Hemato-Biochemical Changes of Layer Birds during Egg Production Reared in Sylhet Region of Bangladesh

A total of sixty (60) layer birds ISA Brown Strain divided in three cages were selected for study. The birds were maintained in Battery cage system in experimental unit of Sylhet Agricultural University, Bangladesh to investigate the effects of hematobiochemical changes during egg production of layer birds. The design of the experiment was RBD with five replications and four different layer birds of age of 24-28wks, 29-33wks, 34-38wks and 39-43wks. The highest value of TEC, TLC, Hb and PCV, SGOT, SGPT and Ca were 2.833±0.04 million/mm3, 21.7±0.10 thousand/mm3, 8.883±0.03gm/dl and 28.58±0.02 (%), 14.2±0.2iu/l, 23.03±0.23iu/l and 9.013±0.10mg/l of blood respectively, obtained during 39-43wks of egg production and lowest value was in 24-28 weeks of age. There was significantly (p < 0.01) lower in 24-28 weeks of age than the 39-43 weeks of age. The number of TEC, TLC and concentration Hb, PCV were increasing according to age of birds. The SGOT/AST, SGPT/ALT and Calcium (Ca) were statistically significant (p < 0.01) in different age and groups of layer birds during egg production. The concentration of SGOT/AST, SGPT/ALT and Calcium (Ca) were increasing according to the age of birds. The present results revealed that 39-43wks of age of layer birds found the maximum volume of hematobiochemical parameter.