Metabolizable energy values of some mixed grains Nigerian brewery by-products for cockerels

An experiment was conducted to determine the apparent and nitrogen-correcte d metabolizable energy values (MEn) of some brewery by-products available i n Nigeria, namely, malt dust [1000 g kg(-1) barley (MD)] and brewers dried grains [(1) 333.3 g kg(-1) barley plus 666.7 g kg(-1) maize (BDGBM), (2) 32 0 g kg(-1) barley plus 320 g kg(-1) sorghum plus 360 g kg(-1) maize (BDGBSM ), and (3) 500 g kg maize plus 500 g kg(-1) sorghum (BDGMS)] using cockerel s. Apparent metabolizable energy (ME) values of the brewery by-products wer e 8.33 +/- 0.15 MJ kg(-1), 9.12 +/- 0.23 MJ kg(-1) 9.67 +/- 0.15 MJ kg(-1) and 10.50 +/- 0.13 MJ kg(-1) Corresponding MEn values were 7.90 +/- 0.15 MJ kg(-1), 8.66 +/- 0.23 MJ kg(-1), 9.20 +/- 0.15 MJ kg(-1), and 9.92 +/- 0.1 3 MJ kg(-1), respectively. The rate of passage (ROP) was similar for all th e test diets.