THE EFFECT OF HIGH DIETARY LEVELS OF PHOSPHORUS ON THE PERFORMANCE OF LAYING HENS
Article Sidebar
Main Article Content
Abstract
One hundred and twenty Hisex Brown commercial layers at the age of 40 weeks were divided into 3 groups each was subdivided into 4 replicants. Each group was given one of three diets contained either 0.54, 1.04 or 1.54% available phosphorus and 3.0% calcium for one month. Egg production was recorded, and eggs and shells were weighed. Group 2 produced more egg (12.18 egg/day) than group 1 (9.31 egg/day) and group 3 (9.3 egg/day). Groups received higher percentage of available phosphorus in their diets produced heavier eggs (65.14, 67.67 and 68.28 g/egg respectively). Egg shell weight was increased accordingly when available phosphorus in the diet was raised (7.88, 8.85 and 9.0 g/egg respectively). It was concluded that the available phosphorus in the diets contained 3.0% calcium cam be increased from 0.5% to 1.0% with beneficial results on egg production and egg weight
Downloads
Article Details
How to Cite
References
Dagnelle, P. (1973). Theorie et methodes statistiques. Applications agronomiques. Vol 1, Pp. 378, Lea preaser agronomique de Gembloux, Belgique.
Ewing, W.R. (1963). Poultry Nutrition, 5th Ed. The Ray Ewing Company, Publisher Division of Hoffmann-La Roche Inc., Pasadena, California.
Garlich, J.D., James, R.L. and Ward, J.B. (1975). Effects of short term phosphorus deprivation on laying hens. Poultry Sci. 54: 1193-1199.
Garlich, J.D. and Parkhurst, C.R. (1976). Phosphorus for laying hens. Feedstuffs 48: 37.
Hunt, J.R. and Chancey, W.R. (1970). Influence of dietary phosphorus on shell quality. Brit. Poultry Sci. 11: 259-267.
National Research Council, National Academy of Sciences, Washington, D.C. (1971). Nutrient Requirements of Domestic Animals. 1. Nutrient Requirements of Poultry. 6th revised edition.
Pepper, W.F., Slinger, S.J., Summers, J.D. and Ashton,G.C. (1959). Qn the phosphorus requirements of chickens for egg production and hatchability. Can.J. Anim. Sci. 39: 182-192.yoy
Pepper, W.F., Summers, J.D., Moran, E.T. and Bayley, H.S. (1969). The influence of steam pelleting on the utilization of phosphorus by the laying hen. Poultry Sci. 48: 1055-1060.
Ridgman. W.J. (1975). Experimentation in Biology. ist Bd.Blackie and son ltd, Glasgow, London.
Summers, J.D., Grandhi, R. and Lesson, S. (1976). Calcium and phosphorus requirements of the laying hens. Poultry Sci. 55: 402-413.
Vohra, P., Kratzer, F.H. and Norris, L.C. (1974). Phosphorus levels for poultry feed. Feedstuffs 46:44-45.
Waldroup, P.W., Simpson, C.F., Damron, B.L. and Harms, R.H. (1967). The effectiveness of plant and inorganic phosphorus in supporting egg production in hens and hatchability and bone development in chick embryo. Poultry Sci. 46: 659-664.
Wasserman, R.H. (1975). Metabolism, function, and clinical aspect of vitamin D. Cornell Vet. 65: 3-25.