., "Biological and economic optimum level of calcium in White Leghorn laying hens", Poult. Sci, 83, pp.868~872 (2004)
- Chandramoni, "Effect of dietary calcium and phosphorus concentrations on retention of these nutrients by caged layers", Br. Poult. Sci, 39, pp.544~548 (1998)
- Cufadar, Y., "The effect of dietary calcium concentration and particle size on performance, eggshell quality, bone mechanical properties and tibia mineral contents in moulted laying hens", Br. Poult. Sci, 52, pp.761~768 (2011)
- Elaroussi, M. A., "Calcium homeostasis in the laying hen. 1. Age and dietary calcium effects", Poult. Sci, 73, pp.1581~1589 (1994)
- Frost, T. J., "The influence of various calcium, and phosphorus levels on tibia strength, and eggshell quality of pullets during peak production", Poult. Sci, 70, pp.963~969 (1991)
- Garlich, J., "Physiological profile of caged layers during one production year, molt and postmolt: Egg production, eggshell quality, liver, femur, blood parameters", Poult. Sci, 63, pp.339~343 (1984)
- Haugh, R. R., "The Haugh unit for measuring egg quality", US Egg Poult. Mag, 43, pp.552~573 (1937)
- Jiang, S, "Effects of dietary energy and calcium levels on performance, egg shell quality and bone metabolism in hens", Vet. J, 198, pp.252~258 (2013)
- Keshavarz, K., "Re-evaluation of calcium and phosphorus requirements of laying hens for optimum performance and eggshell quality", Poult. Sci, 72, pp.144~153 (1993)
- Korean Feeding Standard for Poultry, "Nutrient Requirement of Poultry", National Institute of Animal Science, ~ (2012)
- Koutoulis, K. C., "Effect of different calcium sources and calcium intake on shell quality and bone characteristics of laying hens at sexual maturity and end of lay", Int. J. Poult. Sci, 8, pp.342~348 (2009)
- Leeson, S., "Response of brown-egg strain layers to dietary calcium or phosphorus", Poult. Sci, 72, pp.1510~1514 (1993)
- Narvaez-Solarte, W., "Nutritional requirement of calcium in white laying hens from 46 to 62 wk of age", Int. J. Poult. Sci, 5, pp.181~184 (2006)
- National Research Council, "Nutrient Requirements of Poultry" (1994), National Academy Press
- Olver, M. D., "The effect of choice-feeding from 7 weeks of age on the production characteristics of laying hens", S. Afr. J. Anim. Sci, 30, pp.110~114 (2000)
- Ousterhout, L. E., "Effect of calcium and phosphorus levels on egg weight and eggshell quality in laying hens", Poult. Sci, 59, pp.1480~1484 (1980)
- The Effect of Dietary Available Phosphorus and Phytase Level on Long-term Performance of Laying Hens, "Parsons, C. M", BASF Corp., 24~33 (1999)
- Pelicia, K., "Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle", Rev. Bras. Cienc. Avic, 11, pp.87~94 (2009)
- Punna, S, "Influence of supplemental microbial phytase on first cycle laying hens fed phosphorusdeficient diets from day one of age", Poult. Sci, 78, pp.1407~1411 (1999)
- Robbins, K. R., "Estimation of nutrient requirements using broken-line regression analysis", J. Anim. Sci, 84, pp.E155~E165 (2006)
- Roberts, J. R, "Factors affecting egg internal quality and eggshell quality in laying hens", J. Poult. Sci, 41, pp.161~177 (2004)
- Roland, Sr., D. A., "Calcium and other factors involved in maintaining eggshell quality in commercial Leghorns", Proceedings of the Arkansas Nutrition Conference, pp.96~100 (1987)
- Roland, Sr., D. A., "Research note: Egg shell problems: Estimates of incidence and economic impact", Poult. Sci, 67, pp.1801~1803 (1988)
- Roland, Sr., D. A., "Influence of calcium and environmental temperature on performance of first cycle (Phase 1) commercial leghorns", Poult. Sci, 75, pp.62~68 (1996)
- Safaa, H. M., "Productive performance and egg quality of brown egg-laying hens in the late phase of production as influenced by level and source of calcium in the diet", Poult. Sci, 87, pp.2043~2051 (2008)