中文摘要：

弹尾虫是土壤动物中一个重要类群,体型小、分布广泛.样点位于小兴安岭森林生态系统定位研究站,采用Tullgren干漏斗法分离弹尾虫并进行鉴定与数据分析.共得到弹尾虫标本1 050个,隶属于7科,分别为棘（虫兆）科、球角当科、疣泡科、等角（虫兆）科、长角（虫兆）科、鳞（虫兆）科和拟亚（虫兆）科.其中,优势类群为棘（虫兆）科、球角（虫兆）科、疣（虫兆）科和等角（虫兆）科,常见类群为长角（虫兆）科和鳞（虫兆）科,稀有类群为拟亚（虫兆）科.结果表明,从未施氮到高氮处理下,弹尾虫个体总数量呈现出逐渐减少的趋势.在低氮及高氮处理下,弹尾虫数量逐渐减少;而中氮处理下,Ⅱ层数量增多,出现拐点.在低、中、高氮处理下,Ⅲ、Ⅳ层个体数量减少,甚至为0,呈现出明显的表聚性.

英文摘要：

Collembola are small important soil animals, small in size, distributed widely. In this paper, the sampling site in Forest Research Center in Xiaoxingan Mountains were hosed. Tullgren method was used to separate the specimens. In total, there are 1 050 specimens belonging to 7 families. They are Onchiuridae, Isotomidae, Neanuridae, Hypogastruridae, Entomobryidea, Tomoceridae and Pseudachorutidae. Among them, Onchiuridae, Isotomidae, Neanuridae, Hypogastruridae are dominant groups, Entomobryidea and Tomoceridae are common groups, while Pseudachorutidae is the rare group. It shows that from CK to high concentration of nitrogen, individual number of Collembola decreased gradually. Under low and high nitrogen treatment, individual number of Collembola decreased, but under medium nitrogen deposition, that of II （0-5 cm） was the highest. Under different treatments, individual number of III （5-10 cm） and IV （10--15 cm） decreased in a gradual way, even dropping to zero. It shows Collembola＇ s preference for going to surface.