Heat stress in poultry

a good article .pls guide me the airflow rate standards for broilers and layers in tunnel ventilated house.
also in layers in negative pressure ventillation there is a temperature variation in the cages from top to bottom,how to manage such a condition.
lastly few steps to avoid delayed oviposition.

Dear Dr.Narsapur,

Very informative article On heat stress managment in poultry.
Nicely explained effect of heat stress & its prevention.
Regarding Nutritional managment
Chromium also has effect on reducing the cortisol (Stress hormone) level there by reducing stress and improving the glucose utilization. Organic Chromium -such as Chromium propionate with Vitamin C has synergistic effect on reducing the heat stress and improving immunity, nutrient utilization & production. Feed additives such as Cr + Vitamin C will have greater effect during summer/stress period.

Thanks and regards
Dr.Thirumeignanam

Here is very good basic informations about heat stress in poultry. plz guide me for use of exogenous enzyme supplementation during heat stress in poultry particularly in case of japanese quail .
thank you.

Dear Dr V.S.Narsapur. Very important article.

Please, could I know your opinion on livestock breeders (heavy type con (spec Bredd Brahma)? 

How to solve this problem. Do you have any recommendations, for example, which added to the feed.
What is your opinion Sodium bicarbonate 25-30 ° C 0,05% - 30-40 ° C 0.1%)
in chicken rearing period to the time of reproduction. - production of hatching eggs.
I solve this issue for my honorable friend ( hobby breeds) in Kuwait.
Thanks you from SSlovakia.

To me, all medicines have limited role when shed temperature is above 38 degree celsius. Heat-stressed bird if immediately withdrawn and given drop of paracetamol plus glucose and given deep water bath survives but lays eggs after 4 days sprinklers versus no sprinklers or foggers versus no foggers inside sheds have no difference in mortality at 38 degree celsius.

We tried chromium , paracetamol vit c 300 gms per ton ammonium chloride 500 gms per ton sodium chloride 2.5 kg per ton it seems keeping low water temp, proper flushing, proper ventilation and using channels replacing nipples all were beneficial at moderate temp of 35 degree celsius but keeping shed cool better ventilation maintaining water temp were better with low density of birds . It is also important to observe how many birds are being reared per acre and not per box. It is also important density of birds in per sq km.
Type of infrastructure eg single shed or double storey shed with rcc or asbestos, availability of insulation or not all management things matter more than chemicals or drugs.

Can I give vit c and acetylsalicylic acid from 6am to 6pm (only in the heat stress moment)?