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Based on the biology and growth characteristics of black phoenix chickens, they can be classified as broiler chickens from 7 to 25 weeks of age.
At around 6 weeks old, black chickens begin to shed their downy feathers and develop silky feathers. These silk-like feathers have poor insulation properties, making them more vulnerable to temperature changes. By about 9 weeks, their thermoregulation abilities improve significantly. At this stage, the temperature in the rearing area should be gradually reduced during the day, but still maintained at night to ensure warmth.
Before moving the chickens into the rearing house, it is essential to thoroughly disinfect the space, feeders, and waterers. Prepare the necessary feed, bedding, and medications. Organize staff to sort the chickens into groups based on size, health, and gender. Proper grouping helps manage the flock more effectively and ensures better growth outcomes.
This period is critical for the development of long bones and muscles. Providing adequate space for movement is crucial to promote physical fitness. Under a free-range or flat-raising system, the recommended stocking densities are 15 per square meter for 9–13 weeks, 10 per square meter for 14–17 weeks, and 7 per square meter for 18–25 weeks.
Lighting should be carefully controlled during the rearing phase. A daily light period of 8 to 10 hours is typically ideal to support healthy growth and avoid stress.
Feed restriction plays a key role in managing the weight of black phoenix chickens, which directly affects their future egg production. During this time, reduce the energy and protein content in the diet, while increasing the proportion of bran and green feed to lower the concentrate level. Ensure that there are enough feeders, and feeding should be done quickly so that every chicken gets enough food. Regular weighing is essential: chickens should weigh around 750g at 90 days, 900g at 120 days, 1100g at 150 days, and 1250g by 180 days. Weigh every 10% of the flock every two weeks. If the average weight is below the target, increase the feed amount; if it's above, consider reducing the number of feedings.
Maintaining a clean and quiet environment inside and outside the rearing area is also vital. This helps reduce stress and promotes better health and growth in the chickens.