猪舍不同通风模式对空气质量及猪只健康的影响

doi:10.12160/j.issn.1672-5190.2023.02.012

Abstract

Abstract:

[Objective] The aim of this study was to explore the effects of two ventilation modes on air quality and swine health in pigsty under the background of normalized control of African swine fever outbreak. [Method] A total of 1 280 binary castrated finishing pigs with body weights of 44 to 45 kg were randomly divided into a control group （longitudinal ventilation） and an experiment group （filter-typed vertical and three-dimensional ventilation） with 640 pigs in each group. The concentrations of harmful gases, microparticles and microbial aerosol in the pigsty of the two groups were routinely detected daily during the 28 d continuous monitoring. The titers of antibodies against swine fever virus, pseudorabies virus, porcine circovirus, porcine reproductive and respiratory syndrome virus, and Mycoplasma hyopneumoniae in the swine herd were detected by ELISA assay. PCR was used to identify the viral pathogens. Feces and dust samples from the pigsty environment were collected for the insolation of Streptococcus, Haemophilus parasuis and Mycoplasma pneumonia. [Result] Compared with the control group, the concentrations of the harmful gases of NH₃ and H₂S in the experiment group decreased by 46.52% and 48.55%, respectively, with extremely significant （P<0.01） differences. The concentrations of the microparticles of PM_2.5 and PM_1.0 decreased by 62.30% and 67.48%, respectively, with extremely significant （P<0.01） differences. The concentration of the microbial aerosol in the experiment group extremely significantly （P<0.01） decreased by 54.33%. With extremely significant （P<0.01） differences, the positive rates of antibodies against porcine reproductive and respiratory syndrome virus and Mycoplasma pneumoniae increased by 29.97% and 26.64%, respectively. The number of pathogenic bacteria in the experiment group was prominently lower than that in the control group. [Conclusion] The deployment of filter-typed vertical and three-dimensional ventilation system in pigsty significantly improves the air quality and the health status of the pig herd. The results obtained in this study provide references for exploring safe and reliable ventilation modes.

Key words: vertical and three-dimensional ventilation system, harmful gas, mircoparticles, microbial aerosol, swine health

CLC Number:

S828.46

BAI Hongjie,YAN Xiangzhou,FAN Lei,WANG Jing. Effects of Different Ventilation Modes on Air Quality and Swine Health in Pigsty[J]. Animal Husbandry and Feed Science, 2023, 44(2): 72-80.

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References 34

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Effects of Different Ventilation Modes on Air Quality and Swine Health in Pigsty

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