Lysna B. Metabolic, productive and reproductive indices of laying hens depending on different diet composition

Object - feed ingredients and biologic active substances, as influence factor of metabolism processes, productivity and reproductive functions of breeder laying hens. Aim - to study the influence of diets for breeder laying hens, different by their feed components and biologic-active substances composition, but identical by nutritive ability, on indices of protein and carbohydrate metabolism, egg’s incubatory qualities, embryos metabolic process, growth and development of their starogeny and metabolic processes in hen’s organism. Methods - biochemical –indices of protein and carbohydrate metabolism in tissues, triiodothyronine level in serum, zootechnical - incubatory gualities of eggs parameters, statistical –analysis of obtained results variance. Scientific - it was first conducted systemic study of feeding factors, in particular diet structure for breeder laying hens, on some links of protein and carbohydrate metabolism in tissues of hens, embryos and chickens. It was established that feeding ofbarley faba beans –rapecake diet with methionine and sodium sulphate additions, and 33% higher iodine level, in comparison with recommendation level, to laying hens, caused protein and carbohydrate metabolism intensification, normalized thyroid gland functional action, improved incubatory walities of eggs, theirs fertilizing ability and chickens hatchability, increased vitality of hatching chickens and positively effected on growth, development and metabolic processes in progeny. It was revealed change dynamics of dissolved proteins, aminous nitrogen, proteinases and aminotransferases activity, glucose, piruvate and lactate concentrations, glycogen content in yolk sac and liver of embryos during embryogenesis. It was proposed diet structure for breeder laying hens that can decrease mixed-feeds cost by simultaneous improvement of incubatory eggs gualities, increasing of cyickens hatchability and their growth and development.