Morpho-biophysical parameters of pigmented shells of eggs of cross Hisex brown chicks

Abstract

In the industrial production of poultry products, agricultural poultry must meet certain requirements – the level of productivity and technological properties. Commercial poultry farming currently has highly productive chicken crosses in its arsenal, from which eggs with white or brown shells are obtained. The variety in eggshell coloring is due to the demand in the consumer market and the productive qualities of the crosses themselves. Many people believe that one of the advantages of brown-shelled eggs is their thick and durable shells. However, the proportion of all damaged eggs in poultry farms indicates a high degree of damage to their shells, both white and brown. In this regard, the morpho-biophysical qualities of the egg shells of Hisex Brown cross chickens were studied depending on the intensity (weak, medium and strong) pigmentation of their shells using special techniques and devices. All the hens of the Hisex Brown cross were in the same feeding and maintenance conditions. Studies have shown that eggs with light brown and brown shells have the best shells. The shells of these eggs were thicker by more than 2-2.5% and heavier by 5.1% and 1.15% compared to eggs with weak and strong pigmentation, respectively. This determined a decrease in the elastic deformation index by more than 4% lower, and the shell strength was higher by 12.83% (P≤0.1) and 1.57% than in the groups with weak and strong pigmentation.