Increased Stress Resistance of the Offspring Egg Cross Chickens when Using Biologically Active Substances before Hatching.

Kochish, I I; Lugovaya, I S; Azarnova, T O; Naydensky, M S; Antipov, A A; Petrova, Yu V; Anshakov, D V; Zolotukhina, E A

Application of biologically active compositions, containing colamine, succinic acid, serine, and pyridoxine hydrochloride before hatching decreased hatchery waste and increased hatching rates by 2.65% and egg hatchability by 1.85%. The chicks of the experimental group exhibited a decrease in the intensity of lipid peroxidation, which indicated a greater resistance to stress. This conclusion is additionally based on an increase in the Krebs index by a factor of 1.74 (p < 0.01) and leukocyte intoxication index by 5.53% and a decrease in the lymphocyte-granulocyte index by a factor of 1.75 (p < 0.05) and leukocyte index by 1.67% (p < 0.05). The body length of the offspring of the experimental group was by 2.12% less and safety for 60 days of cultivation was 3% higher compared to the control.