Showing posts with label wallow pool. Show all posts
Showing posts with label wallow pool. Show all posts

Thursday, February 18, 2016

HOW TO HANDLE HEAT STRESS IN PIGS.

Heat stress affects the pig industry in tropical climates as well as temperate regions. Losses due to heat stress include nonproductive days for sows and economic losses in growing-finishing pigs. Even in mild climate conditions such as the Netherlands pigs have problems in the summer with performance losses due heat stress .This problem can be dealt with by improved nutrition. Pigs are much more sensitive to hot weather than other livestock animals – largely due to the fact that pigs hardly sweat and their lungs are relatively small compared to their body size. When pigs are exposed to heat stress, their respiration rate increases, pulse rate falls, they start panting heavily and they stop eating because this contributes to further heat production. The fact that bigger pigs are more sensitive to heat stress can be clearly seen in growth performance. Investigation of different weight classes (75, 80 and 28 kg body weight) showed a direct negative correlation on average daily gain (ADG) with increasing room temperature. While 75 kg pigs start to decrease their ADG at around 23°C, pigs weighing 25 kg can compensate up to 27°C (Langridge, Western Australia, 2014). A commonly accepted temperature range for sows in the farrowing house typically spans between 21°C and 25°C - though this is too big of a range. Nursery sows begin to show signs of heat stress starting at 22°C . The feed intake drops almost 0.5 kg/day as temperature increases to 25°C. Technical solutions to reduce heat stress are often time 
consuming and can be highly expensive, e.g. building cooled stables. A nutritional approach can prove more adaptable and quicker to implement. Based on current knowledge there are some measures we can take to improve the swine productivity during periods of heat stress. The nutritional intervention include; 1) Smaller, more frequent meals per day and/or night feeding. 2)A sufficient supply of fresh, clean water. 3)Wet the feed with water. 4)Use pelleted feed instead of mash. 5)Lower crude protein. 6) Replace starch with fat as an energy source. 7) Use less fiber. Story from materials from pig progress.

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