Home About Browse Search
Svenska


Effects of fertilization on soil CH4 and N2O fluxes in young Norway spruce stands

Hakansson, Charlotta and Hedwall, Per-Ola and Strömgren, Monika and Axelsson, Magnus and Bergh, Johan (2021). Effects of fertilization on soil CH4 and N2O fluxes in young Norway spruce stands. Forest Ecology and Management. 499 , 119610
[Research article]

[img] PDF
714kB

Abstract

Climate change mitigation strategies have increased the demand for wood products, resulting in an urgent need to increase wood production. One approach is to fertilize forest land, but this can influence greenhouse gas (GHG) fluxes within the ecosystem. The aim of this study was to examine the effects of forest N fertilization on soil CH4 and N2O fluxes in young Norway spruce (Picea abies (L.) Karst.) stands in southern Sweden. The gas fluxes were measured using flow-through non-steady-state dark chambers. In the first, long-term, experiment, half of the stand was fertilized twice (once in 2014 and once in 2016) with 150 kg ha(-1) of N, and gas flux measurements were taken throughout 2014-2017. In the second, dose, experiment, 0, 150, 300, or 450 kg ha(-1) of N was added to the stand in April 2016, and gas flux measurements were taken during April-December 2016. The dose experiment showed that the sink strength of CH4 decreased with increasing amounts of N; the long-term experiment indicated that repeated fertilization decreased the CH4 sink strength over time. Additionally, the long-term experiment indicated that, while significantly higher N2O emissions were recorded in the fertilization years, this was not detected in subsequent years, suggesting the effect to be short-lived. In the dose experiment, fertilization tended to increase the N2O emissions relative to the amount of fertilizer. However, despite the significant effects of fertilization on these GHGs, the summed fluxes were a fraction of the net uptake of C at the sites, as recorded in another study. These findings suggest that fertilizing forest land with commercial NP or NPK fertilizers corresponding to 150 kg ha(-1) of N, the level used in operational forestry in Sweden today, can be conducted without changing CH4 and N2O fluxes to any great extent.

Authors/Creators:Hakansson, Charlotta and Hedwall, Per-Ola and Strömgren, Monika and Axelsson, Magnus and Bergh, Johan
Title:Effects of fertilization on soil CH4 and N2O fluxes in young Norway spruce stands
Series Name/Journal:Forest Ecology and Management
Year of publishing :2021
Volume:499
Article number:119610
Number of Pages:7
Publisher:ELSEVIER
ISSN:0378-1127
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Climate change mitigation, Forest management, GHG, Nitrogen availability
URN:NBN:urn:nbn:se:slu:epsilon-p-113680
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113680
Additional ID:
Type of IDID
DOI10.1016/j.foreco.2021.119610
Web of Science (WoS)000694706000006
ID Code:25490
Faculty:S - Faculty of Forest Sciences
NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(S) > Southern Swedish Forest Research Centre
(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:23 Sep 2021 10:25
Metadata Last Modified:23 Sep 2021 10:31

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits