Reduction of bird heat stress

Reduction of bird heat stress. M. Czarick (University of Georgia)

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Ing. Dragan Ionut Ing. Dragan Ionut
Agro Engineer Zootechnist
July 6, 2017

Thank you.
One of the best presentation about poultry ventilation
Congratulation for your work.

Reply
Md. Hamim Uddin Md. Hamim Uddin
ms in poultry science
May 19, 2018

Dear sir,

Fan run by airspeed basis or temperature basis in broiler houses explain which one best and why?

Reply
Dr. Mike Czarick Dr. Mike Czarick
Agricultural Engineer
May 22, 2018
Tunnel fans need to be operated based on both air temperature and speed. Primarily fans are operated off of temperature than possibly increased based on the birds reactions...for example panting.
Reply
May 30, 2018
Yes, how to reduced body temperature after heat stock of laying bird, because 42 - 45 degrees temperature bird not response any medicine which are use to control heat stocks.
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June 3, 2018
sunil kumar
Vitamin C. And bicarbonates are effective in control of heat stress.
Reply
May 30, 2018
We have a broiler farm using tunnel ventilation and evaporative cooling system. We operate fans and air speed according to the age and inner climate conditions. We belive that the enthalpy in the house which counts at the end of the day. The birds do not suffer from heat stress if all climate parameters under control.
Reply
May 31, 2018

Our company have around 45 farms through out Pakistan having different climatic condition.

We have three major thing in mind. Temperature, humidity, & density of birds according to the age.
1-Temperature according to age we can maintain through wind speed, Cooling pads thickness,
number of pads according to requirement & flute angle of pas 45x45 or 45x15, water flow on cooling pads.
2- High Humidity in coastal areas. Here the temperature is important but most important is exchange of total air volume of house as soon as possible that 0.5 to 0,minutes. As if the out side humidity is 80% inside the humidity will be very high.so, we need to expel this air as soon as possible as early you remove the air birds will be comfortable.
Density. In hot & humid areas density of birds play very important roll in these area we have to increase the space per bird at a maximum level it will reduce the temperature as.well as humidity it will reduce the panting & suffocation.It is a very wide subject we can discuss it one by one some other time.Now there are so many types of environmental control devices even you can feed int the whole life of birds environmental requirement it will control according to birds requirement automatically.

Thank you for your valuable time.

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Dr. Mohammad Akram Dr. Mohammad Akram
Consultant Microbiologist
May 31, 2018

It is a nice knowledgeable presentation on control of heat stress.
Ref. to Dr. Danny Hooge's article on the same subject, use of 0.4 to 0.5% Sodium Bicarbonate.
(NaHCo3) in feed can be helpful to control the Respiratory Alkalosis and reduce the losses during high heat time.
I have applied this recommendation in many farms of broilers, particularly naturally ventilated houses and got good results.
Kindly let me know your opinion on this issue, in addition to your recommendations on managemental factors.

Best regards,
Dr. M. Akram, Consultant Microbiologist, Micro Lab. Karachi Pakistan.

Reply
June 1, 2018
Dr. Mohammad Akram thanks for your advice, I will try it on my farm in Nigeria!
Reply
Edet Edem Okon Edet Edem Okon
Student
June 1, 2018
Dr. Mohammad Akram ,thank you for your contribution I will try it in my farm. I really appreciate you so much thank.
Reply
June 1, 2018
Dr. Mohammad Akram
Hi, your recommendation is Ok.. The research I just concluded two months ago using naturally well ventilated houses gave a very good result. I strongly support your recommendations.
Warmest regards, Nwose Roseline Bwuguru, Animal Nutrition and Forage Science (FUNAI) Ebnyi State, Nigeria.
Reply
June 1, 2018
Hello Dr M akram
Thank you for your comments
I want your email
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Dr Abdulla Ahmad tahir Dr Abdulla Ahmad tahir
Animal Health Technologist
June 2, 2018
Yes Dr sb we using up-to 0.25 Nahco3 percent in feed with 0.2 Nacl.
Reply
Dr Abdulla Ahmad tahir Dr Abdulla Ahmad tahir
Animal Health Technologist
June 2, 2018
Bataine is must to reduce heat stress
Reply
June 3, 2018
Dr Abdulla Ahmad tahir

Betaine is seen to be effected in weight gain not in reducing heat stress.
Reply
Dr Piotr Stanislawski Dr Piotr Stanislawski
Nutritionist
June 12, 2018
Dr zeeshan awan what about the osmoprotection with betaine? weight gain -this is the result of methionine sparring; can replace 15-20% dietary Meth. I usually advice betaine as osmoregulator for heat stress period.
Reply
June 13, 2018
Dear Dr.Zeeshan, betaine is natural osmolyte substance. It hold the water inside the cells. Paralelly betaine reduced fat content and increased meat content in broilers. Saudi Arabia poultry farms use betain against heat stress in high doses, till 2 kg/tonn of feed, according to recommendations of Danisco Animal Nutrition/DuPont Biotechnologies. Of course, other methods against heat stress, like sodium bicarbonate and vitamin C is reason to run paralelly, for better results. And effective ventilation/humidity, to reduce temperature, too.
Reply
Kausar Shaikh Kausar Shaikh
Businessman
June 20, 2018
Dr. Fiodor S. Marchenko
Betaine quality matters in Asian Markets as most of the farmers are not educated and prefers cost comparing as cheap China products are on shelves . Difference between Betaine if any should be highlighted
Reply
Goh Geng Hua Goh Geng Hua
Student
June 20, 2018
Kausar Shaikh hi is it china betaine anhydrous got different mechanism of process Which cost is less effective?

as i am using betaine hcl in my feed . Thank for comment
Reply
Ana Gavrau Ana Gavrau
Product Manager
June 22, 2018
Dear Goh Geng Hua ,

I was refering on natural betaine, from sugar beet molasses.
The main differences, between natural and synthetic betaine are the content on chloride (Cl) and on trimethylamines (TMA). High Cl levels have negative impact on the osmolytic function of betaine, and high TMA levels can confer a "fishy-taint" to the end-products. Furthermore, EFSA recognized high TMA levels as being corrosive to the eye, to the skin, and irritant to the respiratory tract (published in the EFSA Journal 2012). Therefore can lead to discomfort which can affect directly the production efficiency. I can only advise you to check the TMA level in your Betaine HCl product, this shouldn’t exceed 200ppm/ kg.


Thank you for all valuable information, thank you Dr. Mike Czarick for the very interesting and informative video presentation, and for the feedbacks on my contribution.
Sincerely,
Ana Gavrau

Reply
Salah El Safty Salah El Safty
Research
June 2, 2018
Thanks my colleagues for your valuable information and I suggest that you can use Vitamin C in water and using cold water also at same time in open houses beside soudium bicarbonate in feed. In broilers, you have to remove the feed during hot hours (almost from 10 am to 4 pm) to reduce bird’s stress due to heat increment (due to digestion and metabolism).
Regards
S A Elsafty
Prof. of Poultry Production Ain Shams Univ.
Egypt
Reply
Emad Elgazzar Emad Elgazzar
MASTER and PHD degree in microbiology
June 3, 2018
Salah El Safty Excellent solutions to decrease the effect of heat &heat stress beside we have to decrease oils content of feed during that periods
Reply
June 19, 2018
Emad Elgazzar WHY DECREASE OIL CONTENT?
Oils have a lower Heat Increment than both proteins and carbohydrates. They also facilitate production of a denser ration, which can compensate for reduced feed intake.
Reply
Hakeem IBRAHIM Hakeem IBRAHIM
Agro Technician
June 20, 2018
Joe Stanyer Please, note that, end product of oil metabolism is carbohydrates.
Metabolic heat is also produced during digestion of oil.
Thanks
Reply
Nizar Mahmoud Nizar Mahmoud
Agricultural Engineer
June 20, 2018
Joe Stanyer also, fat metabolism results in water molecule which helps the birds to reduce its body temperature
Reply
June 3, 2018
Use vitamin C, bicarbonates in water.
Cut down high protein diet in day time.
Proper ventilation.
Respiratory soothing agents like eucalyptus oil, peppermint, menthol should be given in day time.
Reply
June 4, 2018

Heat stress results in respiratory alkalosis leading to excessive loss of Carbon dioxide due to open mouth breathing. CO2 released comes from two sources 1) breakdown of Carbonic acid and 2) Oxidation of simple sugar (glucose).
Carbonic acid breakdown can be compensated with addition of Sodi bicarb.
Dietary electrolyte balancing will involve optimal addition of salt so that value for Sodium and Chloride correspond the Potassium balance. DEB should be within 170 -250.
Protein catabolism will result in more serious effect, therefore, reduce CP % by 0.5-1%.
Addition of Vit C with osmoregulator will reduce dehydration provided there is continuous cool drinking water supply.

