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Sammanfattning

Forest soil functions are influenced by interactions among trees, other organisms, and environmental factors such as the soil parent material and climate. Tree productivity and potential for forest C sequestration are currently receiving considerable attention. In boreal forests, plant productivity is commonly limited by the supply of N. Trees and other plants integrate the C and N cycles to form plant organs, which provide organic material for soils and subsequently feed the soil biota. Thus, plant growth has profound impacts on soil and ecosystem biogeochemistry. In this context, the soil C/N ratio is a critical parameter, which can display large variation across forest landscapes. This variation is correlated with forest productivity and other ecosystem functions. The aim of this study was to explore how C/N ratios in boreal forest soils are related to topography, dominant tree species, parent material, and soil texture. This was done by using a spatially-intense dataset of soil C/N ratios which included three sampling depths from 391 forest plots located within a 68 km (2) boreal forest catchment. Hydrological conditions related to topography (i.e., Topographic Wetness Index) demonstrated a significant influence on organic layer C/N ratios (R (2) =0.11, p

Nyckelord

Boreal forest; Forest soils; C/N ratio; Topographic wetness index; Environmental factors

Publicerad i

Forest Ecology and Management
2024, volym: 568, artikelnummer: 122108
Utgivare: ELSEVIER

SLU författare

Globala målen (SDG)

SDG15 Ekosystem och biologisk mångfald

UKÄ forskningsämne

Skogsvetenskap
Markvetenskap

Publikationens identifierare

  • DOI: https://doi.org/10.1016/j.foreco.2024.122108

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/131306