| SUMMARY This experiment was carried out to evaluate the effects of four levels of dietary threonine (Thr) supplementations on growth performance, gut size and histomorphometric alterations of small intestines in broiler chicks in 1-14 days. Two hundred eighty-eight Ross 308 one-day-old male broiler chicks were randomly assigned to four treatments with six replicates (12 birds per replication) received a common diet based on corn, wheat and soybean meal that met nutrients requirement of Ross 308. Birds were fed dietary treatments consisting of four levels of standardized digestible (SD) Thr: control diets (Basal diets) containing 0.65% SD Thr, 0.89% SD Thr (nutrients requirement of Ross 308), 0.93% and 0.97% SD Thr. Body weight gain (BWG), feed intake (FI)... |