Reply
Dr Abdulla Ahmad tahir Dr Abdulla Ahmad tahir
Animal Health Technologist
June 14, 2018
Pranjal Pranbindu Kalita it's huge range deb so specify more accurate figure and is sodium 0.4 enough both from Nacl and nahco3
Reply
June 5, 2018
Dear all,
apart from adittion of Vitamin C, and bicarbonate already mentioned, it is important birds affected by heat stress don't dehydrate and restore the electrolytic balance.
This can be done with the addition in water also of Betaine combined with electrolytes. By this way as betaine is an osmolyte, we can increase water consumption with electrolytes but at the same time retaining water in the animal.

Is is also a good option.

Best regards.
Reply
June 13, 2018
Dear Eduardo, I'm absolutely agree with you. Betaine is excellent osmoprotector, increasing the convenient temperature range for chickens. Betaine prevent cells dehydration.
Reply
Dr Abdulla Ahmad tahir Dr Abdulla Ahmad tahir
Animal Health Technologist
June 14, 2018
Eduardo Marcuello Nice
Reply
June 5, 2018
Thank you so much gentlemen for all your comments and contributions to reduce heat stress on broilers especially during summer time. Indeed, i find your recommendations helpful and will definitely, result to better health of the broilers and better percentage of harvest recovery.
Again, my profound thanks.
Reply
Yusuf Konca Yusuf Konca
Full Professor
June 12, 2018
Heat stress term has been using when the environmental temperature reached up to 28 C. However, some researchers claimed that the environmental temperature lower than 25 C in night and poultry consume enough feed the effects of heat stress may compensate, in contrast to this daytime and night, high temperature may cause heat stress. Some research results also showed that in the hatchery and early life of chicks exposed to a high temperature they may increase the ability to stand to heat stress. Nowadays, broilers growing very fast in a short period about 38 to 42 d. Therefore for broilers, low feed consumption due to heat stress is very important to reach a good BWG for the market. However, laying hens and turkey poults more resistant against to heat stress. Vitamin C in feed and water commonly using for heat stress. However, there are many researches, if no real heat stress, vit C addition to diets is not working and no effectiveness. We should know animals exposure up to 28 C whole day and frequent breathing, low feed consumption and other behaviors.
We should consider heat stress and humidity too. In high humidity together high temperature the animal performance and mortality will increase.
Reply
Miroslav Besermenji Miroslav Besermenji
Veterinary Doctor
June 16, 2018

Yusuf Konca Why consider temperature only?

Reply
Yusuf Konca Yusuf Konca
Full Professor
June 17, 2018
Dear Miroslav Besermenji we can mention it many aspect, not only temperature
Reply
Anjum Khalique Anjum Khalique
Animal Nutritionist
June 18, 2018
Yusuf Konca
Better ventilation is the right solution.
Reply
Hakeem IBRAHIM Hakeem IBRAHIM
Agro Technician
June 20, 2018
Anjum Khalique Right!
Heat stress or effects are not common in all ventilation control sealed houses or shed.
Thank you!
Reply
Asad Ur Réhmàn Asad Ur Réhmàn
Animal Nutritionist
June 26, 2018

You are right but in some areas of Pakistan, we can only reduce the temperature to 29-30 C with maximum possible ventilation. In this situation, we have to look for the alternatives to combat heat stress.

Reply
June 13, 2018
DR.M AKRAM SIR THANK YOU.
Reply
June 13, 2018

Under respiratory alkalosis, there is poor calcium metabolism leading to poor shell formation.
The best way to tackle heat stress is to apply cooling strategies like cold water during the heat hours and external cooling effect like fans, water foggers etc. Betaine, Bicarbonates and Vitamin C works within thermoneutral zone. ExternalTemperatures above thermoneutral zones leads to deaths. Decongesting the birds help a lot. Broilers in cages and deep litters are worst hit. Commercial layers survive best in deep litters than in cages. The only problem they have is low performance because of low feed consumption. Here I suggest a deep litter decongesting pen during the heat months. In Nigeria, heat period are from late February to middle May. White coloured layers better survive heat stress. Brown and black heavyweight layers are vulnerable. Black ones are worst vulnerable. The best is the light breed of layers especially the white ones.

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Aminu Ali Dambatta Aminu Ali Dambatta
President
June 25, 2018
Dr Charles Ibe, what a convincing contribution.
Reply
Nyunt Shwe Nyunt Shwe
Poultry farmer
June 13, 2018

Very good explanation.

Reply
Nyunt Shwe Nyunt Shwe
Poultry farmer
June 13, 2018

I really appreciate it.

Reply
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