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China Swine Industry ›› 2026, Vol. 21 ›› Issue (4): 37-47.doi: 10.16174/j.issn.1673-4645.2026.04.007

• Special Report • Previous Articles     Next Articles

Application effects of targeted ventilation system in growing pigsty

LEI Yunfeng1, GONG Jianjun1, ZHU Lin2, LI Jinchuan3, YANG Xuemei1, LIANG Yan1, YANG Kun1, YANG Yuekui1, DU Longhuan1, HE Zhiping1, TAO Xuan1*   

  1. 1Sichuan Animal Science Academy, Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, China; 

    2Mianyang Mingxing Agricultural Technology Development Co., Ltd., Mianyang 621102, China; 

    3Nanmu Equipment & Technology Co., Ltd., Nanchong 637600, China

  • Online:2026-08-25 Published:2026-08-25

Abstract: The temperature, humidity, air quality, ventilation rates, and environmental comfort of gilt houses equipped with a targeted ventilation system were monitored during summer and winter to evaluate its application effectiveness. The results indicated that there was an extremely significant difference in air velocity(P<0.01) at front and rear duct in both summer and winter. The average ventilation rate per pig was 131 m3/h in summer and 33 m3/h in winter, representing a significant reduction compared to traditional longitudinal ventilation systems. During summer, the average indoor temperature and humidity were 28.17℃ and 83.09%, with only 6.5% pigs experiencing mild thermal stress, but no moderate or severe thermal stress. In winter, the average indoor temperature and humidity were 17.62℃ and 56.14%, the pigs were in a comfortable state without cold stress. Concentrations of CO2, NH3, and H2S in summer were all below national standards. In winter, concentrations of NH3 and H2S were lower than national standards, while CO2 concentrations exceeded the national standard but were significantly lower than those in conventional ventilated houses. The targeted ventilation system effectively balanced ventilation and thermal retention requirements through precise air delivery and continuous low-volume operation, thereby improving indoor environmental conditions and enhancing pig comfort during both summer and winter.

Key words: gilt house, targeted ventilation, temperature humidity index, air quality

CLC Number: 

  • S828
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