Effect of nitrogen addition on soil organic carbon in freshwater marsh of Northeast China
| 第一作者： |
宋长春 |
| 英文第一作者： |
Song, C. C. |
| 联系作者： |
宋长春 |
| 英文联系作者： |
Song, C. C. |
| 发表年度： |
2013 |
| 卷： |
70 |
| 摘要： |
Increased nitrogen (N) input to ecosystems could alter soil organic carbon (C) dynamics, but the effect still remains uncertain. To better understand the effect of N addition on soil organic C in wetland ecosystems, a field experiment was conducted in a seasonally inundated freshwater marsh, the Sanjiang Plain, Northeast China. In this study, litter production, soil total organic C (TOC) concentration, microbial biomass C (MBC), organic C mineralization, metabolic quotient (qCO(2)) and mineralization quotient (qmC) in 0-15 cm depth were investigated after four consecutive years of N addition at four rates (CK, 0 g N m(-2) year(-1); low, 6 g N m(-2) year(-1); moderate, 12 g N m(-2) year(-1); high, 24 g N m(-2) year(-1)). Four-year N addition increased litter production, and decreased soil organic C mineralization. In addition, soil TOC concentration and MBC generally increased at low and moderate N addition levels, but declined at high N addition level, whereas soil qCO(2) and qmC showed a reverse trend. These results suggest that short-term N addition alters soil organic C dynamics in seasonally inundated freshwater marshes of Northeast China, and the effects vary with N fertilization rates. |
| 刊物名称： |
Environmental Earth Sciences |
| 参与作者： |
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