Protein Energy Relationships as Affected by Sex and Management

REVIEW OF LITERATURE DURING the past ten years a great amount of interest in the high energy ration has developed in the field of poultry nutrition. It has been shown repeatedly that increasing the energy of a ration results in a reduced feed intake per unit of body weight gain. Body weight gains and feather development have also been improved at times by increasing the energy level of the ration. Since it has been shown that chickens on high energy rations eat less feed per day and gain more weight per unit of feed, considerable doubt has arisen concerning the presently recommended nutrient levels (National Research Council, 1954). This has led to a general increase in the essential nutrients of the ration without adequate research to substantiate such practices in most cases. Much interest has been shown concerning the effect of energy on protein requirements, however. The general concensus of . . .