DOI: 10.1016/j.foreco.2015.08.036
Scopus记录号: 2-s2.0-84941098601
论文题名: Decomposition and nutrient release from Norway spruce coarse roots and stumps - A 40-year chronosequence study
作者: Palviainen M. ; Finér L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 358 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Calcium
; Carbon
; Coarse woody debris
; Nitrogen
; Phosphorus
; Potassium
Scopus关键词: Calcium
; Carbon
; Debris
; Ecosystems
; Forestry
; Nitrogen
; Phosphorus
; Plants (botany)
; Potassium
; Rate constants
; Boreal forests
; Chronosequences
; Coarse woody debris
; Decomposition rate constants
; Forest ecosystem
; Nutrient cycling
; Nutrient release
; Southern Finland
; Nutrients
; boreal forest
; calcium
; carbon
; carbon balance
; chronosequence
; clearcutting
; coniferous tree
; decomposition
; forest ecosystem
; nitrogen
; nutrient availability
; phosphorus
; potassium
; root
; woody debris
; Decay
; Ecosystems
; Nutrients
; Picea Abies
; Roots
; Stumps
; Finland
; Picea abies
英文摘要: Stumps and coarse roots form the largest part of the coarse woody debris in managed boreal forests but their contribution to nutrient cycling and carbon balance of forest ecosystems is poorly understood. Decomposition and nutrient (C, N, P, K, Ca) release from Norway spruce (Picea abies) coarse roots (diameters 5-10 cm and >10 cm) and stumps were studied in southern Finland in a chronosequence of stands clear-cut 0, 5, 10, 20, 30 and 40. years ago. Density, mass and the amount of C decreased significantly faster from stumps than from coarse roots. The average annual decomposition rate constants (k-values) for the whole 40-year study period were 0.040 for stumps, 0.024 for >10 cm diameter roots and 0.034 for 5-10 cm diameter roots. The release of N was extremely slow since stumps, >10 cm roots and 5-10 cm roots still contained 97%, 107% and 96% of the initial amounts of N, respectively, after 40. years of decomposition. The amount of P was significantly higher in 40-year decomposed stumps (115%) than in >10 cm (71%) and 5-10 cm (61%) roots. Stumps, >10 cm roots and 5-10. cm roots lost 79%, 79% and 81% of their initial amount of K, and 51%, 47% and 45% of their initial amount of Ca, respectively, during the 40-year period. The results indicate that coarse roots and stumps are long-term C pools and sources of nutrients for vegetation in boreal forests. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65260
Appears in Collections: 影响、适应和脆弱性
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作者单位: University of Helsinki, Department of Forest Sciences, P.O. Box 27, Helsinki, Finland; Natural Resources Institute Finland (Luke), P.O. Box 68, Joensuu, Finland
Recommended Citation:
Palviainen M.,Finér L.. Decomposition and nutrient release from Norway spruce coarse roots and stumps - A 40-year chronosequence study[J]. Forest Ecology and Management,2015-01-01,358