Factors influencing malformation of the leg bones of growing chicks

Abstract

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Inorganic Phosphorus and Perosis

“…The significant negative correlation found between perosis and organic phosphorus helps to explain why the correlation coefficient between perosis and phosphorus in this study, and that reported by Milby (1933) between slipped tendon and phosphorus leave so much variation unaccounted for.…”

“…Titus (1932) concluded that rice bran contains a factor which is necessary for the normal development of bone in the case of the chicken. Milby (1933) found high correlation between slipped tendon and total phosphorus content of the diet. Insko, Sowell and Lyons (1934) reported that widening the Ca:P ratio with its accompanying increase of calcium in the diet from 0.4:1 to 3.1:1 did not increase the percentage of slipped tendon.…”

“…Serfontein and Payne (1934) believe the tendency toward crooked legs is inherited. Milby (1934) concluded that phosphorus appears to be the chief causative factor in the production of slipped tendon.…”

“…The author was experimenting with varied amounts of organic and inorganic phosphorus in chick diets when the analysis of slipped tendon data by Milby (1933) was published. It seems that the true significance of organic and inorganic phosphorus in the etiology of perosis could best be shown by extending the method employed by Milby to include them.…”

A Method for Determining the Ash Content of the Leg Bones of Chicks With Slipped Tendon

“…These results have been discussed by Milby (1934). SUMMARY It is clear that there is no significant difference in the ash content of femurs, tibiae, or metatarsi of chicks on various rations which are afflicted with slipped tendon and the ash content of the corresponding bones of chicks on a control ration at the same age.…”