Australian researchers determined the energy values for three feed ingredients for laying hens. Most available tabulated data for energy are from experiments using adult cockerels or growing broilers. This research study determined the energy values of corn, soybean meal and wheat using mature layers. In the study forty-42-wk-old Hy-Line Brown hens were used, two birds per cage with six replicates per diet. Thirty-percent of the reference diet was the test ingredient.
Values for gross energy (GE), apparent metabolizable energy (AME) and apparent metabolizable energy corrected to zero nitrogen retention (AMEn) for these three feed ingredients were:
In an earlier experiment, Chinese researchers determined the metabolizable and net energy of regular and dehulled soybean meal. In a broiler study, 25% of the basal diet was replaced with the soybean meals. The study involved an adaption period of 7-days and an excretion collection period of 10 days. Results included: