QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Edwards, H. M. Articles by Veltmann, J. R. Search for Related Content PubMed PubMed Citation Articles by Edwards, H. M., Jr. Articles by Veltmann, J. R., Jr.

The Role of Calcium and Phosphorus in the Etiology of Tibial Dyschondroplasia in Young Chicks¹

Department of Poultry Science, University of Georgia, Athens, GA 30602

By means of a central composite rotatable design with dietary calcium levels of 0.63, 0.70, 1.10, 1.50 and 1.67% and total phosphorus levels of 0.53, 0.61, 0.81, 1.01 and 1.09%, practical-type rations were fed for 2 weeks to commercial broiler-type chickens. The design involved three replicates for each rotatable point and 15 replicates for the central point with 10 cockerels per replicate or a total of 390 birds. When the experiment was terminated, the chickens were weighed and killed; one tibia was used to determine bone ash and the other tibia for scoring the incidence and severity of tibial dyschondroplasia. The incidence of tibial dyschondroplasia in chickens fed the various diets ranged from 0 to 37%. A high incidence of tibial dyschondroplasia was associated with diets containing high phosphorus and low calcium levels. Tibial dyschondroplasia score and percentage of bone ash were not correlated. No obvious relationships existed between tibial dyschondroplasia incidence and percentage retention of calcium and phosphorus. A second experiment confirmed the finding that increased dietary calcium levels would reduce the incidence of tibial dyschondroplasia when chcikens were fed diets high in phosphorus.

KEY WORDS: • calcium • phosphorus • tibial dyschondroplasia • chickens

¹ Supported by State and Hatch funds allocated to the Georgia Agricultural Experiment Stations of the University of Georgia.

Manuscript received 15 November 1982.

This article has been cited by other articles:

				M. Y. Shim, G. M. Pesti, R. I. Bakalli, and H. M. Edwards Jr. The Effect of Breeder Age and Egg Storage Time on Phosphorus Utilization by Broiler Progeny Fed a Phosphorus Deficiency Diet with 1{alpha}-OH Vitamin D3 Poult. Sci., June 1, 2008; 87(6): 1138 - 1145. [Abstract] [Full Text] [PDF]

				S. Yalcin, H. B. Molayoglu, M. Baka, O. Genin, and M. Pines Effect of Temperature During the Incubation Period on Tibial Growth Plate Chondrocyte Differentiation and the Incidence of Tibial Dyschondroplasia Poult. Sci., August 1, 2007; 86(8): 1772 - 1783. [Abstract] [Full Text] [PDF]

				R. Angel Metabolic Disorders: Limitations to Growth of and Mineral Deposition into the Broiler Skeleton after Hatch and Potential Implications for Leg Problems J. Appl. Poult. Res., January 1, 2007; 16(1): 138 - 149. [Abstract] [Full Text] [PDF]

				J. P. Driver, G. M. Pesti, R. I. Bakalli, and H. M. Edwards Jr. The effect of feeding calcium- and phosphorus-deficient diets to broiler chickens during the starting and growing-finishing phases on carcass quality. Poult. Sci., November 1, 2006; 85(11): 1939 - 1946. [Abstract] [Full Text] [PDF]

				C. A. Fritts and P. W. Waldroup Modified Phosphorus Program for Broilers Based on Commercial Feeding Intervals to Sustain Live Performance and Reduce Total and Water-Soluble Phosphorus in Litter J. Appl. Poult. Res., January 1, 2006; 15(2): 207 - 218. [Abstract] [Full Text] [PDF]