| With the development of economy construct and reform opening, stock raising attains the development quickly. The mode of poultry and livestock transforms from feeding freely or feeding separately by farmer in past to factory feeding by breeding company and dimensions feeding by breeding specialization farmer step by step. But after analysising the current situation of feeding pigs, we can draw a conclusion that the production potential don't attain exertion richly and the production level is lower. The reason is that the modern production technics limit some behavior habits and decrease the resistance and immunity, so the require for environment become more and more severe. The better environment factors are the guarantee of the best productivity based on inheritance and feeding methods. In the term of dimensions and intensivism feeding, the environment effect on the production level of feeding pigs turn more and more notability and people have been paying attention to it increasingly, the environment control level has been an important mark on the modernize feeding pigs. Because of the climate specialty on the southern in China, these characters such as the high temperature and high relative humidity and lasted long time in summer are more stand out than the other countries in the same latitude in the world, in the same time, there is not an applicable cooling system in summer in southern China. These characters will effect on the productivity and healthy of pigs seriously, and restrict the production efficiency and increase of productivity level on the southern area. So in order to increase the feeding pigs production , it is necessary to research an high efficiency and cost saving cooling systemfor feeding pigs in southern areaBased on the above condition, this experiment researched the hot and humidity environment of pig house based on different roof materials in southern in China by utilizing the environment parameters auto -testing system and the infrared image system , and found the best cooling system of pig house for southern in summer, and supplied theory proof for environment control and cooling in summer for feeding pigs. Through the primarily research and work, the results were gained:1 .The environment temperature and humidity of pig house were measured in real time by using the environment parameters auto-testing system. Through analysising and processing the data, it was found that the environment of pig house in summer in southern China was not beneficial to pig production. In July, the highest temperature in pig house was 37.8C, the day average temperature was more than 32C, the day average relative humidity was more than 70%. In August, the highest temperature in pig house was 36C,the day average temperature was more than 32C,the day average relative humidity was more than 66%. In September, the highest temperature in pig house was 33.6C, the day average temperature was more than 28 C, the day average relative humidity was more than 65%.2.Through measuring the temperature of the test point of pig house by using the infrared image system, it was found that the temperature distribution in pig house was not uniformity, the temperature difference from roof to floor was bigger, the lowest temperature near the floor, 20cm distance, was 28.6C,the highest temperature near roof was 50.9C, the max temperature difference between them was 22.3C, and the max temperature difference between layers was 14.2C, the min was 0.8C.The level distribution of temperature was that the temperature of middle of pig house was higher than that of near the door or window and near the wall. The temperature in middle of pig house was 0.6C higher than that near the door and windows and was 1.1C higher than that near the wall.3.In the aspect of cooling effective of pig house in summer based on different roof, it was found that the cooling effect of the aluminum foil overshadow screen above the roof was the best. And the same time, the overshadow screen is easy to rebuild and set up on different roof typ... |
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