Soil-atmosphere exchange of CH4 in response to nitrogen addition in diverse upland and wetland ecosystems: A meta-analysis
Soil-atmosphere exchange of CH4 in response to nitrogen addition in diverse upland and wetland ecosystems: A meta-analysis
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不同高地和湿地生态系统中氮添加对土壤-大气 CH4 交换的影响：荟萃分析
DOI：
10.1016/j.soilbio.2021.108467
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发表时间：
2022-01
影响因子：
9.7
通讯作者：
Liu Guihua
中科院分区：
文献类型：
--
作者：
Wu Junjun;Cheng Xiaoli;Xing Wei;Liu Guihua
活性氮(N)的添加可能通过其对土壤CH4吸收和排放的实质性影响而深刻地影响全球CH4收支。然而，全球范围内土壤对氮素添加的吸收和排放速率的大小和方向仍然不清楚。在这里，为了研究氮添加对不同旱地和湿地生态系统土壤CH4吸收和排放速率的影响，我们合成了一个包含178个研究的878个配对观测的大型数据集。通过这些研究，我们发现，在旱地生态系统中，氮素的添加显著降低了土壤对CH4的吸收速率，而在湿地生态系统中，显著增加了土壤CH4的排放速率。影响的大小取决于生态系统类型。施氮后，自然生态系统(草地生态系统除外)土壤CH4吸收速率的降低和CH4排放速率的增加显著高于农业生态系统。然而，只有在自然生态系统中，土壤CH4吸收速率的减少随着施氮量的增加而增加。此外，与富氮生态系统(亚热带和热带)相比，氮限制生态系统(寒温带和青藏高原)的土壤CH4吸收速率对氮素添加的敏感性较低。此外，与添加无机氮形态相比，有机氮添加对旱地生态系统土壤CH4吸收的降低作用较小，对湿地生态系统土壤CH4排放速率的刺激作用较小。总体而言，我们的结果揭示了不同旱地和湿地生态系统中N添加对土壤CH4吸收和排放速率的影响的大小和方向，并将有助于改进预测N添加引起的土壤CH4通量的生态系统模型。
Reactive nitrogen (N) addition may profoundly impact the global CH4budget through its substantial effects on soil CH4uptake and emission. However, the magnitude and direction of soil CH4uptake and emission rates in response to N addition on a global scale are still unclear. Here, to investigate the effects of N addition on soil CH4uptake and emission rates in various upland and wetland ecosystems, we synthesized a large dataset comprising 878 paired observations from 178 studies. Across these studies, we found that N addition significantly reduced soil CH4uptake rate in upland ecosystems but significantly increased soil CH4emission rate in wetland ecosystems. The magnitude of the effects was ecosystem-type dependent. Following N addition, reduction of soil CH4uptake rate and increase in CH4emission rate were significantly higher in natural ecosystems (with the exception of grassland ecosystems) than in agricultural ecosystems. However, reduction in soil CH4uptake rate increased with N addition rate in only natural ecosystems. Moreover, the soil CH4uptake rate in N-limited ecosystems (cold temperate zone and Tibet Plateau) was less sensitive to N addition compared to N-rich ecosystems (subtropical and tropical zones). Additionally, organic N addition had a lower reduction effect on soil CH4uptake in upland ecosystems and a lower stimulatory effect on soil CH4emission rate in wetland ecosystems compared to the addition of inorganic N forms. Overall, our results shed light on the magnitude and direction of the effect of N addition on soil CH4uptake and emission rates in diverse upland and wetland ecosystems and will help improve ecosystem models for predicting soil CH4flux caused by N addition.
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影响因子：
5.1
作者：
P. Maxfield;E. Hornibrook;R. Evershed
通讯作者：
P. Maxfield;E. Hornibrook;R. Evershed
影响因子：
8.8
作者：
Lihua Zhang;F. Yuan;J. Bai;H. Duan;Xueying Gu;Longyu Hou;Yao Huang;Mingan Yang;Jinsheng He;Zhenhua Zhang;Lijun Yu;C. Song;D. Lipson;D. Zona;W. Oechel;I. Janssens;Xiaofeng Xu
通讯作者：
Lihua Zhang;F. Yuan;J. Bai;H. Duan;Xueying Gu;Longyu Hou;Yao Huang;Mingan Yang;Jinsheng He;Zhenhua Zhang;Lijun Yu;C. Song;D. Lipson;D. Zona;W. Oechel;I. Janssens;Xiaofeng Xu
影响因子：
9.7
作者：
D. Seghers;S. Siciliano;E. Top;W. Verstraete
通讯作者：
D. Seghers;S. Siciliano;E. Top;W. Verstraete
影响因子：
11.6
作者：
Jana Täumer;S. Kolb;Runa S. Boeddinghaus;Haitao Wang;I. Schöning;M. Schrumpf;T. Urich;S. Marhan-
通讯作者：
Jana Täumer;S. Kolb;Runa S. Boeddinghaus;Haitao Wang;I. Schöning;M. Schrumpf;T. Urich;S. Marhan-
影响因子：
11.6
作者：
C. Voigt;R. E. Lamprecht;M. Marushchak;S. Lind;A. Novakovskiy;M. Aurela;P. Martikainen;C. Biasi
通讯作者：
C. Voigt;R. E. Lamprecht;M. Marushchak;S. Lind;A. Novakovskiy;M. Aurela;P. Martikainen;C. Biasi