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

Lilli Matilda Kaarakka, Janne Vaittinen, Mikael Marjanen, Sofie Hellsten, Mikko Kukkola, Anna Saarsalmi, Marjo Maarit Palviainen, Heljä-Sisko Marketta Helmisaari

Research output: Contribution to journalArticleScientificpeer-review

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.
Original languageEnglish
JournalForest Ecology and Management
Volume425
Pages (from-to)27-34
Number of pages8
ISSN0378-1127
DOIs
Publication statusPublished - 15 May 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 4112 Forestry
  • FOREST CARBON
  • Coarse roots
  • Picea abies
  • Soil disturbance
  • Biomass

Cite this

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title = "Stump harvesting in Picea abies stands: soil surface disturbance and biomass distribution of the harvested stumps and roots",
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.",
keywords = "4112 Forestry, FOREST CARBON, Coarse roots, Picea abies, Soil disturbance, Biomass",
author = "Kaarakka, {Lilli Matilda} and Janne Vaittinen and Mikael Marjanen and Sofie Hellsten and Mikko Kukkola and Anna Saarsalmi and Palviainen, {Marjo Maarit} and Helmisaari, {Helj{\"a}-Sisko Marketta}",
year = "2018",
month = "5",
day = "15",
doi = "10.1016/j.foreco.2018.05.032",
language = "English",
volume = "425",
pages = "27--34",
journal = "Forest Ecology and Management",
issn = "0378-1127",
publisher = "Elsevier Scientific Publ. Co",

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Stump harvesting in Picea abies stands: soil surface disturbance and biomass distribution of the harvested stumps and roots. / Kaarakka, Lilli Matilda; Vaittinen, Janne; Marjanen, Mikael; Hellsten, Sofie; Kukkola, Mikko; Saarsalmi, Anna; Palviainen, Marjo Maarit; Helmisaari, Heljä-Sisko Marketta.

In: Forest Ecology and Management, Vol. 425, 15.05.2018, p. 27-34.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Stump harvesting in Picea abies stands: soil surface disturbance and biomass distribution of the harvested stumps and roots

AU - Kaarakka, Lilli Matilda

AU - Vaittinen, Janne

AU - Marjanen, Mikael

AU - Hellsten, Sofie

AU - Kukkola, Mikko

AU - Saarsalmi, Anna

AU - Palviainen, Marjo Maarit

AU - Helmisaari, Heljä-Sisko Marketta

PY - 2018/5/15

Y1 - 2018/5/15

N2 - 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.

AB - 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.

KW - 4112 Forestry

KW - FOREST CARBON

KW - Coarse roots

KW - Picea abies

KW - Soil disturbance

KW - Biomass

U2 - 10.1016/j.foreco.2018.05.032

DO - 10.1016/j.foreco.2018.05.032

M3 - Article

VL - 425

SP - 27

EP - 34

JO - Forest Ecology and Management

JF - Forest Ecology and Management

SN - 0378-1127

ER -