Author_Institution :
Coll. of Earth Sci., Jilin Univ., Changchun, China
Abstract :
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
Water plays a key role to sustain the stability of wetland and change of water level will influence soil microbial activity and plant growth. In order to investigate the response of aboveground biomass, soil enzyme activities and soil active organic carbon including microbial biomass (MBC), dissolved organic carbon (DOC) and labile organic carbon (LOC) to water gradient in freshwater marsh, the field simulation experiment with soil water level treatments of -5cm (W1), 0cm (W2), 5cm (W3) and 10cm (W4) were carried out under a typical Camagrostis angustifolia marsh of Sanjiang Plain in China. C. angustifolia was shown to be best adapted to the water level of 0 cm, at which its aboveground biomass was the highest and the activities of invertase, amylase, acid phosphatase and urease in this condition were also greater than those in waterlogged soil, moreover waterlogged soils inhibited their activities and the inhibiting effect was enhanced with water level increasing. The influence of water level on MBC was similar to that on enzymes. That is, waterlogging suppressed the growth of microorganism and the content of MBC obviously decreased along with the increase of water level. When the water level was 0 cm, the content of MBC was significantly higher than other treatments (P <;0.05). Nevertheless, the content of DOC and LOC increased as the water level rose. By Pearson analysis, the activities of marsh soil invertase, amylase, acid phosphotase and urease were significant positive correlation with aboveground biom- ss and MBC(P <;0.05), however, negative correlations with the content of DOC and LOC.
Keywords :
microorganisms; organic compounds; soil; vegetation; Calamagrostis angustifolia marsh; China; Sanjiang Plain; aboveground biomass; acid phosphatase; active organic carbon; amylase; dissolved organic carbon; freshwater marsh; invertase; labile organic carbon; microbial activity; microbial biomass; microorganism; plant growth; soil enzyme activity; urease; water level; wetland stability; Biochemistry; Biomass; Carbon; Correlation; Floods; Moisture; Soil;
