The Phosphorus Requirement of Young Chicks and Poults—A Review

Effect of Phosphorus, Vitamin E and Environment on Growth and the Incidence of Perosis in Turkeys

“…For optimum feed efficiency there appeared to be little need to go beyond 0.5 percent inorganic phosphorus. These results would tend to confirm the conclusion reached by Almquist (1954), based upon his own work and a review of the literature, that the readilyavailable phosphorus requirement of the young poult is approximately 0.6 percent. Supplementing the diets with vitamin E had little or no effect on weight or feed efficiency at 8 weeks of age.…”

The Relationship of Calcium-Phosphorus Ratios to the Utilization of Plant and Inorganic Phosphorus by the Chick

“…Briggs et al (1944) reported that ascorbic acid fed to chicks receiving various purified diets promoted small but consistent increases in growth rate. Almquist (1954) suggested that the phosphorus requirement of chicks from one day to four weeks of age was 0.45% from a readily available source. March and Biely (1953) reported a growth stimulus from the addition of vitamin C to a diet of natural ingredients.…”

Availability of Phosphorus Supplements for Chicks

“…While it is recognized that the phosphorus requirement decreases with age (Almquist, 1954;O'Rourke et al, 1952O'Rourke et al, , 1955 these results indicate that colloidal phosphate can be used to supply part of the supplemental phosphorus in chick rations. The results also lend support to our previous suggestion that the phosphorus requirement for growth is different from that for bone calcification, or that the metabolism of phosphorus for these functions is different.…”