To compare the ability of tree species to absorb air pollutants, such as formaldehyde, C2-C5 aldehydes, phenol, NO2, SO2 and O3 the stomatal conductance of various tree species was measured in Toyama prefecture, Japan. Stomatal conductance was measured in the field by using a diffusion porometer during the daytime in the Botanic Gardens of Toyama (31 species) and the Toyama Forestry and Forest Products Research Center (Forest Experiment Station)(16 species), in June 1998 and September 1999.The mean stomatal conductances of the studied trees ranged from 0.07 (Acer japonicum, Osmanthus fragrans, Myricarubra, Camellia hiemails) to 0.25 mol m-2 s-1 (Robinia pseudo-acacia) in the Botanic Gardens of Toyama and 0.07 ( Pasania edalis) to 0.21 mol-2s-1(Hibiscus syriacus, Castanopsis cuspidata ) in the Toyama Forestry and Forest Products Research Center. Robinia pseudo-acacia, Hibiscus syriacus, and Lagerstroemia indica had higher stomatal conductances for deciduous tree species. Castanopsis cuspidata, Cinnamomum camphora , Nerium indicum, and Quercus myrsinaefolia had higher stomatal conductances for evergreen tree species. In both measurement sites, the mean stomatal conductance of deciduous species was higher than that of evergreen species and the mean stomatal conductance in June was higher than that in September for deciduous tree species. The single tree of Zelkova serrata (total leaf area;1000 m2 )in urban areas of Toyama prefecture was estimated to absorb 60mg NO2,82mg O3, 9.7mg SO2, 5.5mg formaldehyde, 2.4mg acetaldehyde in one hour in the daytime.
| 情報源 |
【オンライン情報源1】 環境展望台 全国環境研会誌 - JELA_2701041_2002.pdf 【オンライン情報源2】 環境展望台 全国環境研会誌 27巻1号 【オフライン情報源】 【媒体名称】 【備考】全国環境研会誌 27巻1号, 41-50, (2002) |
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| 配布形式1 |
【交換形式名称】PDF 【版】不明 |
| ファイル識別子 | 88809 |
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| 言語 | 日本語 |
| 文字集合 | |
| 親識別子 | |
| 階層レベル | 非地理データ集合 |
| 階層レベル名 | 全国環境研会誌 |
| 日付 | |
| メタデータ標準の名称 | JMP |
| メタデータ標準の版 | 2 |
