Calcium, Phosphorus, and Vitamin D Interrelationships in Turkey Poult Nutrition

The Phosphorus Requirement of Young Chicks and Poults—A Review

“…Data reported in the case of both irradiated products used fall close to the same straight line on a plot of bone ash versus log. Evans and Brant (1945) studied the interrelation of Ca, P, and vitamin D in turkey poults. The cod liver oil data fall on another nearly parallel line which is displaced by approximately log.…”

The Fat-Soluble Vitamins in Poultry Nutrition

“…Bird (1943) have all presented evidence that chicks can be raised to at least 12 weeks of age without vitamin D, provided the calcium and phosphorus content of the diet is high and the Ca: P ratio favourable. A reduced requirement of turkey poults for vitamin D has been reported (Mussehl & Ackerson, 1935;Evans & Brant, 1945), with high dietary levels of calcium and phosphorus. There have been reports by Bird (1944) and Boucher (1944) that irradiated animal sterols are more effective than cod-liver oil for promoting calcification in turkey poults when compared on an equal A.O.A.C.…”

Response of Turkey Poults to Vitamin D from Different Sources

“…chick units of vitamin D per 100 grams of diet, from all sources studied gave satisfactory calcification in the poult. Evans and Brant (1945) obtained satisfactory calcification in turkeys at eight weeks with 50 A.O.A.C. chick units of vitamin D from a fish oil blend by increasing the calcium in the diet to 1.8 or 3.0% with the Ca:P ratio being 3:1.…”