El-Rayes, T., El-Damrawy, S., El-Deeb, M., Adel Abdelghany, I. (2019). RE/ POST-HATCH NANO-ZINC SUPPLEMENTATIONS EFFECTS ON HATCHABILITY, GROWTH PERFORMANCE, CARCASS TRAITS, BONE CHARACTERISTICS AND PHYSIOLOGICAL STATUS OF INSHAS CHICKS. Egyptian Poultry Science Journal, 39(4), 771-789. doi: 10.21608/epsj.2019.63532
T. Kh. El-Rayes; S. Z. El-Damrawy; M. H. El-Deeb; I. Adel Abdelghany. "RE/ POST-HATCH NANO-ZINC SUPPLEMENTATIONS EFFECTS ON HATCHABILITY, GROWTH PERFORMANCE, CARCASS TRAITS, BONE CHARACTERISTICS AND PHYSIOLOGICAL STATUS OF INSHAS CHICKS". Egyptian Poultry Science Journal, 39, 4, 2019, 771-789. doi: 10.21608/epsj.2019.63532
El-Rayes, T., El-Damrawy, S., El-Deeb, M., Adel Abdelghany, I. (2019). 'RE/ POST-HATCH NANO-ZINC SUPPLEMENTATIONS EFFECTS ON HATCHABILITY, GROWTH PERFORMANCE, CARCASS TRAITS, BONE CHARACTERISTICS AND PHYSIOLOGICAL STATUS OF INSHAS CHICKS', Egyptian Poultry Science Journal, 39(4), pp. 771-789. doi: 10.21608/epsj.2019.63532
El-Rayes, T., El-Damrawy, S., El-Deeb, M., Adel Abdelghany, I. RE/ POST-HATCH NANO-ZINC SUPPLEMENTATIONS EFFECTS ON HATCHABILITY, GROWTH PERFORMANCE, CARCASS TRAITS, BONE CHARACTERISTICS AND PHYSIOLOGICAL STATUS OF INSHAS CHICKS. Egyptian Poultry Science Journal, 2019; 39(4): 771-789. doi: 10.21608/epsj.2019.63532
RE/ POST-HATCH NANO-ZINC SUPPLEMENTATIONS EFFECTS ON HATCHABILITY, GROWTH PERFORMANCE, CARCASS TRAITS, BONE CHARACTERISTICS AND PHYSIOLOGICAL STATUS OF INSHAS CHICKS
11Dep.of Anim.Prod., Fac. of Agric., Tanta Uni.,31527, Tanta, Egypt.
22Anim.Prod. Res.inst., Agric.res. Center, Dokki, Giza,Egypt.
Abstract
Two trials were conducted to evaluate the efficiency of nano-zinc (ZnO-NPs) supplementations on hatchability, growth performance, carcass traits, bone characteristics and physiological status of Inshas chick.In the initial experiment, on day 18 of the incubation 1020 eggs in four groups (n=85, r=3) were injected with ZnO-NPs at levels of 0, 60, 80, and 100μg /egg.Results showed that in ovo injection with ZnO-NPs at different levels has no significant effect on the hatched chick weight. In addition, nano-zinc at the level up to 60µg/ egg has no adverse effect on hatchability percentage.In the second experiment 480 one-day-old unsexed chicks from the initial experiment with an initial weight of 33.64 ±0.98gwere fed on a diet containing nano-zinc at the level of 0 or 30 mg / kg diet. The interaction of ZnO-NPs pre/post-hatch supplementations showed a significant effect on final body weight, weight gain, feed intake, and feed conversion ratio and the non-treated chicks in the control group showed the lowest values. The highest spleen weightwas recorded at the level of 100 μg ZnO-NPs/egg. The highest content of zinc in the breast meat was observed in chicks supplemented with 100μg/egg and fed 30 mg/ kg diet. Tibia bone ash content increased with increasing nano-zinc in the diet, meanwhile tibia bone Zn and P contents were increased with increasing nano-zinc in ovo supplementation. Chicks fed 30 mg ZnO-NPs/ kg diet showed highest values for tibia length, thickness when pre-hatch eggs supplemented with 100 μg ZnO-NPs/egg and the highest strength when pre-hatch supplemented with 60 μg ZnO-NPs/egg. ZnO-NPs in ovo supplementation had no significant effect on serum biochemical parameters. Total protein, albumin, ALT, AST, HDL, LDL, and serum Zn content values were increased with increasing nano-zinc in the diet except LDL.The highest phagocytic activities were observed in chicks fed 30 mg/ kg diet and pre-hatched with 60, 80, and 100 μg ZnO-NPs/egg.
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