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The Relation of Calcium and Phosphorus to Growth and Rachitic Leg Weakness in Chickens

Published online by Cambridge University Press:  27 March 2009

Raymond T. Parkhurst  and
Mary R. McMurray
Raymond T. Parkhurst
Affiliation:
(The National Institute of Poultry Husbandry, Harper-Adams Agricultural College, Newport, Salop.)
Mary R. McMurray
Affiliation:
(The National Institute of Poultry Husbandry, Harper-Adams Agricultural College, Newport, Salop.)
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Extract

Retarded growth and poor bone development resulted from feeding both a ration containing only 0·26 per cent. calcium and with a Ca:P ratio of 0·44:1 and from a ration in which 5 per cent, of maize meal had been replaced by 5 per cent, of ground limestone to give a calcium content of 3 per cent. and a Ca:P ratio of 4:1. The basal or No Limestone group confirms previous results indicating that ground limestone may have a depressing effect on growth.

The authors wish to acknowledge the assistance of Mr G. H. Botham, B.Sc, A.L.S., who did the chemical analysis of the food and bones, Mr J. Lavelle, who made and interpreted the skiagrams, and Mr F. J. Dudley, who statistically analysed the results.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 22 , Issue 4 , October 1932 , pp. 874 - 882
Copyright
Copyright © Cambridge University Press 1932

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