Why is the daylight hours in laying hens artificially extended to 20 hours, and for broilers, reduced to 6 hours per day?

Daylight hours are an important factor affecting the sexual behavior of birds. An increase in the duration of daylight activates the production of sex hormones – thus, laying hens stimulate an increase in egg production. Short daylight hours causes a decrease in sexual activity, so broiler males move less, do not fight each other, and all body resources are directed to increasing body weight.

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