甘肃省森林区空气负离子分布特征研究

选择了甘肃省7个代表性林区,利用ITC-201A型智能便携式空气负离子测定仪对14种林分类型的空气负离子浓度进行了为期2年的测定与研究。结果显示：①森林空气负离子浓度针叶树种均值为578cm-3,阔叶树种均值为471cm-3;针叶混交林为722cm-3,针阔混交林为661cm-3,阔叶混交林为492cm-3;不同植被类型均值表现为：针叶混交林〉针阔混交林〉针叶树种〉阔叶混交林〉阔叶树种;②各森林区空气负离子浓度铁杉为最大（877cm-3）,冷杉为最小（372cm-3）,14种林分类型表现为：铁杉（Tsuga chinensis（Franch.）Pritz）〉针叶混交林（coniferous mixed forest）〉云杉（Picea crassifolia Kom.）〉针阔混交林（Mixed needle）〉华山松（Pinus armandii Franch.）〉落叶松（Larix gmelinii（Ruprecht）Kuzeneva）〉桦木（Betulasp.）〉杨树（Populussp.）〉油松（Pinus tabulaeformis Carr.）〉阔叶混交林（broadleaf mixed forest）〉栎类（Quercus）〉柏木（Cupressus fune-bris Endl.）〉椴树（Tilia tuan Szyszyl.）〉冷杉（Abies fabri（Mast.）Craib）;③空气负离子浓度与温度成负相关,相关性方程为y=-57.457x＋1486.2（R2=0.9105）,与空气相对湿度成正相关,相关性方程为y=9.3485x-103.57（R2=0.6801）。

Distribution characteristics of negative air ions in forest region of Gansu

This paper selected 7 representative forest regions in Gansu province,and negative air ions concentration of 14 forest types was measured and researched using ITC-201A intelligent portable air ions Tester in two years.The results showed that：① Mean of negative air ions concentration of coniferous forest was 578 cm-3,broadleaf forest is 471 cm-3,coniferous mixed forest was 722 cm-3,mixed needle forest was 661 cm-3,broad-leaved forest was 492 cm-3,means of negative air ions concentration of different vegetation types showed：coniferous mixed forestmixed needle forestconiferous speciesbroadleaf mixed forestbroad-leaved species,② Among forest regions,mean of negative air ions concentration of Tsuga chinensis（Franch.）Pritz was maximum（877 cm-3）,Abies fabri（Mast.）Craib was minimum（372 cm-3）,14 forest types showed：Tsuga chinensis（Franch.）Pritz coniferous mixed forestPicea crassifolia Kom.Mixed needle〉Pinus armandii Franch.Larix gmelinii（Ruprecht）Kuzeneva〉Betula〉Populus〉Pinus tabulaeformis Carr.broadleaf mixed forest Quercus Cupressus funebris Endl.Tilia tuan Szyszyl.Abies fabri（Mast.）Craib,③ Negative correlation was showed between negative air ions concentration and temperature,correlation equation：y=-57.457x＋1 486.2（R2=0.910 5）,and positive correlation was showed between negative air ions concentration and air relative hu-midity,correlation equation：y=9.348 5x-103.57（R2 =0.680 1）.