challenge of heat stress is not as acute as in many other countries. However, the local industry, especially broiler integrators located in Southern Russia and even Siberia, where the climate is more continental, are using a combination of various techniques [to deal with this issue],” Davleyev says. “The most popular, effective, and cost-saving method are increasing the airflow in a poultry house to a minimum of 2 meters per second. Installing micro-sprinklers for water mist is also highly effective, though more expensive, requiring special equipment along with increased water usage. Some farms reduce the feed supply of the flocks in hot weather,” Davleyev adds.
Feed management “Changes in feed supply indeed are a popular method of dealing with heat stress in southern regions,” agreed Nikolay Buryakov, Ph.D., Head of the Department of Feeding and Breeding of Animals, Federal State Budgetary Educational Institution of Higher Education. “Producers see that heat stress is impacting animal behaviour, their feed intake, pairing ability, and other things, and point to increasing attention to ensuring the temperature conditions are optimum.” “Russia is a northern country with a cold climate, so in
chicken and pork production – money is spent on protection from the cold rather than on protection from the summer heat. In summer, high temperatures are a problem, mainly in the southern regions of European Russia, where the heat may not subside at night. In such cases, mortality in poultry and pig farms can increase by 5-7%. Weight gain also drops by 5-10%,” estimates Andrey Dalnov, head of the centre of industry expertise of the Russian bank Rosselhozbank.
Feeding solutions have a controversial image “Russian farmers are somewhat reluctant to use feed additives to deal with heat stress,” Vadim Barnev, technical director of cattle division of the Russian feed additives distributor Mustang Feeding Technologies told local news outlet MilkNews. “Due to heat stress, cows have no appetite. The animals consume mostly concentrated feed, resulting in a decrease in the rumen pH and acidification. One of the ways to prevent it is by using buffer mixtures to optimise pH. The second is using various herbal extracts to increase feed intake by animals exposed to heat stress. Also, the producers offer various biological substances – probiotics and strains. However, from the feeding point of view, none of these methods is backed by science,” Barnev says.
▶ HEAT STRESS | MAY 2021 57
Heat stress affects growth rate in the Russian pork and poultry industry.
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