The economic and productive performances of the dietary corn replacement withcassava shavings flour were evaluated in 200 Lohmann LSL laying hens with 46weeks old, kept in 25 cages. The experiment was analyzed as a complete randomizeddesign with five treatments and five replicates of eight birds per experimentalunit. The treatments consisted of five levels (0, 25, 50, 75, and 100%) of cornreplacement with cassava shavings flour. Quadractic effect on daily feed intake,with averages of 100.68, 101.00, 100.72, 99.42, and 99.50 g, in the respectivereplacement levels, was observed. Viability, egg production and feeding conversion(kg/dz and g/g) showed no significant differences. It was observed treatmenteffect (quadractic effect) on egg weight, albumen percentage, shell percentage,shell thickness and specific gravity. Egg mass and yolk percentage were notaffected by the treatments. The 50% level treatment provided the lowest shellpercentage in spite of presenting the highest egg weight. The egg yolk colourwas affected by the treaments and showed linear decrease (7.84, 7.52, 7.35,5.32, and 5.12) as the corn replacement level increased. From an economicalviewpoint, the 100% level treatment presented higher difference on the costper kilogram of feed, egg-dozen, and egg-box in relation to the other treatments.It is possible to replace up to 100% of corn by with cassava shavings flourswith no changes on egg yield and feeding conversion. However, the replacementwill depend on the relative cost of corn and pigments to be used for correctingegg yolk pigmentation.
