Proper and effective ventilation plays a crucial role in enhancing production performance in poultry farming. Maintaining an optimal temperature within the chicken house is closely tied to good air circulation. The metabolic processes of broilers depend heavily on oxygen, and sufficient airflow supports their growth, maintains health, and improves feed conversion efficiency.
Good ventilation helps remove moisture, ammonia, dust, and excess heat from the house, ensuring a steady supply of fresh air for the flock. Poor ventilation can lead to high ammonia levels, which can cause serious production losses. Many breeders tend to focus only on temperature control during the early stages of brooding, neglecting the importance of ventilation. This oversight can result in issues like ascites in the later stages of broiler development.
During weeks 2, 3, and 4, inadequate ventilation may increase the risk of chronic respiratory diseases and colibacillosis. As broilers grow, their oxygen demand increases, along with waste production. It becomes essential to enhance ventilation while maintaining appropriate temperatures. At this stage, proper ventilation is the key to maintaining a healthy environment inside the house.
In the late stages of broiler production, the birds become heavier, consume more feed, and produce more waste. If not properly ventilated, carbon dioxide, body heat, moisture, and ammonia can accumulate, leading to poor living conditions. This not only slows down growth but also raises mortality rates. A broiler’s daily weight gain can reach about 1.4 kg, and losing one bird can cost around 20 yuan. Thus, effective ventilation management in the later stages is critical.
To achieve good ventilation, two methods are commonly used: the minimum ventilation system and minimum ventilation control. Let's explore them in detail.
**Theory 1: Minimum Ventilation System**
The minimum ventilation system ensures that the oxygen level in the house remains at 19.2%, which is vital for the health and well-being of the chickens. This system involves controlled fan operation, where air is exchanged every 8 minutes, with fans running for 2 minutes in a 10-minute cycle. This method balances air quality and temperature stability, preventing cold stress among the flock.
The system alternates between minimum and maximum standards. When the internal temperature rises above the target, fans operate continuously to manage excess heat. The pressure inside the house should remain constant, and adjustments to the inlet area are often more effective than increasing the number of fans.
Practically, using an automatic temperature control system like the JL318 environmental controller can help manage ventilation efficiently. This device allows for flexible control based on the age, weight, and external conditions of the chickens.
For example, in a chicken house measuring 120m x 12m x 2.55m (total volume 3672 m³), the required exhaust fan capacity to exchange air every 8 minutes would be around 459 m³/min. Based on fan specifications, you might need 2 or 3 units depending on the model.
**Theory 2: Minimum Ventilation Control**
This approach focuses on providing enough fresh air to meet the oxygen needs of the chickens while keeping harmful gases below acceptable levels. For instance, a ventilation cycle of 5 minutes could involve running the fan for a set period to ensure adequate air exchange. The goal is to maintain good ventilation without causing a significant drop in temperature.
The minimum ventilation standard typically requires 0.0155–0.017 m³/min of fresh air per kilogram of chicken weight. Using this formula, you can calculate the percentage of time the fans should run based on the number of chickens and their average weight.
For example, if you have 5000 chickens averaging 1.5 kg, and each fan provides 167 m³/min, the opening time would be approximately 1.9 minutes per 5-minute cycle. Adjustments can be made based on external conditions to optimize both temperature and air quality.
**Practical Tips for Effective Ventilation**
- Start with short ventilation cycles and gradually increase the time as needed.
- Monitor humidity and keep it below 70% to prevent dampness-related issues.
- Adjust ventilation after lights are turned off at night to maintain stable temperatures.
- Avoid direct drafts on the chickens by adjusting fan speed or using a governor.
- Ensure proper ventilation without overdoing it, as excessive airflow can waste energy and cause cold stress.
- Always consider the actual fan performance when calculating required air volume, as real-world output may be lower than rated values.
- Use remote temperature monitoring devices like the Chicken Guardian No. 2 to detect and respond to temperature fluctuations quickly.
By implementing these strategies, poultry farmers can ensure a healthy, productive environment for their broilers throughout the entire growth cycle.
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| Name | Hanging steel brazier firepit |
| Material | Corten steel |
| Cooking plate Size | Diameter 800mm |
| Weight | 65KG |
| Packing | wooden box packing |
Packing
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