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.

英文摘要:

刊物名称:

Environmental Earth Sciences

英文刊物名称:

Environmental Earth Sciences

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参与作者:

英文参与作者:

Liu, D. Y.; Song, Y. Y.; Mao, R.