The age dynamics of biochemical blood indices in broiler chicken (Gallus gallus L.)

Biochemical blood indices are important characteristics of physiological and health status of agricultural animals and poultry. In the past decades, the advanced measuring methodology and equipment including the development of automatic biochemical analyzers with standardized reagent kits have led to the significantly faster procedures and higher accuracy of analysis. The reference values of the biochemical indices determined by classic methods should therefore be redefined. In this study we report for the first time the revised reference values of biochemical blood indices including circulatory activity of blood digestive enzymes in growing broiler chicks ( Gallus gallus L.) during early ontogenesis (1 to 35 days of age). In the study, the hybrid chicks of an experimental broiler cross Smena 8 (line B59) were compared to their parental lines (Cornish line B5 and Plymouth Rock line B9) selected at the Smena Center for Genetic Selection (60 birds per genotype).The hybrids were fed ad libitum; parental lines were restricted in feed since day 15 of age...