This experiment was conducted to test the effect of the paprika pigment ing additive on egg yolk colour of layer fed wheat-based diet.480 Lohman layers at 53 weeks were allotted to five dietary treatments randomly(three replicates o f 32 layers per replicate).The dietary treatments were:wheat diet(C),C+0.1%,C+0. 2%,C+0.4% and C+0.8% paprika extract,respectively.The results showed that:(1)The RCF of yolk in the trial groups increased significantly,the higher of paprika e xtract level,the more RCF was (P<0.01...