DOI: 10.1016/j.foreco.2014.10.003
Scopus记录号: 2-s2.0-84908344385
论文题名: Biomass resource and environmental effects of Norway spruce (Picea abies) stump harvesting: An Estonian case study
作者: Uri V. ; Aosaar J. ; Varik M. ; Becker H. ; Kukumägi M. ; Ligi K. ; Pärn L. ; Kanal A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 335 起始页码: 207
结束页码: 215
语种: 英语
英文关键词: Biomass
; Carbon loss
; Nutrient removal
; Picea abies
; Soil respiration
; Stump harvesting
Scopus关键词: Carbon loss
; Nutrient removal
; Picea abies
; Soil respiration
; Stump harvesting
; Biomass
; allometry
; bioenergy
; biomass
; carbon flux
; coniferous tree
; environmental effect
; harvesting
; nutrient loss
; plant residue
; potential energy
; soil respiration
; Estonia
; Picea abies
英文摘要: Stump removal is a novel potential source of woody biomass for renewable energy in the Nordic and Baltic countries. In Estonia, a prospective resource of Norway spruce (. Picea abies) stumps is available for bioenergy. The main aims of the present study were to estimate the biomass and volume of harvested spruce stumps; also to evaluate nutrient and carbon loss from a site due to stump removal; and to estimate the effect of stump harvesting on soil respiration.In this pilot study an allometric model was elaborated for estimation of the biomass and volume of harvested stumps. The volume of harvested spruce stumps reached up to 130m3ha-1 and potential energy content amounted to 290MWhha-1. The average calorific value of different stump and root fractions varied between 19.0 and 19.3kJg-1 and there was no significant difference between the stump fractions. The weighted average density of the harvested spruce stumps was 430kgm-3.Fertile automorphic forest types were selected for this pilot study and the nitrogen (N) storage removed from clear-cuts with stumps was not appreciable, being 1.2-4.4%, in comparison with soil N storages. Removed phosphorus (P) accounted for 8-28% of total soil lactate soluble P and removed potassium (K) accounted for 6-23% of the soil K storage. The loss of carbon (C) made up 11-33% of the soil C storage. However, the concentration of lactate soluble P evidently reflected the balance between solubilized and assimilated P in the soil rather than actual P limitation. Hence, at fertile sites stump removal does not caused considerable N and C depletion, however, removal of P and K may be appreciable compared with corresponding soil storage values.Stump harvesting did not increase soil respiration intensity. Total annual soil respiration at the Oxalis site type was 4.9 and 5.1tCha-1yr-1 in the uprooted and control plots, respectively. At the Myrtillus site type the respective values were lower, 3.7 and 3.9tCha-1yr-1. Also soil heterotrophic respiration in the Oxalis site type was practically the same at the uprooted and control sites, being 3.3-3.2tCha-1yr-1. However, in the Myrtillus site type the values of the heterotrophic respiration efflux was higher from the control plots than from the uprooted plot, at 2.5 and 1.8Cha-1yr-1, respectively.Norway spruce stumps are a potential bioenergy resource in Estonian forests and stump harvesting at fertile autotrophic sites does not cause problems in terms of depletion of nutrients and carbon from the ecosystem. © 2014 Elsevier B.V.All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65651
Appears in Collections: 影响、适应和脆弱性
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作者单位: Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, Tartu, Estonia; Institute of Ecology and Earth Sciences, University of Tartu, Vanemuise 46, Tartu, Estonia
Recommended Citation:
Uri V.,Aosaar J.,Varik M.,et al. Biomass resource and environmental effects of Norway spruce (Picea abies) stump harvesting: An Estonian case study[J]. Forest Ecology and Management,2015-01-01,335