the impact of in ovo injection of organic manganese on broiler breeder hen egg hatchability and progeny broilers productivity

Background: the aim of this study was to investigate the impact of in ovo injection of organic manganese (mn) on the hatching traits and performance of broiler chickens.methods: a total of 320 eggs from the ross 308 strain, with an average weight of 65 g, were used for the experiment. the birds were randomly divided into four groups: four negative control groups (no injection), one positive control group (in ovo injection of 0.272 ml of normal saline solution), manganese i group (in ovo injection of 0.013 mg of organic mn), and manganese ii group (in ovo injection of 0.026 mg of organic mn). results: the injected treatments showed a significant decrease in the percentage of hatched chicks compared to the negative control group (p < 0.0001). furthermore, the in ovo injection of mn caused a significant increase in the final weight of the birds and their feed consumption (p < 0.0001). the experimental treatments also affected blood parameters, with blood triglyceride, cholesterol, and lipoproteins levels demonstrating a decrease compared to the negative and positive controls (p < 0.0001). conclusion: the in ovo injection of organic mn showed favorable results in broiler chickens’ performance indicators while showing no impact on immune response and microbial population.