DOI: 10.1016/j.foreco.2013.06.034
Scopus记录号: 2-s2.0-84880584515
论文题名: Plant carbon pools and fluxes in coppice regrowth of Eucalyptus globulus
作者: Drake P.L. ; Mendham D.S. ; Ogden G.N.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 306 起始页码: 161
结束页码: 170
语种: 英语
英文关键词: Carbon balance
; Defoliation
; Resprout
; Source-sink
; Starch
Scopus关键词: Carbohydrate reserves
; Carbon balance
; Defoliation
; Eucalyptus globulus
; Respiration rate
; Resprout
; Source-sink
; TSS concentration
; Carbon
; Carbon dioxide
; Lakes
; Starch
; Forestry
; belowground biomass
; carbohydrate
; carbon flux
; concentration (composition)
; crop rotation
; defoliation
; evergreen tree
; forestry
; mass balance
; mobilization
; regrowth
; resprouting
; seedling
; starch
; sugar
; translocation
; tree planting
; Carbon Dioxide
; Defoliation
; Forestry
; Lakes
; Starch
英文摘要: Forestry systems frequently utilise coppice regrowth to establish 2nd and later rotations, partly because early growth in coppice is often faster than in seedlings. This rapid regrowth is to some extent attributable to translocation of below-ground reserves to support the development of new shoots. Translocation of below-ground carbon (C) from either the existing soluble pool or C mobilised from storage could require elevated respiration rates in roots. We studied changes in the rate of CO2 efflux (R15) and total soluble sugar (TSS) concentration from different components of coppice and uncut trees in a Eucalyptus globulus (Labill.) plantation for 8months after cutting. We also examined the impact of shading of the regrowth coppice as a means of increasing the dependence on carbohydrate reserves. The R15 of lateral roots declined soon after trees were felled but increased in uncut (control) trees. The TSS concentration decreased in the lateral roots of coppiced trees and also in the lateral roots of uncut trees. Early coppice regrowth was not associated with an elevated R15 or alteration to the TSS concentration of roots. A mass balance of C derived 8 months after trees were felled suggested that coppice maintained a significant amount of soluble C in roots, even though net C fixation was low, especially in the shaded treatment. One explanation for these observations is that mobilisation and/or transport of C in developing coppice is sink-limited, or alternatively, translocation of C from roots to shoots is constrained by vascular connections. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66431
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources Branch, Department of Parks and Wildlife, 17 Dick Perry Avenue, Technology Park, Kensington, WA 6151, Australia; School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; CSIRO Sustainable Ecosystems, Centre for Environment and Life Sciences, Underwood Avenue, Floreat, WA 6014, Australia; CSIRO Sustainable Ecosystems, Private Bag 12, Hobart, TAS 7001, Australia
Recommended Citation:
Drake P.L.,Mendham D.S.,Ogden G.N.. Plant carbon pools and fluxes in coppice regrowth of Eucalyptus globulus[J]. Forest Ecology and Management,2013-01-01,306