DOI: 10.1016/j.foreco.2014.10.035
Scopus记录号: 2-s2.0-84911191478
论文题名: Changes in belowground biomass after coppice in two Populus genotypes
作者: Berhongaray G. ; Verlinden M.S. ; Broeckx L.S. ; Ceulemans R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 337 起始页码: 1
结束页码: 10
语种: 英语
英文关键词: Allometry
; Biomass allocation
; Coarse roots
; Fine roots
; Root:shoot
; SRWC
Scopus关键词: Biology
; Biomass
; Soils
; Allometry
; Biomass allocation
; Coarse roots
; Fine roots
; Root:shoot
; SRWC
; Forestry
; allometry
; belowground biomass
; biomass allocation
; carbon cycle
; coppice
; fine root
; genotype
; mortality
; Biomass
; Coppice
; Plantations
; Populus
; Roots
; Populus
英文摘要: Despite the potential of high-density, short-rotation woody biomass plantations to sequester carbon (C) in the soil, few studies have examined their belowground components. We were particularly interested in the biomass allocation patterns after the change from a single-stem (pre-coppice) to a multi-shoot (post-coppice) system, as well as in the fine root (Fr; θ<2mm) mortality after coppice for their implications in the belowground C cycle. The root system of selected trees from two poplar (Populus spp.) genotypes - Skado and Koster - were excavated for the determination of coarse (Cr, θ>5mm) and medium-sized (Mr, θ2-5mm) roots. After two 2-year rotations, the Cr biomass (dry mass, DM) was higher in the P. trichocarpa × P. maximowiczii genotype Skado (187.0gDM m-2) than in the P. deltoides × P. nigra genotype Koster (155.4gDM m-2). Both genotypes showed a relatively shallow, but extensive root system. Allometric equations were fitted between DM of Cr and Mr, and basal area. The root:shoot ratio decreased exponentially with basal area, showing the same trend for single-stem and multi-shoot trees. The soil coring technique was used to determine Fr mass at different dates and at different soil depths. The highest Fr biomass was detected in the upper 15cm of the soil; no genotypic differences in Fr mass were detected at any soil depth. After coppice Fr mortality was significantly increased and weed root biomass significantly reduced. The coppice of the aboveground stems and shoots resulted in a high input of C into the soil and a large amount of C was stored in belowground tree biomass. © 2014 Published by Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65592
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biology, Research Group of Plant and Vegetation Ecology, University of Antwerp, Universiteitsplein 1, Wilrijk, Belgium
Recommended Citation:
Berhongaray G.,Verlinden M.S.,Broeckx L.S.,et al. Changes in belowground biomass after coppice in two Populus genotypes[J]. Forest Ecology and Management,2015-01-01,337