The aim of this study is to study the effect of in ovo injection with iron nanoparticles or iron methionine, also with their studies when adding them as nutritional supplements to diets on productive and physiological performance of Maamaura chickens strain. 540 fertile eggs from Maamaura chickens strain were used in this study. Eggs were randomly divided into 6 treatments groups in the incubator, each of which included 3 replicates (30 eggs each). The experiment is designed as follows: T1 control without injection, T2 injected with 0.1 ml saline solution 9.0% T3 injected with 0.1 ml of nano iron methionine particles / egg, T4 injected with 0.1 ml iron methionine/egg, T5   after the eggs hatch the hatched chicks were fed diet supplemented with 20 mg iron methionine / kg diet and T6 hatched chicks were fed diet supplemented with 5 mg nano iron methionine - particles / kg diet. Live body weight was taken at day old and every two weeks to the end of the experiment, feed intake was determined every two weeks hatchability, mortality percentage and chick weight at hatch were determined. Some blood parameter and carcass traits were determine at the end of the experimental.
The results obtained that T3 and T4 significantly increased the weight of hatched chicks, live body weight and hatchability percentage and also improved feed conversion at all period of estimation, and decreased embryo mortality. The results also showed that T4and T5 respectively significantly increases body weight and enhanced FCR. The improvement was found in all blood parameters and all carcass traits by all treatments compared to control.
Conclusively, it could be recommended by using in ovo injection with iron methionine and iron methionine nano particles to improving the productive and physiological performance of chickens specially local breeds of layer chicks. Also the use of Iron nano-particles in ovo injection gave the best results under the prevailing conditions.