Abstract
A study was undertaken with laying hens to investigate the effect of cellulase supplementation to common naked barley (C-NB), high protein naked barley (HP-NB) and super high protein naked barley (SHP-NB) based diets. C-NB or HP-NB based diet was prepared by substituting C-NB or HP-NB for all of corn and part of soybean meal in the corn soybean meal diet, and SHP-NB based diet was provided by substituting SHP-NB for large part of corn and all soybean meal in the basal diet. Crude protein content of C-NB, HP-NB and SHP-NB, on as-fed basis was 12.0, 15.1 and 17.9%, and lysine content was 0.41, 0.62 and 0.59%, respectively. ME of C-NB or HP-NB based diet was significantly increased by cellulase supplementation. There was no significant increase of ME value of SHP-NB-based diet by cellulase supplementation. The laying performance was not significantly affected by feeding naked barley or cellulase supplementation.
