In ovo injection of different sources of organic and inorganic of zinc on post-hatch parameters, bone characteristics, and broiler chickens performance

An experiment was conducted to determine the effect of in ovo injection (IOI) of different sources of organic and inorganic of zinc on post-hatch parameters, bone characteristics, and broiler chickens performance. Fertile eggs (n=480) were weighted, distributed into 6 groups of 80 eggs in force-draft incubator. On 17th days of incubation, 2 groups were injected with 0.5 ml of 80 or 100 µg zincsulfate dissolved in physiology serum. Other 2 groups were injected with 0.5 ml of 80 or 100 µg methionine-zinc dissolved in physiology serum. Rests two groups were used as sham control (injected with 0.5 ml physiology serum) and un-injected control. After hatching, hatched chickens (2 chickens per each replicate) were randomly selected and parameters were measured. The results showed no significant differences were in the hatched chick’s weight. The highest percentage of hatching was related to IOI 100 µg methionine-zinc and 80 µg mg zincsulfate (p < 0.05). In addition, the IOI of organic and inorganic source of zinc increased tibia zinc (p < 0.05).The IOI 80 µg of zinc-methionine increased tibia weight (P <0.05) The IOI 80 or 100 µg zinc-methionine increase the tibia zinc content at 21 days of age (P <0.05). Also, tibia length increased with IOI 100 µg zincsulfate and IOI 80 µg zinc-methionine compared to other treatments (P <0.05). There was no difference in the apparent ileal digestibility of zinc and performance (feed intake, weight gain, and feed conversion ratio) in response to IOI different levels of organic and inorganic sources of zinc.