楼房养猪模式下楼层对育肥猪舍内空气质量的影响

doi:10.16174/j.issn.1673-4645.2026.04.008

Abstract

Abstract: Under the fully enclosed multi-story pig raising mode, the indoor barn environment directly affects pig health, production performance and animal welfare. This study explored the effects of floor differences on diurnal variations of environmental conditions in finishing pig barns via continuous long-term monitoring throughout a whole day. Four common indicators, namely carbon dioxide (CO2), ammonia (NH3), air temperature and relative humidity, were continuously monitored at 1-minute intervals in finishing barns on the bottom, middle and top floors, with the monitoring period covering from 15:30 to 07:30 the next morning. The results showed that the air temperature followed the sequence: bottom floor > top floor > middle floor. This phenomenon was probably related to the smaller number of pigs raised on the middle floor as well as differences in floor height. The relative humidity on the top floor was higher than that on the middle and bottom floors, which may be caused by the water curtain used for waste gas treatment on the top floor. Carbon dioxide concentration decreased as time elapsed, and ammonia concentration exhibited a similar declining trend, while discrepancies existed among different floors. Overall, concentrations of both CO2 and NH3 were higher on the bottom floor than on the top floor, which was speculated to be associated with the ventilation design of the top floor. Pigs have lower activity levels at night and impose less interference on the barn micro-environment; therefore, nighttime is more suitable for research concerning spatiotemporal variations of environmental data. This study clarified the spatiotemporal change patterns of environmental parameters in finishing pig barns, and provides a reference for precise environmental regulation in multi-story pig farms.

Key words: multi-story pig farm, environment, temperature, relative humidity, carbon dioxide, ammonia

CLC Number:

S828

GUI Chuchen, WU Ruiting, WANG Yan, DENG Jinping, ZHANG Lingna, LIU Xiangdong. Effects of different floors on indoor air quality in finishing pig barns of multi-story pig farms[J].China Swine Industry, 2026, 21(4): 48-56.

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Effects of different floors on indoor air quality in finishing pig barns of multi-story pig farms

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