National Experimental Teaching Demonstration Center of Animal Science, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China.
National Experimental Teaching Demonstration Center of Animal Science, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China.
Environ Pollut. 2019 Jul;250:746-753. doi: 10.1016/j.envpol.2019.04.086. Epub 2019 Apr 17.
Air pollutants accumulated in confined livestock barns could impact the health of animals and staff. Particulate matter (PM) and ammonia (NH) concentrations are typically high in enclosed livestock houses with weak ventilation. The objective of this study was to investigate the distribution of PM in different size fractions and the levels of NH in a high-rise nursery (HN) barn and a high-rise fattening (HF) barn on a swine farm and to analyse the physicochemical properties of fine PM (PM, PM with aerodynamic diameter ≤ 2.5 μm). The concentrations of total suspended particles (TSP, PM with aerodynamic diameter ≤ 100 μm), inhalable PM (PM, PM with aerodynamic diameter ≤ 10 μm), PM and NH were monitored continuously for 6 d in each barn. The results showed that the concentrations of PM and NH varied with position, they were significantly higher inside the barns than outside (P < 0.01) and significantly higher in the forepart than at the rear of the two barns (P < 0.05). In the HF barn, the values of the two parameters were 0.777 ± 0.2 mg m and 26.7 ± 7 mg m, respectively, significantly higher than the values observed in the HN barn at all monitored sites (P < 0.05). The PM concentrations increased markedly during feeding time in the two barns. Chemical characteristics analysis revealed that the main sources of PM in the two barns may have consisted of blowing dust, feed, mineral particles and smoke. In conclusion, the air quality at the forepart was worse than that at the rear of the barns. Activities such as feeding could increase the PM concentrations. The components of PM in the two barns were probably blowing dust, feed, mineral particles and smoke from outside.
畜舍内积聚的空气污染物可能会影响动物和工作人员的健康。通风不良的封闭式畜舍中，颗粒物（PM）和氨（NH）浓度通常较高。本研究的目的是调查 PM 在不同粒径段的分布情况以及一栋高层保育舍（HN 舍）和一栋高层育肥舍（HF 舍）中 NH 的水平，并分析细颗粒物（PM，空气动力学直径≤2.5μm 的颗粒物）的物理化学性质。在每个畜舍中，连续 6d 监测总悬浮颗粒物（TSP，空气动力学直径≤100μm 的颗粒物）、可吸入颗粒物（PM，空气动力学直径≤10μm 的颗粒物）、PM 和 NH 的浓度。结果表明，PM 和 NH 的浓度随位置而变化，畜舍内的浓度明显高于畜舍外（P<0.01），且在两个畜舍的前部显著高于后部（P<0.05）。在 HF 舍中，这两个参数的值分别为 0.777±0.2mg·m 和 26.7±7mg·m，均显著高于在所有监测点的 HN 舍中的值（P<0.05）。在两个畜舍中，喂食期间 PM 浓度显著增加。化学特征分析表明，两个畜舍中 PM 的主要来源可能包括扬尘、饲料、矿物质颗粒和烟雾。总之，畜舍前部的空气质量比后部差。喂食等活动可能会增加 PM 浓度。两个畜舍中 PM 的成分可能是扬尘、饲料、矿物质颗粒和来自外部的烟雾。
