Rantio-Lehtimäki A, Helander M L, Karhu K
Department of Biology, University of Turku, Finland.
Allergy. 1992 Aug;47(4 Pt 2):388-90. doi: 10.1111/j.1398-9995.1992.tb02077.x.
Pollen of mugwort (Artemisia vulgaris L.) is the most important allergenic pollen in urban areas of south and central Finland in late summer. The purpose of this study was to investigate, experimentally, whether the cutting of mugwort stands affects its airborne pollen concentrations. Experimental plots were either cut (4 plots) or uncut (4 plots) in 2 previous seasons: 4 of them were small (less than 0.5 hectare) and 4 large (greater than 5 hectares). Finally, the plots were divided randomly into 2 groups according to a third variable, cutting in the study season, 1989. Samples were taken on 2 rainless mornings at the peak mugwort flowering time. Two rotorod type samplers were used at heights of 1 and 2 m from ground level, simulating the inhalation heights of children and adults, respectively. The results indicate that cutting mugwort stands significantly reduces airborne pollen concentrations, but the treated areas have to be large, since in the town area there are plenty of mugwort pollen sources. The pollen concentrations at the 2 heights tested did not differ significantly.
艾蒿（Artemisia vulgaris L.）花粉是芬兰南部和中部城市地区夏末最重要的致敏花粉。本研究的目的是通过实验探究割除艾蒿植株是否会影响其空气中花粉浓度。在前两个季节，实验地块分为割除组（4个地块）和未割除组（4个地块）：其中4个地块面积较小（小于0.5公顷），4个地块面积较大（大于5公顷）。最后，根据第三个变量，即1989年研究季节的割除情况，将这些地块随机分为两组。在艾蒿开花高峰期的两个无雨早晨采集样本。使用两个旋转棒式采样器，分别设置在离地面1米和2米的高度，模拟儿童和成人的吸入高度。结果表明，割除艾蒿植株可显著降低空气中花粉浓度，但处理区域必须足够大，因为市区有大量艾蒿花粉源。在两个测试高度处的花粉浓度没有显著差异。
