Exchange of trace gases between soils and the atmosphere in Scots pine forest ecosystems of the northeastern German lowlands 1.: Fluxes of N2O, NO/NO2 and CH4 at forest sites with different N-deposition
Exchange of trace gases between soils and the atmosphere in Scots pine forest ecosystems of the northeastern German lowlands 1.: Fluxes of N2O, NO/NO2 and CH4 at forest sites with different N-deposition
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DOI：
10.1016/s0378-1127(01)00725-3
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发表时间：
2002-08-15
影响因子：
3.7
通讯作者：
Papen, H
中科院分区：
文献类型：
--
作者：
Butterbach-Bahl, K;Breuer, L;Papen, H
本文总结了1995-1998年德国东北部低地苏格兰松林土壤与大气之间N2O-N、NO-N、NO2-N和CH4交换速率的测定结果。为了进一步确定大气氮沉降对N和C痕量气体通量的影响，对5个不同大气N输入负荷(每年15~22 kg N ha(-1))的樟子松林地进行了研究。结果表明，与大气中N输入的站点(平均值，NO：3-9mug NO-Nm(-2)h(-1)，N2O：5-10mug N2O-Nm(-2)h(-1))相比，高N影响点(NO：21-39mug NO-Nm(-2)h(-1)，N2O：16-32mug N2O-Nm(-2)h(-1))的NO和N2O通量增加。此外，可以证明，大气氮沉降不仅影响我们研究地点的微量N气体通量，而且还影响森林土壤对大气CH4的吸收程度，因为在大气N沉积中等的松林地点，CH4吸收速率(平均值：-140到-165mug CH4 m(-2)h(-1))大约是大气N输入高的地点(-24到-77 mug CH4 m(-2)h(-1))的两到五倍。(C)2002 Elsevier Science B.V.保留所有权利。
This study summarizes the results obtained from measurements of the exchange rates of N2O-N, NO-N, NO2-N and CH4 between Scots pine forest soils of the northeastern German lowlands and the atmosphere in the years 1995-1998. In order to further identify the effects of atmospheric N-deposition on the magnitude of N- and C-trace gas fluxes, five Scots pine forest sites with different loads of atmospheric N-input (15-22 kg N ha(-1) per year) were investigated. The measurements show an increase in NO and N2O fluxes at the higher N-affected sites (mean values, NO: 21-39 mug NO-N m(-2) h(-1), N2O: 16-32 mug N2O-N m(-2) h(-1)) as compared to the sites with moderate atmospheric N-input (mean values, NO: 3-9 mug NO-N m(-2) h(-1), N2O: 5-10 mug N2O-N m(-2) h(-1)). In addition, it could be demonstrated that atmospheric N-deposition did not only effect N-trace gas fluxes at our study sites, but also the magnitude of atmospheric CH4-uptake by the forest soils, since at the pine forest sites with moderate atmospheric N-deposition CH4-uptake rates were approximately two- to five-fold higher (mean values: -140 to -165 mug CH4 m(-2) h(-1)) than at the sites with high atmospheric N-input (-24 to -77 mug CH4 m(-2) h(-1)). (C) 2002 Elsevier Science B.V. All rights reserved.