DOI: 10.1016/j.foreco.2011.11.044
Scopus记录号: 2-s2.0-84869878953
论文题名: Leaf area and light use efficiency patterns of Norway spruce under different thinning regimes and age classes
作者: Gspaltl M. ; Bauerle W. ; Binkley D. ; Sterba H.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 288 起始页码: 49
结束页码: 59
语种: 英语
英文关键词: APAR
; Maestra
; Picea abies
Scopus关键词: Allometric equations
; APAR
; Austria
; Forest stand
; Increasing trees
; Individual tree
; Leaf area
; Light use efficiency
; Maestra
; Norway spruce
; Per unit
; Photosynthetically active radiation
; Picea abies
; Picea Abies (L.) Karst
; Resource use
; Self-shading
; Stand levels
; Stand structures
; Stem growth
; Thinning regimes
; Tree size
; Volume increment
; Efficiency
; Plants (botany)
; Three dimensional
; Forestry
; age class
; allometry
; leaf area
; light effect
; light use efficiency
; photosynthesis
; silviculture
; stand structure
; thinning
; three-dimensional modeling
; tree
; Forestry
; Leaves
; Light Absorption
; Picea Abies
; Silviculture
; Thinning
; Austria
; Picea abies
英文摘要: Silviculture focuses on establishing forest stand conditions that improve the stand increment. Knowledge about the efficiency of an individual tree is essential to be able to establish stand structures that increase tree resource use efficiency and stand level production. Efficiency is often expressed as stem growth per unit leaf area (leaf area efficiency), or per unit of light absorbed (light use efficiency). We tested the hypotheses that: (1) volume increment relates more closely with crown light absorption than leaf area, since one unit of leaf area can receive different amounts of light due to competition with neighboring trees and self-shading, (2) dominant trees use light more efficiently than suppressed trees and (3) thinning increases the efficiency of light use by residual trees, partially accounting for commonly observed increases in post-thinning growth. We investigated eight even-aged Norway spruce (Picea abies (L.) Karst.) stands at Bärnkopf, Austria, spanning three age classes (mature, immature and pole-stage) and two thinning regimes (thinned and unthinned). Individual leaf area was calculated with allometric equations and absorbed photosynthetically active radiation was estimated for each tree using the three-dimensional crown model M. aestra. Absorbed photosynthetically active radiation was only a slightly better predictor of volume increment than leaf area. Light use efficiency increased with increasing tree size in all stands, supporting the second hypothesis. At a given tree size, trees from the unthinned plots were more efficient, however, due to generally larger tree sizes in the thinned stands, an average tree from the thinned treatment was superior (not congruent in all plots, thus only partly supporting the third hypothesis). © 2011 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66864
Appears in Collections: 影响、适应和脆弱性
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作者单位: Institute of Forest Growth, University of Natural Resources and Life Sciences (BOKU), Vienna, Peter Jordan Strasse 82, 1190 Vienna, Austria; Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, United States; Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO 80523, United States
Recommended Citation:
Gspaltl M.,Bauerle W.,Binkley D.,et al. Leaf area and light use efficiency patterns of Norway spruce under different thinning regimes and age classes[J]. Forest Ecology and Management,2013-01-01,288