A New Approach Using Modeling to Interpret Measured Changes in Soil Organic Carbon in Forests; The Case of a 200 Year Pine Chronosequence on a Podzolic Soil in Scotland

Razauskaite, Rita; Vanguelova, Elena; Cornulier, Thomas; Smith, Pete; Randle, Timothy J.; Smith, Jo

doi:10.3389/fenvs.2020.527549

Cited by 6 publications

(2 citation statements)

References 85 publications

(112 reference statements)

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“…For example, for the control variant, the model predicts the loss of up to 40% of the initial C reserves during the two-year fallow period. Possible significant loss -up to 60% of reserves, previously accumulated by a Podzol under a 200-year-old pine forest in Scotland, was shown using the RothC 26.3 simulation [25]. A noteworthy positive result is the ability of Podzol to maintain the initial SOC reserves at an annual intake of 1.5 t•ha -1 of C and the sequential accumulation of 4‰ at an additional input of 350 kg•ha -1 of C. These trends are practically traced for 30 years after the conservation of the experiment and are reproduced using RothC.…”

Section: Discussionmentioning

confidence: 96%

Arable Podzols are A Substantial Carbon Sink under Current and Future Climate: Evidence From a Long-Term Experiment in Vladimir Region, Russia

Ilichev¹,

Romanenkov²,

Lukin³

et al. 2020

Preprint

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Soil organic carbon (SOC) is an essential condition for soil health and a potential sink for greenhouse gases. SOC dynamics in a long-term field experiment with mineral and organic fertilization on loamy sand Podzol in Vladimir Region, Russia, was traced with the dynamic carbon model RothC since 1968 until the present time. During this period, C stock increased 21% compared with the initial level in the treatment with the application of manure in an average annual rate of 10 t·ha-1. The model was also used to forecast SOC changes until 2090 for two contrasting RCP4.5 and RCP8.5 climatic scenarios. Until 2090, the steady growth of SOC stocks is expected in all compared treatments for both climate scenarios. This rate of growth was the highest until 2040, decreased in 2040-2070 and increased again in 2070-2090 for RCP4.5. The highest annual gain was within 21-27&permil; under RCP4.5 and 16-21&permil; in 2020-2040 in 0-20 cm soil layer. The expected accumulation of C allows increasing current C stock 1.6-1.7 times for RCP4.5 and 2.0-2.2 times for RCP8.5 scenario. Modelling demonstrated potentially more favourable conditions for SOC stability in arable Podzols than in Retisols in Central Russia in the 21st century.

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Section: Discussionmentioning

confidence: 96%

Arable Podzols are A Substantial Carbon Sink under Current and Future Climate: Evidence From a Long-Term Experiment in Vladimir Region, Russia

Ilichev¹,

Romanenkov²,

Lukin³

et al. 2020

Preprint

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show abstract

“…However, we found no significant effect of management option on either total carbon concentration or carbon stock within the mineral soil layers (Table 3). Results from other studies of existing UK forests also find either no, or small, increases in total carbon concentration and carbon stocks over time in upper soil layers (Alton et al, 2007;Benham et al, 2012;Chamberlain et al, 2010;Kirby et al, 2005;Ražauskaitė et al, 2020). Nevertheless, it is striking that there is such little incorporation of carbon into the mineral soils after almost a century of afforestation.…”

Section: Carbonmentioning

confidence: 93%