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Effect of nitrogen addition on soil organic carbon in freshwater marsh of Northeast China.
- Source :
- Environmental Earth Sciences; Oct2013, Vol. 70 Issue 4, p1653-1659, 7p, 4 Graphs
- Publication Year :
- 2013
-
Abstract
- 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) 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 year; low, 6 g N m year; moderate, 12 g N m year; high, 24 g N m year). 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 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18666280
- Volume :
- 70
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Environmental Earth Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 90470931
- Full Text :
- https://doi.org/10.1007/s12665-013-2252-z