Pigs are warm-blooded animals. It has been reported that the ambient temperature of the air exceeds 28°C. For every 1°C increase, the weight gain of each pig is reduced by 30 grams, and pigs, medium pigs, and large pigs are reduced by 6.8% from the normal daily weight gain. 20% and 28%. It can be seen that adopting a comprehensive regulation strategy in the high temperature season to reduce the impact of high temperature stress on pig growth is one of the core contents of pig production in summer. The stress response of breeding pigs is generally divided into three stages. The first phase, the startle response phase, also known as the adrenal reaction phase, is the early response of the pig after being stimulated by the stressor; the second phase, the resistance phase, if the stressor does not play the leading role, the body overcomes the stress. The harmful effects of the original, and have been adapted, the symptoms of the first phase gradually disappeared, the metabolism tends to be normal, the body's systemic non-specific anti-stress ability is raised above the normal level; the third stage, failure stage, if the stress The original stimulating intensity exceeds the body's anti-stress ability, or the stimulatory effect continues, the metabolism appears irreversible changes, adaptive destruction, and ultimately lead to animal death. Second, the clinical manifestations of high temperature heat stress Pigs have reduced appetite, increased body temperature, lack of energy, rapid heartbeat, shortness of breath, and even hot gasps. The loss of libido in boars has drastically reduced sperm counts and decreased vitality. Empty sows do not have estrus or estrus or are often infertile. Pregnant sows have high embryo mortality and miscarriage. Excessive body temperature in sows may cause premature birth or even death. Nursing sows have low feed intake, low milk production, light weight of piglet weaning, and low survival rate. Third, the comprehensive control of high temperature heat stress 1. According to the appropriate ambient temperature range for pigs at different stages of growth and development, do a good job of preventing heatstroke and cooling, and improve environmental conditions. 1 Strengthen ventilation in pig houses. 2 Reduce thermal radiation, including direct solar radiation and infrared radiation. In order to reduce heat radiation, it is recommended that tall arbors be planted around pig houses, and shading nets be added if necessary. 3 increase the evaporation of pig body heat, although there is no sweat glands in pigs, but can be wetted by the surface to achieve the purpose of evaporation. It is recommended to cool the pigs at the hottest time of the day (conditional spray equipment can be installed, and unconditional pig farmers can use water pipes to cool the big pigs). 4 Newly built pig houses are recommended to install a floor cooling system. This kind of cooling system refers to a conductive cooling method that uses underground water as a medium to lay multiple drainage pipes under the floor of the pig lying area. It is suitable for groundwater sources and can be used to drill wells. Area.
The medical PSA oxygen generator system consists of the air compressor, air-water separation device, dryer, air dew point monitoring device, multi-stage filter, air buffer tank, air moisture monitoring device, oxygen generator, oxygen buffer tank, flow meter, online oxygen monitoring device, cylinder manifold system, smart electric control cabinet, computer monitoring system, remote network monitoring system and optional oxygen booster system.
ETR oxygen generator can produce medical level oxygen with 93%±3% purity and 4bar pressure. The oxygen production capacity for single oxygen generator is 3-100Nm3/h.
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First, the stress reaction process 