甘肃省森林区空气负离子分布特征研究

Distribution characteristics of negative air ions in forest region of Gansu

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)。

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）.