- Volume 28 Issue 3
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Environmental Analysis in the Windowless Laying Hen Houses
무창산란계사의 환경분석에 관한 연구
- Hongwei Xin (Dept. of the Agricultural and Biosystems Engineering, Iowa State University in USA) ;
- Yi Liang (Dept. of the Agricultural and Biosystems Engineering, Iowa State University in USA)
- 이성현 ;
- Published : 2003.06.01
This study was carried out to analyze the environmental variation of layer house at Iowa State in the USA. The analyzed seasons for this study were summer and winter. Analyzing factors are inside temperature and relative humidity, carbon dioxide concentration, ammonia concentration and emission. All factors were collected every 30 second from each house with portable monitoring units. In this study, two types of laying hen houses were monitored at the same season. One was a manure belt house, the other was a high-rise house. In order to estimate the ventilation rates of the laying hen houses, carbon dioxide concentration balance was used in this study. Ammonia concentrations and emission rates of the manure belt house are much lower than those of the high rise house. Daily mean ammonia concentrations in the manure belt house and high-rise house ranged from 3 to 7 ppm and 5 to 34 ppm, respectively. The daily ammonia emission rates averaged 0.68g/h
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