Stump harvesting in Picea abies stands: soil surface disturbance and biomass distribution of the harvested stumps and roots

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http://hdl.handle.net/10138/235579

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Kaarakka , L M , Vaittinen , J , Marjanen , M , Hellsten , S , Kukkola , M , Saarsalmi , A , Palviainen , M M & Helmisaari , H-S M 2018 , ' Stump harvesting in Picea abies stands: soil surface disturbance and biomass distribution of the harvested stumps and roots ' , Forest Ecology and Management , vol. 425 , pp. 27-34 . https://doi.org/10.1016/j.foreco.2018.05.032

Title: Stump harvesting in Picea abies stands: soil surface disturbance and biomass distribution of the harvested stumps and roots
Author: Kaarakka, Lilli Matilda; Vaittinen, Janne; Marjanen, Mikael; Hellsten, Sofie; Kukkola, Mikko; Saarsalmi, Anna; Palviainen, Marjo Maarit; Helmisaari, Heljä-Sisko Marketta
Contributor organization: Department of Forest Sciences
Forest Soil Science and Biogeochemistry
Forest Ecology and Management
Date: 2018-10-01
Language: eng
Number of pages: 8
Belongs to series: Forest Ecology and Management
ISSN: 0378-1127
DOI: https://doi.org/10.1016/j.foreco.2018.05.032
URI: http://hdl.handle.net/10138/235579
Abstract: Finland has a long tradition of utilizing forest-based biomass for energy and industry purposes and the use has steadily increased in the past decade due to changes in international and regional energy policies. Intensive harvesting practices, in which a larger proportion of the woody biomass is removed from the forest stand, are becoming more common. The objectives of this study were (i) to evaluate the spatial and temporal extent of soil surface disturbance caused by stump-root system harvesting and (ii) to quantify how much biomass and nitrogen is removed from the stand in stump and coarse root removal. The extent of surface disturbance was assessed in three clear-cut Norway spruce (Picea abies, (L.) Karst.) stands in southern and central Finland, differing in time since harvest. To determine the biomass distribution of the stump-root system, stumps and coarse roots were excavated at one of the experimental stands. Across all age classes (time since harvest) less soil surface had remained undisturbed at the stump harvesting sites (48%) than at the sites where only mechanical site preparation (72%) had been carried out. Thus, the findings of this study indicate that soil disturbance caused by stump harvesting can exist on forest soil surface for more than a decade following harvest. The total biomass of the stump-root system in the stand was estimated to 39.3 Mg ha-1 and 79% of this biomass was removed during stump harvesting and consequently, 8.3 Mg ha-1 of stump-root biomass remained in soil. The stump-root system accounted for 17% of the whole-tree biomass, and coarse roots and fine coarse roots represented a significant portion of it (73%). Thus, the stump-root system represents a large biomass component in boreal forest stands. However, forest management utilizing stumps may result in carbon losses from the stand.
Subject: 4112 Forestry
FOREST CARBON
Coarse roots
Picea abies
Soil disturbance
Biomass
forest soil
Soil surface disturbance
Stump harvesting
SCOTS PINE STANDS
NORWAY SPRUCE STAND
BOREAL FORESTS
NUTRIENT RELEASE
LOGGING RESIDUES
CARBON STOCKS
NITROGEN POOLS
Finland
bioenergy
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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