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论文题目: |
Effect of nitrogen addition on soil organic carbon in freshwater marsh of Northeast China |
英文论文题目: |
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. |
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发表年度: |
2013 |
卷: |
70 |
期: |
4 |
页码: |
1653-1659 |
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. |
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刊物名称: |
Environmental Earth Sciences |
英文刊物名称: |
Environmental Earth Sciences |
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英文参与作者: |
Liu, D. Y.; Song, Y. Y.; Mao, R. |
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