Principles and methods of Illumination of laying Ducks

The principle of light entering the laying period is: it should only be gradually extended until it reaches 16 hours per day and night, and cannot be shortened, can not be suddenly stopped, early and late; the light intensity can not be strong and weak, only gradually strong, up to 8 lux per square meter (2 watts per square meter). It is necessary to maintain the standard of operating procedures to avoid causing stress reactions.