Nutrition

Extract

The vitamin A requirements of the laying pullet. W. C. Russell, C. S. Platt, M.W. Taylor, and D. F. Chichester. New Jersey Stas. Circ. 369, 1936.

In the experiments herein reported seven pens of healthy pullets reared on range were started on experiment late in August and continued under confinement for a 12-mo. period. All lots received essentially the same basal ration, but the proportions of yellow corn and white corn and the supplements of alfalfa meal, vitamin A concentrate, and fresh green feed were varied so that the U. S. P. units of vitamin A per pound of feed were 400, 700, 1,300, 2,200, 3,800, 4,100, and 30,000 for lots 1 to 7, respectively. Data are reported on the percentage mortality, live weight changes, egg production, hatchability of eggs, mortality of chicks during the first 2 weeks of life, and vitamin A storage in the livers of the hens.