北海市空气微生物含量时空分布

于１９９６／１９９７年之交研究了广西北海市空气微生物含量及其分布特征，结果表明北海市室外空气细菌、真菌及总微生物含量分别为５７０９．７ＣＦＵ／ｍ３、１８４７．１ＣＦＵ／ｍ３和７５５６．８ＣＦＵ／ｍ３。已超过了相关规定的轻度空气污染程度。客房空气质量较好。空气微生物含量显出的测点差意味着北海市闹市区空气质量一般差于非闹市区，随离陆地采样高度的抬升，空气微生物呈减少之势，其昼夜变化特征表现出空气细菌及总量在下午达峰值，上午次之，晨间为谷，而空气真菌在中午峰值之前出现低谷。空气细菌、空气真菌和空气微生物总量与气温间分别有显著正相关关系。北海市空气微生物含量变化显出不全同于我国一些亚热带或内陆城市的势态。

Spatial and Temporal Distributions of Air Borne Microbes above Beihai City

The air borne microbial contents above Beihai city,Guangxi and distribution were researched between the years of 1996 and 1997. The results show that the contents of outdoor air borne bacteria,fungi and total microbes were 5709.7,1847.1 and 7556.8 CFU/m³, respectively,which have exceeded the limit of lighter air pollution.The indoor air quality of the guest rooms in hotels monitored was pretty well.The differences of air borne microbial contents as monitored in different sampling sites imply that the downtown air quality is worse than the uptown in Beihai.It appears that the air borne microbial count decreases with the rise in the night.The characteristics of the diurnal variation show that contents of air borne bacteria and total microbes reached their peaks in the afternoon,took second place in the late morning,and lowest in the early morning.But before noon peak level of air borne fungi content is lowest.There were significant positive correlations between the contents of air borne bacteria,fungi and total microbes, and air temperatures respectively.The content changes in air borne microbes above Beihai city show a distinct tendency from those shown in some subtropic or interior cities in China.