DOI: 10.1016/j.foreco.2016.05.027
Scopus记录号: 2-s2.0-84971379263
论文题名: Branch occlusion and discoloration of Betula alnoides under artificial and natural pruning
作者: Wang C.-S. ; Hein S. ; Zhao Z.-G. ; Guo J.-J. ; Zeng J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 375 起始页码: 200
结束页码: 210
语种: 英语
英文关键词: Artificial pruning
; Betula alnoides
; Knot attribute
; Natural pruning
; Wood discoloration
Scopus关键词: Defects
; Forestry
; Grading
; Artificial pruning
; Betula alnoides
; Insertion angles
; Knot attribute
; Mixed-effect models
; Natural pruning
; Plantation managements
; Stem diameter growth
; Discoloration
; biological characteristics
; deciduous tree
; forest management
; forestry production
; growth rate
; plantation forestry
; pruning
; silviculture
; stubble
; Betula alnoides
英文摘要: Knot-related defects are important criteria for timber grading of valuable tree species. Clear-wood production through pruning has been an important issue in silviculture and forest management. In this study, knot attributes, branch occlusion and discoloration under natural and artificial pruning were investigated in a 10-year-old Betula alnoides plantation to determine the effectiveness of artificial pruning in mitigating knot-related defects. The dataset contained 270 occluded branches sampled from 30 artificially-pruned trees and 284 from 30 trees under natural pruning. Linear and generalized linear mixed-effect models were constructed to reveal the differences in factors influencing branch occlusion, knot size, and discoloration between natural and artificial pruning treatments. The mixed-effect models indicated that the most important factor in predicting branch occlusion time, dead knot radius, total knot radius and discoloration length was branch diameter for artificial pruning and dead branch stub length for natural pruning. The dead branch stub length was also closely and positively correlated with branch diameter under natural pruning. Branch occlusion time was negatively correlated with stem diameter growth rate during the period of branch occlusion while discoloration length was positively correlated with branch occlusion time for both treatments. In addition, acute branch insertion angle increased the size of dead knot and discoloration. It was concluded that artificial pruning promotes faster branch occlusion, reduces knot sizes and does not lead to stem discolorations, and should hence be applied in the plantation management of this species. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64845
Appears in Collections: 影响、适应和脆弱性
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作者单位: Research Institute of Tropical Forestry, Chinese Academy of Forestry, Longdong, Guangzhou, China; University of Applied Forest Sciences, Schadenweilerhof, Rottenburg, Germany
Recommended Citation:
Wang C.-S.,Hein S.,Zhao Z.-G.,et al. Branch occlusion and discoloration of Betula alnoides under artificial and natural pruning[J]. Forest Ecology and Management,2016-01-01,375