Long-term effects of site preparation and fertilization on total soil CO2 efflux and heterotrophic respiration in a 33-year-old Pinus taeda L. plantation on the wet flats of the Virginia Lower Coastal Plain

2006 ◽  
Vol 234 (1-3) ◽  
pp. 363-369 ◽  
Author(s):  
Michael C. Tyree ◽  
John R. Seiler ◽  
W. Michael Aust ◽  
David Arthur Sampson ◽  
Thomas R. Fox
Keyword(s):  
Pinus Taeda ◽  
Coastal Plain ◽  
Soil Co2 Efflux ◽  
Heterotrophic Respiration ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Long Term Effects ◽  
Pinus Taeda L ◽  
Lower Coastal Plain

Intensive management modifies soil CO2 efflux in 6-year-old Pinus taeda L. stands

2004 ◽  
Vol 200 (1-3) ◽  
pp. 335-345 ◽  
Author(s):  
Lisa J. Samuelson ◽  
Kurt Johnsen ◽  
Tom Stokes ◽  
Weinlang Lu
Keyword(s):  
Pinus Taeda ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Intensive Management ◽  
Soil Co2 ◽  
Pinus Taeda L

Long-term effects of stand density management and genotype on wood properties of loblolly pine (Pinus taeda L.) in the mid-South USA

2021 ◽  
Vol 491 ◽  
pp. 119176
Author(s):  
Michael A. Blazier ◽  
Thomas Hennessey ◽  
Laurence Schimleck ◽  
Scott Abbey ◽  
Ryan Holbrook ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Density ◽  
Wood Properties ◽  
Long Term Effects ◽  
Stand Density Management ◽  
Pinus Taeda L

scholarly journals Partitioning of soil CO<sub>2</sub> efflux in un-manipulated and experimentally flooded plots of a temperate fen

2012 ◽  
Vol 9 (5) ◽  
pp. 5287-5319
Author(s):  
S. Wunderlich ◽  
W. Borken
Keyword(s):  
Water Table ◽  
Carbon Stock ◽  
Relative Proportion ◽  
Soil Co2 Efflux ◽  
Heterotrophic Respiration ◽  
Co2 Efflux ◽  
Gradual Change ◽  
Soil Co2 ◽  
Rhizosphere Respiration ◽  
Growing Seasons

Abstract. Peatlands store large amounts of organic carbon, but the carbon stock is sensitive to changes in precipitation or water table manipulations. Restoration of drained peatlands by drain blocking and flooding is a common measure to conserve and augment the carbon stock of peatland soils. Here, we report to what extent flooding affected the contribution of heterotrophic and rhizosphere respiration to soil CO2 efflux in a grass-dominated mountain fen, Germany. Soil CO2 efflux was measured in three un-manipulated control plots and three flooded plots in two consecutive years. Flooding was achieved by permanent irrigation during the growing seasons. Radiocarbon signatures of CO2 from different sources including soil CO2 efflux, incubated peat cores and live grass roots were repeatedly analyzed for partitioning of soil CO2 efflux. Additionally, heterotrophic respiration and its radiocarbon signature were determined by eliminating rhizosphere respiration in trenched subplots (only control). In the control plots, rhizosphere respiration determined by 14C signatures contributed between 47 and 61% during the growing season, but was small (4%) immediately before budding. Trenching revealed a smaller rhizosphere contribution of 33% (2009) and 22% (2010) during growing seasons. Flooding reduced annual soil CO2 efflux of the fen by 42% in 2009 and by 30% in 2010. The reduction was smaller in 2010 mainly through naturally elevated water level in the control plots. A 1-week interruption of irrigation caused a strong short-lived increase in soil CO2 efflux, demonstrating the sensitivity of the fen to water table drawdown near the peat surface. The reduction in soil CO2 efflux in the flooded plots diminished the relative proportion of rhizosphere respiration from 56 to 46%, suggesting that rhizosphere respiration was slightly more sensitive to flooding than heterotrophic respiration. We conclude that the moderate decrease in rhizosphere respiration following flooding arises from a gradual change in vegetation in this fen ecosystem.

Sign in / Sign up

Export Citation Format

Share Document