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Effects of whole-tree harvesting at thinning and subsequent compensatory nutrient additions on carbon sequestration and soil acidification in a boreal forest

Lim, Hyungwoo and Olsson, Bengt and Lundmark, Tomas and Dahl, Jenny and Nordin, Annika (2020). Effects of whole-tree harvesting at thinning and subsequent compensatory nutrient additions on carbon sequestration and soil acidification in a boreal forest. GCB Bioenergy. 12 , 992-1001
[Journal article]

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Abstract

Residues from forest harvesting operations may be utilized as a renewable energy source. However, the sustainability of this practice has been questioned due to the losses of nutrients and exchangeable base cations, which may impair the forest's carbon sequestration capacity and lead to soil acidification. We report the 18 year response of biomass growth, soil carbon stock and soil chemistry to whole-tree harvest at thinning and associated compensatory measures in aPinus sylvestrisforest in northern Sweden. The whole-tree harvest at thinning was combined with nutrient additions to compensate for the nutrient loss caused by extracting the residues. Four main treatments, stem-only thinning, whole-tree thinning, whole-tree thinning with one-time nitrogen fertilization and whole-tree thinning with repeated nitrogen fertilization every third year were applied, with plots split for wood-ash treatment. Eighteen years after the treatments, whole-tree thinning that had removed 3.0 +/- 0.2 Mg C/ha in residues had no effect on forest growth, soil carbon and nitrogen stocks or soil chemistry. Both nitrogen fertilization regimes increased biomass growth, but neither one resulted in a significant increase in soil carbon stock. Wood-ash addition increased soil pH and exchangeable base cations, but did not affect carbon stock in biomass or soil. Our long-term data suggest that utilizing harvesting residues for biofuel feedstocks is appropriate in this type of forest. Hence, any nitrogen and wood-ash additions appear unnecessary as compensatory measures for the removal of harvesting residues, but nitrogen can be applied to increase forest growth following thinning.

Authors/Creators:Lim, Hyungwoo and Olsson, Bengt and Lundmark, Tomas and Dahl, Jenny and Nordin, Annika
Title:Effects of whole-tree harvesting at thinning and subsequent compensatory nutrient additions on carbon sequestration and soil acidification in a boreal forest
Year of publishing :2020
Volume:12
Page range:992-1001
Number of Pages:10
Publisher:Wiley
ISSN:1757-1693
Language:English
Publication Type:Journal 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:bioenergy crop, fertilization, logging residue, net primary production, Pinus sylvestris, soil acidification, whole-tree harvesting, wood ash
URN:NBN:urn:nbn:se:slu:epsilon-p-107715
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107715
Additional ID:
Type of IDID
DOI10.1111/gcbb.12737
Web of Science (WoS)000562176200001
ID Code:17938
Faculty:S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(S) > Dept. of Forest Ecology and Management
(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:27 Oct 2020 11:11
Metadata Last Modified:06 Nov 2020 08:57

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