DOI: 10.1016/j.foreco.2013.07.062
Scopus记录号: 2-s2.0-84884404910
论文题名: Effects of planting density and cultural intensity on stand and crown attributes of mid-rotation loblolly pine plantations
作者: Akers M.K. ; Kane M. ; Zhao D. ; Teskey R.O. ; Daniels R.F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 468
结束页码: 475
语种: 英语
英文关键词: Canopy
; Crown
; Culture
; Density
; Loblolly pine
; Radiation
Scopus关键词: Canopy
; Crown
; Cultural intensities
; Current annual increments
; Intercepted photosynthetically active radiations
; Loblolly pine
; Loblolly pine plantations
; Remote sensing techniques
; Cell culture
; Density (specific gravity)
; Heat radiation
; Nutrients
; Plants (botany)
; Sensors
; Forestry
; basal area
; canopy architecture
; competition (ecology)
; coniferous tree
; growth rate
; light effect
; numerical model
; nutrient cycling
; photosynthetically active radiation
; plantation
; population density
; radiation balance
; remote sensing
; stand structure
; tree planting
; Crowns
; Density
; Forest Canopy
; Nutrients
; Pinus Taeda
; Radiation
; Sensors
; Tissue Culture
; United States
英文摘要: Loblolly pine (Pinus taeda) is an important timber species in the southeastern US and abroad. A better understanding of loblolly pine crown relationships with growth has implications for improving productivity estimates using process-based models or remote sensing techniques. Four study installations in the Upper Coastal Plain and Piedmont of Georgia were used to examine the effects of planting density and cultural intensity on loblolly pine stand growth and crown attributes. Treatments included six planting densities, ranging from 740 to 4440 trees ha-1, in a split-plot design with two different levels of fertilization and competition control. The "low intensity (LI)" cultural treatment included relatively high nutrient inputs and early competition control. The "high intensity (HI)" cultural treatment included even greater nutrient inputs and complete sustained competition control. Treatment effects on stand and crown attributes were examined at age 13. Fertilization and competition control did not have a major influence on stand and crown attributes. Stands planted at lower densities resulted in significantly greater DBH and height but less standing volume per hectare, basal area per hectare, and current annual increment (CAI) volume growth compared to stands planted at higher densities. Stand-level foliar biomass, peak projected leaf area index (LAI), foliar nitrogen (N) content, specific leaf area (SLA), and intercepted photosynthetically active radiation (IPAR) were significantly greater for stands planted at higher densities, while live crown length and crown ratio were significantly greater for stands planted at the lower densities. IPAR efficiency (CAI per IPAR) was significantly affected by planting density, with values of 0.32-0.42m3 %IPAR-1 for 740 and 4440 trees ha-1, respectively. At this stage of stand development, light limitations due to high stocking have a greater influence on growth than soil resource limitations for the loblolly pine plantations analyzed in this study. Higher density stands resulted in increased SLA and IPAR efficiency, supporting the idea that higher density stands utilize light more efficiently than lower density stands. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66301
Appears in Collections: 影响、适应和脆弱性
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作者单位: Warnell School of Forestry And Natural Resources, University of Georgia, 180 E. Green Street, Athens, GA 30602, United States
Recommended Citation:
Akers M.K.,Kane M.,Zhao D.,et al. Effects of planting density and cultural intensity on stand and crown attributes of mid-rotation loblolly pine plantations[J]. Forest Ecology and Management,2013-01-01,310