This study was conducted to compare the absorption of organic manganese with inorganic manganese by ligated and perfused intestinal segments. A completely random design was applied to five treatments of different manganese sources, which were MnSO_4·7H_2O, Mn-Gly chelate, Mn-Met chelate, the mixture of MnSO_4 and glycine, the mixture of MnSO_4 and methionine.Thirty male broilers at the age of 4 weeks were randomly allotted to one of the five treatments for six replicates of one bird each. The duodenum, jeju...