The scale of broiler farming is expanding and the equipment is getting better and better, but there are still farmers confused: chickens with cooling curtains are easy to catch cold, chickens without wet curtains Feed intake decreased and growth was slow. Even heat stress can lead to large-scale death of broilers; the reason is still not ready, the following four will definitely help you.

First, prepare a wet curtain fan

A 48-inch fan, often equipped with a 6m2 wet curtain, counts more than the wet curtain area; I do not know, when buying wet curtains, equipment Manufacturers are calculated according to the outer frame. In actual use, they use their effective ventilation area. The effective ventilation area can only reach 70-90% of the design area. At the same time, after using the wet curtain for 1-3 years, the ventilation efficiency is measured. Can be reduced by 10-30%, more people with poor management, because the scale is attached, the willow scum dust dust clogged, the wet curtain paper bubble rot, the wet curtain ventilation efficiency can reach more than 40%.

When the size of the chicken house is longitudinally ventilated in summer, the negative pressure often exceeds 20Pa, and the ventilation efficiency of the fan is often reduced by more than 20%. The ventilation effect of the poor quality fan is even more terrible; if the house is equipped with quality Poor fans, when using wet curtains, plus the wind-shielding factor of the cooling curtain water film, the ventilation efficiency will be worse, the wind speed of the transverse section in the chicken house will not reach the design standard, and the cooling effect of the wet curtain is even more difficult. Start.

Second, master the wet curtain data

The use of the cooling curtain is to use the evaporation effect of the water, so the wet curtain dry and wet circulation mode is generally required; at the same time, the wet curtain pump power is considered. The water pipes are thick and slender, which will affect the wetness of the wet curtain cloth.

Third, understand the outside weather

The outside weather is an important reference data for the application of wet curtains. Generally, the application of wet curtains should be considered at outdoor temperatures above 28 °C. At the same time, the relative humidity must be considered. When less than 40%, in most parts of China, only the air-cooling effect can meet the needs of flock fattening; above 80%, the damp heat stress will be more obvious, then it is generally recommended that the wet curtain be added with a small amount of dry and wet mode, or Longitudinal ventilation assists in the addition of anti-heat stress vitamins to survive hot and humid weather.

IV. Defining the needs of the flocks

Broilers generally consider using wet curtains at the age of 25 days; considering the different temperature and humidity of the house, the cooling effect of the cooling curtains is different. The demand for flocks varies, and it is also necessary to clarify the fluctuations in the temperature and humidity of the house and the performance of the flock under different wetting ratios of wet curtains.