鹅人工孵化技术参数与控制要点

Incubation technology is crucial in the poultry industry chain. Modern farms universally adopt artificial incubation. Chicken incubation takes 21 days, ducks 28 days, and geese 30-31 days. For chickens: days 1-18 at 37.8C with 55%-60% humidity; days 19-21 after transfer at 37.2C with 70%-75% humidity. Duck and goose incubation requires slightly higher early temperatures and higher late-stage humidity.

Egg selection and management decisively affect hatching outcomes. Hatching eggs should come from healthy high-yield breeding flocks with appropriate weight (55-65g for chicken, 80-100g for duck, 150-200g for goose), normal shape index, and clean uncracked shells. Storage should not exceed 7 days at 13-18C and 75%-80% humidity, large end up. Fumigation disinfection is required before setting.

Candling inspections during incubation include first candling (days 5-7), second candling (days 11-14), and third candling before transfer. First candling checks fertilization and early development, second checks development progress, and third removes dead embryos. After transfer, turning stops and quiet conditions are maintained. Chicks remain in the hatcher until feathers dry, followed by sexing, vaccination, and beak trimming.

Modern farms should apply reduction, resource recovery, and harmless treatment principles. Common treatment processes include aerobic composting, anaerobic biogas fermentation, and biological conversion using fly larvae or earthworms. Wastewater undergoes sedimentation-anaerobic-aerobic combined treatment with reclaimed water reused for greening. Dead birds must undergo harmless treatment through high-temperature rendering or biodegradation.

Chicken house construction should follow all-in-all-out principles. Environmentally controlled houses use negative pressure longitudinal ventilation, cooling pads, and automatic lighting systems to effectively control the microclimate. Floor density for broilers is 8-12 birds/m2, slatted floor 12-16/m2, and cages 20-30/m2. Layer cages provide approximately 400-500 cm2 per bird.

Meat duck farming offers rapid investment returns. With Cherry Valley ducks, raising 5,000 birds per batch and 7-8 batches annually yields 35,000-40,000 birds. Production cost is 18-22 yuan per bird at 3.0-3.2 kg market weight. At 9-11 yuan/kg, revenue is 27-35 yuan per bird with 6-12 yuan net profit. Annual net profit can reach 200,000-400,000 yuan.

Medication plays a supporting role in disease control. Antibiotics for bacterial diseases should be selected based on sensitivity testing to avoid resistance. Coccidiosis control uses rotation or shuttle programs. Chinese herbs like Coptis, Scutellaria, Isatis, and Astragalus polysaccharides effectively boost immunity as antibiotic alternatives.

Energy and protein are the two most critical nutrients in poultry feed. Corn serves as the primary energy source at 55%-65% of the diet. Protein supplements include soybean meal (15%-25%), cottonseed meal, and rapeseed meal as plant sources, plus fishmeal and meat-bone meal as animal sources. Mineral supplements (3%-5%) and premixes (0.5%-1%) are also essential.

Chicken breeds are categorized as egg-type, meat-type, and dual-purpose. Leading egg-type breeds include Hy-Line Brown and Lohmann Brown, producing 310-320 eggs at 72 weeks with FCR around 2.1:1. White-feathered fast-growing broilers like AA+, Cobb, and Ross 308 reach 2.5-2.8 kg at 42 days. High-quality yellow-feathered breeds such as Sanhuang, Qingyuan, and Wenchang chickens are prized for excellent meat quality.