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Using in-egg feeding, as well as feeding the bird immediately after hatching, it is possible to influence the ability of the adult bird to absorb minerals and other nutrients from feed, its resistance to immunological and oxidative stresses.

In this work, we study the effect of these factors during the first few days after hatching of chicks (reduced norms in the feed of calcium and phosphorus during the first 5 days after hatching). This is the second part of the perinatal period, influencing which it is possible to investigate how they subsequently affect metabolism.

The introduction of nutrients in the second stage of the perinatal period according to appropriate schemes improved the nutritional status of the perinatal chick.

The studies presented in this work are focused on determining the impact of pre-start diets with a limited content of calcium and phosphorus on productive indicators in chickens (live weight during growing and biochemical indicators in blood serum, which would characterize metabolic processes and indicate the intensity with which these processes occur. Based on the results obtained, the following conclusions can be drawn: the impact of pre-start diets with a limited content of calcium and phosphorus, during the second period of perinatal development of the chick (4-5 days after hatching), leads to an increase in the weight of the bird during 14 weeks of life, which is indicated by an increase in the weight of chickens in the experimental groups compared to the control group with a high degree of probability. Analysis of biochemical indicators in the blood serum of chickens indicates that no deviations from the norm were detected, both in the experimental and control groups, but the level of many indicators was significantly higher in the experimental groups compared to the control, and this, in turn, indicates a higher intensity metabolic processes in the body of experimental poultry.

 

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