| In recent years, the pig production in China has developed very quickly, to become a large-scale intensive form with high density and great benefit and provides most nutrition containing animal proteid for human beings' daily life。Pig production is just a process to transfer forage into meat through the pigs' bodies。 The produce effect depends on not only the pigs' health, descendiblity potential, produce capability, but also the quantity and quality of the forage, management technology and the environmental conditions。 But in modern pig production, the pigs'environmental needs are neglected, and as a result, stress reaction makes the pork quality bad and the production very low, while the pig farms become more larger and intensive。The restrain effect of environment conditions on the level of pig production has been prominence increasingly in intensive systems of animal production and people have been paying attention to it increasingly, so the level of environmental control. has been an important symbol of modern pig production。The high temperature has greatly influenced the production of pig in the summer. The farmer can't product in normal with bad productivity and low feed's reward. Especially in open and semi-enclosed livestock houses over the whole 70 percent all over in China, there are no better cooling methods can be used now.Because of the climate specialty in Chongqing, 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 worldo During the same time, there is not an applicable cooling system in summer in Chognqing。 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 pigs' production, it is necessary to research an high efficiency and cost saving cooling methods..Based on the above condition, this experiment researched the hot and humidity environment of pig house based on different heat insulation materials in Chongqing by utilizing the environment parameters instruments, and found the best cooling methods for the semi-enclosed pig house in summer, and supplied theory proof for environment control and cooling in summer for feedingThrough the primarily research and work, the results were as follows: 1 .The environment temperature and humidity of pig house were measured in real time。 Through analysising and processing the data, it was found that the environment of semi-enclosed pig house in summer in Chongqing was not beneficial to pig production. In July, the highest temperature in pig house was 37°C, the day average temperature was more than 31. 5°C, the day average relative humidity was more than 72%. In August, the highest temperature in semi-enclosed pig house was 36.3 °C, the day average temperature was more than 30. 8°C,the dayaverage relative humidity was more than 70%.,2. Through measuring the temperature of the test point of pig house, 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, 50cm distance, was 31.8°C ,the highest temperature near roof was51. 7°C, the max temperature difference between them was 20. 1 °C, and the max temperature difference between layers was 12. 7°C, the min was 1. l°C。 The level... |
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