Abstract

The objective of this research was to evaluate the effect of levels and sources of dietary Zn and Mn forms organic or inorganic on performance and egg quality traits in laying hens. Experiment was carried out with 192 hens and 8 treatments and 6 replicated of 4 hens in a 14 weeks trial. Experimental treatments basal diet was supplemented with inorganic forms of Zn (Zn-O) and Mn (Mn-O) were gradually replaced with their organic forms in 0, 50 or 100%  (Amino acid complexes Zn-AA and Mn- AA). Treatments were used: (T1) BD supplemented with 100% Zn and Mn in inorganic form (control group), (T2) BD without Zn and Mn  in inorganic form, (T3) BD supplemented with 50% Zn and Mn in inorganic form, (T4) BD supplemented with 100% Zn and Mn in organic form, (T5) BD supplemented with 50% Zn and Mn in organic form, (T6) BD supplemented with 50% Mn in inorganic form and 50% Mn in organic form, (T7) BD supplemented with 50% Zn in inorganic form and 50% Zn in organic form, (T8) BD supplemented with 50% Mn in inorganic + 50% Mn in organic form and 50% Zn in inorganic + 50% Zn in organic form. The experimental results showed that feed intake, egg weight and egg shape index were significantly increased with organic Zn or  Mn sources and organic sources in combination with inorganic trace minerals (Zn and Mn) (P<0.05)‎.