Impact of Former Peat Extraction Field Afforestation on Soil Greenhouse Gas Emissions in Hemiboreal Region

The reduction of greenhouse gas (GHG) emissions and climate change mitigation are global issues. Peatlands in Europe are widely distributed in the Nordic–Baltic region, and Baltic countries are some of the largest peat suppliers for horticulture in Europe. However, there is no sustainable substitute...

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Published in:Forests 2023-02, Vol.14 (2), p.184
Main Authors: Samariks, Valters, Lazdiņš, Andis, Bārdule, Arta, Kalēja, Santa, Butlers, Aldis, Spalva, Gints, Jansons, Āris
Format: Article
Language:English
Subjects:
Afforestation
Carbon
Carbon dioxide
Carbon sequestration
CH4
Climate change
Climate change mitigation
CO2
Cultivation
Drainage
Emissions
Forestry
Greenhouse effect
Greenhouse gases
Groundwater
Horticulture
Land use
Land use management
Methane
Nitrous oxide
Peat
Peatlands
Pine trees
Pinus sylvestris
re-cultivation
Regression analysis
Trees
Vegetation
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Summary:The reduction of greenhouse gas (GHG) emissions and climate change mitigation are global issues. Peatlands in Europe are widely distributed in the Nordic–Baltic region, and Baltic countries are some of the largest peat suppliers for horticulture in Europe. However, there is no sustainable substitute for peat in the horticulture industry. Therefore, it is necessary to identify suitable re-cultivation types for former peat extraction fields, because knowledge about the effect of re-cultivation on annual carbon and GHG budgets is limited. Ecosystem GHG (CO2, CH4, N2O) exchange measurements, environmental parameter assessment and sampling in the study were conducted in a hemiboreal vegetation zone for 24 consecutive months in former peat extraction fields with different re-cultivation management strategies (land use types). The aim of the study was to assess the influence of diverse re-cultivation management strategies on the GHG emissions of former peat extraction fields. The most suitable re-cultivation management is afforestation with Scots pine (Pinus sylvestris) in order to obtain the lowest annual CO2eq values and ensure additional carbon sequestration in living tree biomass. The developed linear mixed-effect models showed a good model fit (R2CO2 = 0.80, R2CH4 = 0.74) for the analyzed land use types, and thus can be used for CO2 and CH4 emissions estimation.
ISSN:1999-4907
1999-4907
DOI:10.3390/f14020184