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Stress control measures on the poultry farm!

Stress control measures on the poultry farm!

370 280 RETECH

1.Temperature management

The management of temperature is based on the basic principles of “physiologically appropriate, stable in time, and uniform in space” to maximize the safety of poultry and reduce the probability of disease.

(1)Physiologically suitable

The temperature during the brooding period is very important to the growth and development of the chicks. Due to the difference in the body weight and vigor of the chicks, the temperature requirements during the brooding period will be slightly higher.

The setting of the brooding temperature is generally based on the dispersion speed, crop saturation and weekend weight of the chickens after the chickens are divided. In a comfortable environment, the chicks will be evenly distributed within 4 hours of being put into the house, and they will actively seek water and food. 24 Hourly crop saturation reaches 100%.

②High temperature feeding:

Poultry has an optimal temperature range physiologically. In the optimal temperature range, the feed eaten is mainly used for growth and development, and the animals exert their maximum production potential;

egg layer cage

egg layer cage

(2)Stable in time

Excessive temperature fluctuation is an important factor causing poultry stress, and maintaining the stability of the poultry house is one of the methods to prevent and control stress; in on-site management, the temperature difference between broilers should be controlled within 3°C, and the temperature difference between day and night for laying hens should be controlled within Within 5°C, the temperature difference of the fan in one cycle is within ±1°C, which can effectively avoid the stress response caused by temperature fluctuations.

(3)Spatially uniform

Uneven temperature in the house is a common malady in the breeding process, and it is also one of the reasons for the stress of poultry.

The display temperature of the sensor is only the temperature of a point, and a point with a surface to express the overall temperature of the chicken house; if the temperature in the three-dimensional space of the poultry house is uneven (or there is draught), then the temperature of the temperature sensor cannot represent the temperature of the chicken house. , the ventilation, heating and other tasks performed by the environmental control computer according to the temperature signal are all wrong. When the longitudinal temperature difference in the poultry house is less than 3°C, the lateral temperature difference is less than 1°C, and the temperature difference between the top and bottom is less than 1.5°C, the effect of the temperature difference on poultry can be ignored, so the uniform temperature in space can effectively prevent and control the stress of poultry.

2. Humidity

In spring, the air humidity is low and the body temperature is low, which is another reason for the stress of poultry. The body temperature is positively correlated with the humidity. Adjust the ventilation volume and ventilation time in time to avoid the fluctuation of body temperature causing stress to poultry.

chicken house fans

chicken house fans

3. Ventilation management

Ventilation management is one of the core parts of feeding management. The stable temperature of the house and the uniformity of space are achieved by ventilation. Therefore, ventilation management is also a key link in the prevention and control of stress.

(1)The poultry house is airtight

Airtightness is the basis for a poultry house to achieve uniform temperature. Therefore, a new poultry house or a new batch of poultry should be tested for sealing and thermal insulation performance to check whether the airtight performance of the house meets the requirements; the testing methods and evaluation standards are as follows:

① Detection method: Start one 48-inch or two 36-inch exhaust fans, and the total exhaust air is 20,000 cfm, resulting in negative pressure.

② Evaluation Criteria:

(2)The amount of ventilation

The purpose of optimal ventilation is to provide poultry with a suitable, stable and even environment, so as to give full play to the maximum production potential of poultry; the standard of ventilation volume is only a reference, and the optimal ventilation volume depends on stocking density, rearing mode, heating capacity and sealing. The actual situation of insulation is determined, with the ultimate goal of poultry being physiologically suitable.

(3)Rounding wind speed

The movement of the fan makes the cold air from the outside enter the poultry house through the air inlet window, generating a wind speed of ≥3.0m/s. Then slowly fall, the mixture of cold and hot air not only achieves the purpose of effective ventilation, but also avoids the impact of cold air on poultry;

(4)Transitional ventilation

①With the arrival of spring, the outside temperature is getting warmer and the temperature inside the house is rising. We need to discharge the excess heat from the house. At this time, we need to turn on the transitional ventilation. The air exchange rate of the transitional ventilation is much larger than that of the horizontal ventilation. But still do not want to have the effect of air cooling, to avoid the frequent changes in body temperature to cause stress to the poultry.

②Automatically control the switch of the air inlet window is the key to the success of the transitional ventilation. When the transitional ventilation is started, with the continuous change of the number of fans in operation, to keep the wind speed of the air inlet window stable, the air inlet window needs to automatically follow the increase or decrease of the number of fans opened. Enlarge or shrink, an automated circulator can easily handle this problem, but manually adjusting the size of the intake window to maintain a stable round-off wind speed is very difficult, and sometimes impossible. If the area of ​​the intake windows cannot match the number of fans or the amount of ventilation, the consequence is that the wind speed in the poultry house is too high or too low, and the cold air will come into contact with the poultry and cause cooling stress.

chicken house

chicken house

4.Nutrition regulation

(1)Vitamin C

Vitamin C plays an important role in resisting cold stress. Studies have shown that under cold stress, the vitamin C synthesized by poultry itself cannot meet the needs of body metabolism; supplementing a certain amount of vitamin C can promote the growth of poultry and improve production. Egg volume and shell strength.

(2)Vitamin E

In addition to the reproductive function of animals, vitamin E can also enhance the immune function of poultry. Supplementing vitamin E can effectively improve the antibody titer of poultry. Adding vitamin E to the nutrient-adequate chick diet can protect chicks from Escherichia coli. Infect;

Amino acids play an extremely important role in protein synthesis, endocrine regulation, maintenance of acid-base balance, and are resistant to cold stress.