The Quantity of Animal Protein Required to Supplement Soybean Oil Meal for Growth

Abstract

RESEARCH findings, recently summarized by Almquist (1943), have demonstrated that proteins of animal sources should constitute between 5 and 10 percent of the total protein in practical all-mash starting rations for chickens in which soybean oil meal is the chief protein supplement. Most of the evidence cited was obtained with animal protein derived in part or entirely from fish and milk sources. Since these supplements are exceedingly difficult to obtain in the interior of the country, more exact data was needed on rations utilizing meat and bone scrap as the chief animal protein carrier. To furnish these data a series of growth trials was conducted in the winter and spring of 1943.EXPERIMENTAL PROCEDUREDay-old chicks of either the Single Comb White Leghorn or New Hampshire breed were distributed into the pens, assuring equal distribution according to condition and to pens from which they were hatched. In all but the .