Response Of The Larvae Of The Broad-leaved Korean Pine Forest To Nitrogen Deposition In Xiaoxing'an Mountains

Research was done under artificial nitrogen deposition in Xiaoxingan ling Mountains from May to September in 2014.The results are as follows:1.In total,there are 3430 specimens collected,belonging to 14 genera,7 families.Among them,the dominant groups are Isotomidae,Onychiuridae and Hypogastruridae.The common group is Neanuridae.And the rare groups are Entomobryidae and Tomoceridae.In addition,the most rarest group is Sminthuridae.From the group number,there are 5 families in spring,7 faimiles in summer and 6 families in autumn.In different seasons,Isotomidae and Onychiuridae are dominant groups,while Neanuridae is the common group.The main difference shows up in rare group.2.In the experiment under nitrogen deposition,from the 3 dominant groups,in spring,for Isotomidae TM is dominant compared with CK,TL and TH.For Onychiuridae,TM is dominant compared with TL and TH.In Hypogastruridae,TM is dominant with that of CK.In total,TM is dominant compared with CK,TL and TH.In summer,TH is dominant with CK and TM,while in Onychiuridae and Hypogastruridae,there is no big difference.In total,it shows diffrence between TH and TM and TL.In autumn,there is no big difference in the 3 dominant groups.But in Tomoceridae,it is dominant in CK and TL,TM and TH.The dynamics of number in CK,TL and TH are increase then decrease from spring to autumn,but in TM it shows successively decrease.3.In different seasons,the individuals are the most in summer,least in autumn.The total number is highest under TM,lowest in TH in spring and autumn.In spring,individual number of TL is slightly lower than CK.In autumn,the number is a little bit more in TL than in TM.4.The litter layer is significiant compared with others in different seasons in 2014.