17 A. O. Ani A.U Okorie Journal of Animal and Plant Sciences JAPS 20132013/10/01 23 5 1228-1235 1018-7081 NA <p>The effects of processed castor oil bean (Ricinus communis L) meal (CBM) and supplementary DL- methionine on nutrient retention, carcass and organ weights of broiler chicks were investigated for five weeks. Two hundred and sixteen 7-day old broiler chicks (Anak strain) were randomly divided into 12 treatment groups of 18 birds each in a 4 x 3 factorial arrangement involving four processed CBM levels (0,10,15 and 20%) and three DL &ndash; methionine levels (0, 0.25 and 0.5%). During week 5 of the experiment, the apparent retention of the proximate components and the organs weights of birds were evaluated. Results showed that chicks on treatments 10-12 had lower (P&lt;0.05) retention of DM, nitrogen, EE and NFE and lower (P&lt;0.05) body weight, liver, kidney, spleen, heart and empty gizzard weights than birds on other treatments. Result showed that 10% and15% processed CBM can be included in the diet of broiler chicks without and with DL-methionine supplementation, respectively to enhance nutrient retention and for normal organ development of broiler chicks.</p> castor oil bean meal, DL-methionine, effects, nutrient utilization, organ weights, broiler chicks Pakistan Agricultural Scientists Forum https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-503