Reduction of bird heat stress. M. Czarick (University of Georgia)
I totally agree, Mike! Sometimes I see people treating the water with no water analysis.
Dear Dr. Czarick
So many thanks for your presentation. I have a question for you relating to Grandparents:
Referring to a Broiler Breeders Grandparents male house, some growers argue that this type of heavy-weight birds are sensitive to increased air speed mainly for fear of early molting “considering the genetics issue” (the air speed does not exceed 1.7 m / s during production)!
We found panting birds, especially in the second half of the house out of the cooling area (closed system) when outside temperature rises to above 35 ° C. Is their argument considered a reasonable justification not to increase the speed of air above 1.7 m/s in houses of 14 meters wide with a length of 130 meters?
This house is newly constructed and well equipped in terms of cooling area, insulation and number of fans where the air speed reaches more than 2.5 m/s when all tunnel fans are running.
Regards,
Waheed M. Ahmed
Cairo Poultry Company
Egypt
wahmed ahmed Nice to hear from you. During hot weather, you will not hurt breeders with an air speed of 3 m/sec let alone 1.7 m/sec. An air speed of 1.7 m/sec is very likely to result in heat stress when house temperatures are 26 C or warmer. An air speed of 2.5 m/sec is considered by most as the minimum tunnel air speed for breeders.
I agree with Dr. Czarick, producers add too many additives into the drinking water that may not be necessary and only increase production cost. I started with healthy hicks, gave vitamins in the water for the first week and just before and after vaccination to help them get over vaccine stress, made sure that the birds were comfortable, good ventilation, dry litter and other management steps that did not add unnecessary cost during the growing cycle.
Dear Dr. Czarick
Thank you very much for your presentation. I have 2 questions for you.
1- In a region with hot summer and cold winter, which methods of ventilation will be correct. As we need minimum ventilation in cold weather and tunnel ventilation in summer.
2- In a region with hot and humid summer, what kind of ventilation could help us?
Best Regards
Ali
We want to construct broiler tunnel houses 60 feet x 600 feet x 10 feet high at altitude 940m.
How much cooling pads and ventilation fan (54" 53000 m3/hr) should I use to obtain 2m/min air flow as mentioned in your video?
Dr. Mike Czarick thank you, that is the amount we calculated so we were on the right path. The amount of fans is where we are having some varying opinions. The fan we want to use is 54" 53000 m3/hr. also, the average outdoor temperature for 2017 has been 27 degrees Celsius and the average humidity is 75%. We want to achieve optimum air movement similar to that you recommend in the video. If you can share your thoughts on the number of fans we will be grateful. Thanks in advance.
Dr. Mike Czarick thank you for your response, the highest temperature recorded here is 39 degrees Celsius and the highest humidity is 87%.
I cannot answer this but it could be helpful for whoever attempts to for a temperature profile throughout the year at the location planned to be supplied.
Also whether you plan to use electricity from the grid or solar electricity production.
David Evans Last year to to-date the average outdoor temperature has been 27 degrees Celsius and average humidity is 75%. We plan to use electricity from the grid. It is cheap here in Trinidad and Tobago.
Dear Mr. Waheed M.Ahmed, from my opinion, geometry of poultry house is not important for temperature decreasing. Important is air volume (according to 1022 m2). Energy of water evaporation in both cases will be the same. Another matter is fans electric motors effectivity and proper fans sites. It is also different way to decrease electricity expenses: to add to the drinking water some anti-heat stress substances like citric acid, vitamins, betaine of special blends. It can help to increase the comfortable temperature for birds, and to spend less electricity.
1- What is the best dimensions for poultry house to get Homogeneity of temp. Inside the house?
2- Are there differences in dimensions between broiler, breeder, grandparent?
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