High Methane Uptake from Soils of Low and High Density Radiata Pine Afforestations Compared to Herbaceous Systems

High Methane Uptake from Soils of Low and High Density Radiata Pine Afforestations Compared to Herbaceous Systems

During a one-year period, methane (CH 4 ) fluxes from soil were studied in a southern temperate region system using a static chamber technique. Four treatments on neighboring areas with similar environmental characteristics but different vegetation cover were considered: a natural grassland (NG), an...

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Bibliographic Details
Published in:Journal of sustainable forestry Vol. 40; no. 1; pp. 99 - 109
Main Authors: De Bernardi, María, Priano, María E., Fusé, Victoria S., Fernández, María E., Gyenge, Javier, Guzmán, Sergio A., Juliarena, María P.
Format: Journal Article
Language:English
Published: Philadelphia Taylor & Francis 01-01-2021
Taylor & Francis Ltd
Subjects:
Afforestation
Agricultural industry
Agricultural land
Bulk density
Fluxes
Forestry
Grasslands
Livestock
Methane
Methane uptake
Moisture content
Pine
pine afforestation
Regression analysis
silvopastoral system
Soil temperature
Soil water
static chamber technique
Statistical analysis
Sustainability
Vegetation cover
Water content
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Summary:During a one-year period, methane (CH 4 ) fluxes from soil were studied in a southern temperate region system using a static chamber technique. Four treatments on neighboring areas with similar environmental characteristics but different vegetation cover were considered: a natural grassland (NG), an agricultural land (AL), a low tree density radiata pine afforestation (P1 - suitable for silvopastoral use), and a dense radiata pine afforestation (P2). CH 4 uptake increased in the following order: AL < NG < P1 and P2 (statistically significant differences), without differences between P1 and P2. CH 4 fluxes were mainly influenced by soil water content (R = 0.78; p = .0001) and bulk density (R = 0.75; p = .0004) indicating that CH 4 uptake by soils is primarily connected to methane soil diffusivity. The statistical differences of these parameters could partially justify CH 4 flux differences found among treatments. However, a multiple linear regression analysis indicated that other factors such as soil temperature also control CH 4 fluxes (R 2  = 0.86, p≪4x10 −6 ), and could explain temporal patterns. Results suggest that the low tree density afforestations, suitable for silvopastoral use, have a functional role (CH 4 uptake) similar to that of dense forests, and could be a good option to mitigate CH 4 emissions by livestock and agricultural sector.
ISSN:1054-9811
1540-756X
DOI:10.1080/10549811.2020.1745653