1. Abdollah, A.G., R.H. Harms and O. Husseiny. 1993. Performance of laying hens eggs heavy or light shell weight when feed diets with different calcium and phosphorous. Poultry Science, 4(72): 1881-1891. [
DOI:10.3382/ps.0721881]
2. AOAC. 1990. Official Methods of Analysis. Vol. 1, 15th ed. Association of Official Analytical Chemists, Arlington, VA, 771 pp.
3. Bishop, S.C., R.H. Fleming, H.A. McCormack, D.K. Flock and C.C. Whitehead. 2000. Inheritance of bone characteristics affecting osteoporosis in laying hens. British Poultry Science, 6(41): 33-40. [
DOI:10.1080/00071660086376]
4. Bolden, S.L and L.S. Jensen. 1985. Effect of dietary calcium level and ingredient composition on plasma calcium and shell quality in laying hens. Poultry Science, 7(64): 1499-1505. [
DOI:10.3382/ps.0641499]
5. Bolukbasi, S.C., S. Celebi and N. Utlu. 2005. The effects of calcium and vitamin D 3 in diet on plasma calcium and phosphorus, eggshell calcium and phosphorus levels of laying hens in late laying production period. International Journal of Poultry Science, 4: 246-247. [
DOI:10.3923/ijps.2005.600.603]
6. Castillo, C., M. Cuca, A. Pro, M. Gonza'lez and E. Morales. 2004. Biological and economic optimum level of calcium in White leghorn laying hens. Poultry Science, 83: 868-872. [
DOI:10.1093/ps/83.6.868]
7. Delhanty, J and J. B. Solomon. 1966. The nature of antibodies to goat erythrocytes in the developing chicken. Journal of Immunology, 11: 103-113.
8. Farmer, M., D.A. Roland and J. Clark. 1986. Influence of time of calcium intake on bone and dietary calcium utilization. Poultry Science, 65: 555-558. [
DOI:10.3382/ps.0650555]
9. Gongruttananun, N. 2010. Effects of eggshell calcium on productive performance, plasma calcium, bone mineralization, and gonadal characteristics in laying hens. Poultry Science, 90(2): 524-529. [
DOI:10.3382/ps.2010-01003]
10. Härtel, H. 1990. Evaluation of the dietary interaction of calcium and phosphorus in the high producing laying hen. British Poultry Science, 31: 473-494. [
DOI:10.1080/00071669008417280]
11. Hesabi, N., A. Shoorideh, R. Mirzaee and A. Ardalandoost. 2011. Effect of different levels of methionine on performance of Khorasan station native hens at diggrent production stages. Iranian Journal of Animal Science Research, 3(3): 229-235 (In Persian).
12. HesabiNamqi, A.R. 2014. Investigation of the effect of different levels of calcium and phosphorus on the performance of native chickens of Khorasan native chicken station in different stages of production. Final report of the research project. National Animal Science Research Institute. Approved project number: 89042-13-43-4.
13. Holick, M.F. 1981. The cutaneous photosynthesis of previtamin D3: A unique photoendocrine system. Journal of Investigative Dermatology, 76: 51-58. [
DOI:10.1111/1523-1747.ep12479237]
14. Isakov, N., M. Feldmann and S. Segel. 2005. The mechanism of modulation of humoral immuno responses after injection of mice with SRBC. Journal of Immunology, 128: 969-975. [
DOI:10.4049/jimmunol.128.2.969]
15. Keshavarz, K. and S. Nakajima. 1995. The effect of dietary manipulation of energy, protein, and fat during the growing and laying periods on early egg weight and egg components. Poultry Science, 74: 50-61. [
DOI:10.3382/ps.0740050]
16. Keshavarz, K. 1987. Interaction between calcium and phosphorus in laying hens. Nutrition Reports International, 36: 9-20.
17. Long, P.H., S.R. Lee, G.N. Rowland and W.M. Britton. 1984. Experimental rickets in broilers: Gross, microscopic, and radiographic lesions. II. Calcium deficiency. Avian disease, 28: 921-932. [
DOI:10.2307/1590268]
18. Mikaelian, K.S. and J.L. Sell. 1981. Performance of laying hens fed various phosphorus levels continuously of phase fed decremental phos-phorus levels. Poultry Science, 60: 1916-1924. [
DOI:10.3382/ps.0601916]
19. National Reasearch Council. 1994. Nutrient Requirements of poultry. 8th vertion. Edition Nationl Academy of science washington, DC, 173 pp.
20. Pakdel, M., J. Pourreza and S. Ansari. 2003. The effect of different amounts of available calcium and phosphorus on the performance of native chickens in Isfahan. Journal of Agricultural Science and Technology, 163-171.
21. Rao, S.R., M.V. Raju, M.R. Reddy and P. Pavani. 2000. Interaction between dietary calcium and non-phytate phosphorus levels on growth, bone mineralization and mineral excretion in commercial broilers. Animal Feed Science Technology, 131: 135-150. [
DOI:10.1016/j.anifeedsci.2006.02.011]
22. Rath, N.C., G.R. Huff, W.E. Huff and J.M. Balog. 2000. Factors regulating bone maturity and strength in poultry. Poultry Science. 79: 1024-1032. [
DOI:10.1093/ps/79.7.1024]
23. Said, N.W. and T.W. Sullivan. 1985. A comparison of continuous and phased levels o f dietary phosphorus for commercial laying hens. Poultry Science. 64: 1763-1771. [
DOI:10.3382/ps.0641763]
24. Sell, J.L., S.E. Scheideler and B.E. Rahn. 1987. Influence of different phosphorus phase-feeding programs and dietary calcium level o n performance and body phosphorus o f laying hens. Poultry Science, 66: 1524-1530. [
DOI:10.3382/ps.0661524]
25. Sheikhlar, A., A.B. Kasim and M.H. Bejo. 2009. Effect of varying ratios of dietary calcium and phosphorus on performance, phytate P and mineral retention in Japanese quail (Coturnix cotnurnix Japonica). International Journal of Poultry Science, 8(7): 692-695. [
DOI:10.3923/ijps.2009.692.695]
26. Stadelman, W.J. 2000. "Eggs and egg products," in Encyclopedia of Food Science and Technology, 2nd Edn, ed. F.J. Francis (New York, NY: John Wiley and Sons).
27. Veum, T.L., D.M.S.S. Vitti and E. Kebreab. 2010. "Phosphorus and calcium nutrition and metabolism," in Phosphorus and Calcium Utilization and Requirements in Farm Animals, eds D.M.S.S. Vitti and E. Kebreab (Wallingford: CAB International), 94: 111. [
DOI:10.1079/9781845936266.0094]
28. Whitehead, C.C. and R.H. Fleming. 2000. Osteoporosis in cage layers. Poultry Science, 79: 1033-1041. [
DOI:10.1093/ps/79.7.1033]