Three experiments were conducted to investigate the effects of dietary Zn source and level on growth performance, tissue Zn concentration, Zn metalloenzyme activity, metallothionein(MT) concentration, MT mRNA and Zn transporters-2(ZnT-2) mRNA level, so as to evaluate the optimal Zn level and relative bioavailabilities of different Zn sources for broilers fed a corn-soybean meal diet..
Experiment 1. An optimal dietary Zn level for broiler chicks fed a corn-soybean meal diet
Experime...