酸沉降影响下春季庐山森林生态系统水溶态氮的分布及其动态  

Distribution and dynamics of water soluble nitrogen in forest ecosystem of Mt.Lushan under impact of acid deposition in spring

作　　者：董小卫[1] 刘德辉 潘根兴[1] 黄明星[2] 张乐华[2] 石盛莉[1] 孙玉华 

机构地区：[1]南京农业大学农业资源与生态环境研究所,南京210095 [2]中国科学院江西庐山植物园,江西332900

出　　处：《南京农业大学学报》1999年第4期45-48,共4页Journal of Nanjing Agricultural University

基　　金：国家自然科学基金!(49671038)

摘　　要：对1998 年春季庐山森林生态系统中降水、透冠水、茎流水、土壤渗漏水和沟水的水溶态氮(NH+4 -N、NO-3 -N、NO-2 -N) 进行了观测和分析研究。结果表明, 庐山酸雨pH值较1993年升高, 总氮亦有所增加; 系统中氮流通量加大, 输入量大于输出量。土壤尚能有效缓冲大气氮沉降; 氮的输出量中, 以灯台树(Cornusccontroversa)和山胡椒(L.glauca)为主的阔叶林系统多于以日本柳杉(Cryptom eria japonicum ) 为主的针叶林系统; 阔叶林较针叶林更有效地抵抗酸沉降。氮的分布及其动态表明阔叶林生态系统对酸沉降具有较强的缓冲能力。The distribution and dynamics of water soluble nitrogen in forest ecosystem in Mt.Lushan were observed in spring under acid deposition.The samples were collected of rain water,through water,stem water,soil seepage and stream water by the monitoring devices installed in one eco tessera of Cryptomeria japonicum and another of broad leaved dommated by Cornus ccontroversa and L glauca. With the increasing trend of the deposition pH,the total nitrogen deposition increases.N input in Lushan forest ecosystem is over N output,the forest soil can resist N deposition.the broad leaved plants get much better than the coniferous plants in decreasing the acidity of rain water. The nitrogen distribution and dynamics showed the broad leaved forest system has stronger buffering action than coniferous forest system in resistence to acid deposition. ABSTRACT The distribution and dynamics of water soluble nitrogen in forest ecosystem in Mt.Lushan were observed in spring under acid deposition.The samples were collected of rain water,through water,stem water,soil seepage and stream water by the monitoring devices installed in one eco tessera of Cryptomeria japonicum and another of broad leaved dommated by Cornus ccontroversa and L glauca. With the increasing trend of the deposition pH,the total nitrogen deposition increases.N input in Lushan forest ecosystem is over N output,the forest soil can resist N deposition.the broad leaved plants get much better than the coniferous plants in decreasing the acidity of rain water. The nitrogen distribution and dynamics showed the broad leaved forest system has stronger buffering action than coniferous forest system in resistence to acid deposition. The distribution and dynamics of water soluble nitrogen in forest ecosystem in Mt.Lushan were observed in spring under acid deposition.The samples were collected of rain water,through water,stem water,soil seepage and stream water by the monitoring devices installed in one eco tessera of Cryptomeria japonicum an

关 键 词：庐山 森林生态系统 水溶态氮 酸沉降 酸雨 

分 类 号：S718.55[农业科学—林学] X517[环境科学与工程—环境工程]