Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2018.10.015 |
Long-term effect of fertilization on the greenhouse gas exchange of low-productive peatland forests | |
Ojanen, Paavo1,2; Penttila, Timo2; Tolvanen, Anne3,4; Hotanen, Juha-Pekka5; Saarimaa, Miia3; Nousiainen, Hannu2; Minkkinen, Kari1 | |
2019-01-15 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2019 |
卷号 | 432页码:786-798 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland |
英文摘要 | Drainage of peatlands for forestry often leads to carbon dioxide (CO2) net emission from soil due to loss of peat. This emission can be compensated for by the increased tree growth. Hovewer, many drained peatlands have low tree growth due to nutrient limitations. Tree growth at these peatlands can be effectively increased by fertilization, but fertilization has been also found to increase decomposition rates. We studied the long-term effect of fertilization of low-productive forestry-drained peatlands on the complete ecosystem greenhouse gas exchange, including both soil and tree component, and accounting for CO2, methane and nitrous oxide. Five N-rich study sites (flark fens and a rich fen) and one N-poor ombrotrophic site were established. Fertilization had started at the study sites 16-67 years before our measurements. Fertilization considerably increased tree stand CO2 sink ( + 248-1013 g CO2 m(-2) year(-1)). Decomposition increased on average by 45% ( + 431 g CO2 m(-2) year(-1)) and litter production by 38% ( + 360 g CO2 m(-2) year(-1)). Thus, on average 84% of the increased decomposition could be attributed to increased litter production and 16% to increased soil CO 2 net emission due to increased loss of peat. Soil CO2 net emission correlated positively with water table depth and top soil N concentration. Fertilization increased soil CO2 net emission at the drained flark fens on average by 187 g CO2 m(-2) year(-1). At the rich fen, net emission decreased. The N-poor bog exhibited soil CO2 sink both with and without fertilization. Effects on methane and nitrous oxide emissions were small at most sites. The increase in tree stand CO2 sink was higher than the increase in soil CO2 net emission, indicating that fertilization has a climate cooling effect in the decadal time scale. Yet, as the fertilized plots at N-rich sites exhibited soil CO2 source or zero balance, continuation of fertilization-based forestry over several rotations would lead to progressive loss of ecosystem C. At the N-poor bog, fertilization-based forestry may have a climate-cooling effect also in the centennial time scale. |
英文关键词 | Fertilization Greenhouse gas exchange Peatland forest Methane Carbon dioxide Nitrous oxide |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455068700076 |
WOS关键词 | WATER-LEVEL DRAWDOWN ; FINE-ROOT PRODUCTION ; WOOD ASH APPLICATION ; SCOTS PINE ; SOIL RESPIRATION ; DRAINED PEATLANDS ; BIOMASS EQUATIONS ; METHANE FLUXES ; CARBON BALANCE ; NORWAY SPRUCE |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22100 |
专题 | 气候变化 |
作者单位 | 1.Univ Helsinki, Dept Forest Sci, POB 27, FI-00014 Helsinki, Finland; 2.Nat Resources Inst Finland, Latokartanonkaari 9, FI-00790 Helsinki, Finland; 3.Univ Oulu, Nat Resources Inst Finland, POB 413, FI-90014 Oulu, Finland; 4.Univ Oulu, Dept Genet & Ecol, FI-90014 Oulu, Finland; 5.Nat Resources Inst Finland, Yliopistokatu 6, FI-80100 Joensuu, Finland |
推荐引用方式 GB/T 7714 | Ojanen, Paavo,Penttila, Timo,Tolvanen, Anne,et al. Long-term effect of fertilization on the greenhouse gas exchange of low-productive peatland forests[J]. FOREST ECOLOGY AND MANAGEMENT,2019,432:786-798. |
APA | Ojanen, Paavo.,Penttila, Timo.,Tolvanen, Anne.,Hotanen, Juha-Pekka.,Saarimaa, Miia.,...&Minkkinen, Kari.(2019).Long-term effect of fertilization on the greenhouse gas exchange of low-productive peatland forests.FOREST ECOLOGY AND MANAGEMENT,432,786-798. |
MLA | Ojanen, Paavo,et al."Long-term effect of fertilization on the greenhouse gas exchange of low-productive peatland forests".FOREST ECOLOGY AND MANAGEMENT 432(2019):786-798. |
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