Laying hen houses are a known source of fine particulate matter (PM₁₀), but no information is available on the contribution of outdoor runs to the overall emissions. This study aims to investigate some of the main factors driving PM emissions from outdoor runs. A wind tunnel device was built to assess the effect of hen density (HD, hens m⁻²) on PM emissions from outdoor runs. Moreover, a laboratory trial, using a soil resuspension chamber, was conducted to describe the influence of soil moisture on the emissions. The gathered information was then used to estimate PM₁₀ emissions over a 1-year period. PM emissions increased exponentially with increasing HD and decreased exponentially with increasing soil water content. The average PM₁₀ emissions from hen activities at the study farm, estimated using meteorological data from year 2019, were of 8.9 mg hen⁻¹ d⁻¹. This emission is much lower than those reported by previous studies for indoor hens rearing.

蛋鸡舍是细颗粒物 (PM ₁₀ )的已知来源，但没有关于户外跑步对总排放量的贡献的信息。本研究旨在调查推动户外跑步 PM 排放的一些主要因素。建立了一个风洞装置来评估母鸡密度（HD，母鸡 m ^-2）对室外跑步 PM 排放的影响。此外，还进行了使用土壤再悬浮室的实验室试验，以描述土壤水分对排放的影响。然后使用收集到的信息来估算1 年期间PM _{10 的}排放量。PM 排放随着 HD 的增加呈指数增加，随着土壤含水量的增加呈指数下降。平均 PM ₁₀使用 2019 年的气象数据估计，研究农场母鸡活动的排放量为 8.9 毫克母鸡^-1 d ^-1。这种排放量远低于以前的室内母鸡饲养研究报告的排放量。