Effects of selected tropical legume and oil seeds on egg quality and performance of laying hens in Nigeria
Olabisi Onabanjo University, College of Agricultural Sciences, Dept. of Animal Production, Ayetoro, Ogun State, Nigeria; Department of Animal Science, University of Ibadan, Nigeria
Raw jack-beans, bambara groundnuts and benne seeds were fed to exotic hens in a six - week experimental study to assess their toxicological effects on egg quality and laying performance. The legume and oil seeds selected for this study were used to replace soy bean meal at 25% and 50% levels. Egg weight and hen - day production were significantly (P<0.05) reduced in birds fed 25% and 50% raw benne seed - based diets. Feed conversion ratio was significantly (P<0.05) increased in birds fed 50% raw benne seeds. Egg yolk index and haugh unit were significantly (P<0.05) reduced across the groups. The reductions were however more pronounced in birds fed 50% raw jack beans and 50% raw benne seeds respectively. The whole egg protein was similar in all the groups. The yolk protein and albumen protein were however significantly (P<0.05) reduced across the groups. The fat contents of the whole eggs and yolk were more significantly (P<0.05) reduced in birds fed 50% raw jack beans and 50% bambara groundnuts respectively. Regression analysis revealed significant (P<0.05) correlations between egg weight and haemagglutinin (r = -0.47), tannin, (r = -0.55),; Yolk index and haemagglutinin (r = -0.54), trypsin inhibitor (r = -0.51); Haugh unit and tannin (r = -0.68), oxalate (r = -0.51); Yolk protein and haemagglutinin (r = -0.48), trypsin inhibitor (r = -0.48). © 2015 Trop. Agric. (Trinidad).