Studies on the Nutritional Requirements of Poults

A Comparison of Phosphorus Assay Techniques with Chicks

“…These data indicate that plant phosphorus might be available for growth but not adequate for optimum mineralization. Fritz et al (1947), Vandepopuliere et al (1961), and Waldroup et al (1965) reported similar findings.…”

The Phosphorus Requirement of Young Chicks and Poults—A Review

“…The studies by Fritz et al (1947) indicated that Bronze turkeys showed good early growth and calcification on diets containing 0.6 inorganic P and 160 vitamin D from fish liver oil sources. There were indications that some cereal P had been utilized, but no means of differentiating this as to phytin origin.…”

Methionine and Lysine in Rations for Turkey Poults Under Various Dietary Conditions

“…In 1950, the NRC increased the suggested requirement to 28%. Fritz, Halpin and Hooper (1947) reported that protein levels above 26% were required for maximum early poult growth. Scott, Heuser and Norris (1948) demonstrated that 24% protein was adequate with a low energy ration, whereas 28-30% protein was required when a ration higher in energy was employed.…”