Market Broiler Management Practice Test

For broilers reaching a weight of 2.5 to 3.0 kg, how many hours of darkness should occur from 100-160 grams before reducing at 22 days of age?

1. 7 hours

2. 8 hours

3. 9 hours

4. 10 hours

The correct answer is: 9 hours

The correct amount of darkness for broilers reaching a weight of 2.5 to 3.0 kg is nine hours. This specific requirement is based on the principles of poultry lighting management, which are crucial for optimal growth, development, and welfare of the birds. In the early stages, broilers benefit from prolonged light exposure to encourage eating and growth. However, as they reach heavier weights, the management of light and dark cycles ensures that the birds can properly rest and metabolize their feed. Research indicates that providing prolonged periods of darkness, especially at specific weight ranges, helps manage stress levels and improve overall health, leading to better feed efficiency. While less than nine hours of darkness might not provide sufficient rest for the broilers, exceeding this duration may reduce feed intake and growth rates. Therefore, maintaining nine hours of darkness at the appropriate growth stage helps balance these factors, supporting optimal performance as the birds approach their target weight.