黄土高原腹地千阳不同林分空气负离子分布规律研究  

Distribution Pattern of Air Anion in Different Stands in Loess Plateau

作　　者：李年麒[1] 苏印泉[1] 张楠阳[1] 王蕾[1] 薛白亮[1] 张景群[1] 许喜明[1] 王银福 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]延安市林业局,陕西延安716000

出　　处：《西北林学院学报》2010年第5期24-28,共5页Journal of Northwest Forestry University

基　　金：陕西省日元贷款项目(K332020023);中日NEDO合作项目(K332020908)

摘　　要：用ITC-201A型空气负离子测量仪,在千阳地区森林主要生长季节(4-9月),对千阳县城以南的6个人工林和1个荒地内空气负离子分布规律进行了测定、分析,进而评价空气质量。结果表明,各林分空气负离子浓度具有很大的时空差异性,空气负离子浓度月变化不尽相同,大致呈双峰和单峰曲线变化。在不同林分的主要生长季节(4-9月),不同林分空气负离子平均浓度值也有很大差异。各林分空气负离子平均浓度值由高到低依次为:阴坡刺槐林(928个.cm-3)(阳坡刺槐林(792个.cm-3)(幼龄杨树林(745个.cm-3)(幼龄刺槐林(682个.cm-3)(幼龄杨树侧柏混交林(610个.cm-3)(荒地(522个.cm-3)(幼龄侧柏林(467个.cm-3)。不同季节各林分内空气负离子浓度日变化趋势不同,春季林分中空气负离子浓度变化的稳定性最差。在主要生长季节(4-9月),各林分的空气负离子浓度平均日变异系数大小不同,幼龄侧柏林(0.281)最大,幼龄刺槐林(0.275)次之,幼龄杨树林(0.187)最小。不同林分的空气质量存在较大差异,阴坡刺槐林空气质量最好,幼龄杨树林次之,幼龄侧柏林和荒地空气质量最差。The distribution of negative air ions（NAI） in six forest plantations and one wasteland were measured by using ITC-201A negative air ion monitor during the plant growing season（April-September） in Qianyang County in Loess Plateau to assess the air quality.The results showed that the negative air ions concentration（NAIC） of different stands exhibited great space time differences.NAIC changed in different months so as to form diauxie and unimodal curves.The average NAIC of different forests have also great difference.The average NAIC of different stands were different,and in the order of Robinia pseudoacacia in shady slope（928 ions·cm^-3） 〉R.pseudoacacia in sunny slope（792 ions· cm^-3）〉 young Populus（745 ions· cm^-3）〉 young R.pseudoacacia（682 ions· cm^-3）〉 young Populus and Platycladus orientalis mixed forest（610 ions· cm^-3） 〉wasteland（522 ions· cm^-3） 〉young P.orientalis（467 ions· cm^-3）.Diurnal variations of NAIC were different in different seasons.The changes of NAIC in the spring were most unstable.In the major growing season,diurnal variation coefficients in different stands were different,highest in P.orientalis stand（0.281）,followed by young R.pseudoacacia stand（0.300）,and lowest in young Populus stand（0.187）.Air quality of different stands varied significantly： best in R.pseudoacacia stand in shady slope,followed by young Populus stand,then young P.orientalis stuand and wasteland.

关 键 词：空气负离子 分布规律 空气质量 黄土高原 

分 类 号：S718.512[农业科学—林学]