Influence of direct ultra violet blue (UVB) light exposure on serum levels of vitamin D3, calcium and phosphorus in layer chickens

The body needs vitamin D3 for a number of metabolic processes, such as healthy bone development, calcium phosphate absorption, and immune system stimulation. This study investigated the impact UVB exposure (3 hours per day) on levels calcium, phosphorus, in serum crossbred (White Leghorn N strain Desi) layer chickens from 29 to 40 weeks age. In order achieve optimal light featherless skin bird feet, 60 cm long, 240 V, 50 Hz, 36 W tube outfitted with heat protection reflector was positioned lower front area cages at distance 20 cm. mean concentration exposed birds 13.38±0.41 ng/mL. which significantly higher (p