DOI: 10.1016/j.foreco.2013.03.034
Scopus记录号: 2-s2.0-84876794625
论文题名: Growth dynamics of hardwood stands during the precommercial thinning phase - Recovery of retained stems after competition release
作者: Rytter L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 302 起始页码: 264
结束页码: 272
语种: 英语
英文关键词: Competition
; Deciduous trees
; Diameter growth
; Green crown
; Precommercial thinning
Scopus关键词: Alnus glutinosa (L.) Gaertn
; Competition release
; Deciduous trees
; Diameter growth
; Green crown
; Pre-commercial thinning
; Significant differences
; Young hardwood stands
; Competition
; Hardwoods
; Recovery
; Timber
; Forestry
; canopy architecture
; deciduous tree
; diameter
; dominance
; forest management
; forestry practice
; forestry production
; growth rate
; stem
; thinning
; Competition
; Forestry
; Growth
; Hardwoods
; Recovery
; Thinning
; Sweden
; Alnus
; Alnus glutinosa
; Betula pendula
; Populus
; Populus tremula
; Tilia
; Tilia cordata
英文摘要: Early management of hardwood stands is important if the goal is to produce high-quality timber and it may also reduce the rotation period. Both effects are favourable for the economic outcome of hardwood forestry. Eight young hardwood stands, dominated by either birch (Betula pendula Roth and B. pubescens Ehrh.), black alder (Alnus glutinosa (L.) Gaertn.), aspen (Populus tremula L.) or lime (Tilia cordata Mill.), in need of precommercial thinning, were identified in southern Sweden. The aim was to assess the effect of delayed thinning and thinning intensity on retained trees under north European conditions. Three treatments were applied: (1) 5. years delayed thinning, (2) standard thinning, and (3) strong thinning to 2/3 the stand density of treatment 2. Retained trees were followed during 11. years and showed that delayed thinning resulted in smaller crowns and slower diameter development than in the thinned alternatives. There were only minor differences between standard and strong thinning. After thinning the trees of the delayed thinning alternative showed partial recovery of the crowns. There were no longer any significant differences in green crown base height although differences in green crown radius and crown ratio remained between the delayed and the other two thinning alternatives. Furthermore, diameter growth rate of the delayed thinning trees recovered to about the same level as for trees with earlier thinning. However, differences in diameter and in the ratio diameter:height persisted, indicating that diameter loss in the early rotation phase cannot be compensated for later. It is concluded that early precommercial thinning lead to better early diameter growth than delayed thinning but also that young stands with late thinning can recover in diameter growth rate resulting in shifted but parallel diameter growth curves. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66576
Appears in Collections: 影响、适应和脆弱性
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作者单位: The Forestry Research Institute of Sweden (Skogforsk), Ekebo 4450, SE-26890 Svalöv, Sweden
Recommended Citation:
Rytter L.. Growth dynamics of hardwood stands during the precommercial thinning phase - Recovery of retained stems after competition release[J]. Forest Ecology and Management,2013-01-01,302