The objective of this trial was to determine the energy value of oat, barley, cassava residue and linseed grain (whole and milled) for Japanese quails (Coturnix coturnix japonica). Three hundred and sixty 40-d male quails were assigned to a completely randomized design with six treatments (reference diet + five feedstuffs), six replications and ten birds per pen. The total feces collection was the used methodology. The feedstuffs evaluated were used at a level of 20% replacing the energy source of the reference diet (RD) that was based on corn and soybean meal. The gross energy metabolization coefficient (GEMC) of oat, barley and linseed were higher than the cassava residue. The GEMC (%), apparent metabolizable energy (kcal/kg) and apparent correct metabolizable energy values for nitrogen (kcal/kg) were, respectively: 75.37; 3,425 and 3,395 for oat milled; 75.73; 3,253 and 3,198 for barley milled; 70.76; 2,312 and 2,316 for cassava residue; 76.53; 3,774 and 3,704 for linseed whole; 76.75; 3,955 and 3,929 for linseed milled.
Coturnix coturnix japonica; digestibility; energy
