A lysimeter study on the effect of temperature on CO2 emission from cultivated peat soils

Abstract

A lysimeter method was evaluated for its suitability in gas emission studies by studying the effect of temperature on CO 2 emissions (dark respiration) from cultivated peat soils. The study was carried out with organic soils from two locations in Sweden, a typical cultivated fen peat with low pH and high organic matter content (Örke) and a more uncommon fen peat with high pH and low organic matter content (Majnegården). A drilling method with minimal soil disturbance was used to collect 12 undisturbed soil lysimeters per site. CO 2 emission was measured weekly from the vegetated lysimeters and the results were compared with data from incubation experiments. The CO 2 emissions measured in the lysimeter experiment were in the same range as those in other studies and showed a similar increase with temperature as in the incubation experiment. With climatic and drainage conditions being similar in the lysimeter experiment, differences in daytime CO 2 emission rates between soils (483 mg ± 6.9 CO 2 m -2 h -1 from the Örke soil and 360 ± 7.5 mg CO 2 m -2 h -1 from the Majnegården soil) were presumably due to soil quality differences. Q 10 values of 2.1 and 3.0 were determined in the lysimeter experiment and of 1.9 to 4.5 in the incubation experiment for Örke and Majnegården respectively. CO 2 emission data fitted well to a semi-empirical equation relating CO 2 emissions to air temperature. The lysimeter method proved to be well suited for CO 2 emission studies.

Partitioning Carbon Dioxide Emission and Assessing Dissolved Organic Carbon Leaching of a Drained Peatland Cultivated with Pineapple at Saratok, Malaysia

“…The CO 2 emission under treatment B was also regulated by moderate temperature fluctuation (Table 2), which is in agreement with previous studies in peat soils [9, 12]. The effect of soil temperature on CO 2 emission from peat soils has been also recently studied by Jauhiainen et al [8] and Paz-Ferreiro et al [37], showing that the rate of organic material decomposition increased with increasing temperature of peat soils.…”

Agricultural abandonment in Mediterranean reclaimed peaty soils: long-term effects on soil chemical properties, arbuscular mycorrhizas and CO2 flux

“…Concerning the C/N ratio, our data are in the value range reported for highly-decomposed cultivated peaty soils (Berglund et al, 2010).…”

Assessment of Land Cover Changes and Their Effect on Soil Organic Carbon and Soil Total Nitrogen in Daqing Prefecture, China

“…Average SOC in Gleysol in China (143 kg m À3 ; Wang and Zhou, 1999;Wang et al, 2000) matches SOC of Gleysol elsewhere (e.g. Sweden; Berglund et al, 2010), but average SOC in Daqing alkaline Gleysol was very much lower, and comparable with degraded Sanjiang Plain Gleysol in the east of Heilongjiang Province (Hao et al, 2007). Wet bogs are C sinks (Koehler et al, 2011), but recently drained bogs are sources of CO 2 because the bryophytes characteristic of bogs are unable to survive persistent drying (Zoltai and Vitt, 1995), which results in decreases in SOC in Gleysol (Salm et al, 2009).…”