DOI: 10.1016/j.foreco.2015.03.029
Scopus记录号: 2-s2.0-84926460523
论文题名: Inter-annual variability of precipitation constrains the production response of boreal Pinus sylvestris to nitrogen fertilization
作者: Lim H. ; Oren R. ; Palmroth S. ; Tor-ngern P. ; Mörling T. ; Näsholm T. ; Lundmark T. ; Helmisaari H.-S. ; Leppälammi-Kujansuu J. ; Linder S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 348 起始页码: 31
结束页码: 45
语种: 英语
英文关键词: Carbon partitioning
; Climate variation
; Light interception
; Net primary production
; Scots pine
; Temperature
Scopus关键词: Carbon
; Ecology
; Ecosystems
; Nitrogen
; Nitrogen fertilizers
; Optical data processing
; Productivity
; Sand
; Temperature
; Carbon partitioning
; Climate variation
; Light interception
; Net primary production
; Scots pine
; Forestry
; boreal forest
; coniferous tree
; fertilizer application
; foliage
; forest management
; forestry production
; leaf area index
; long-term change
; net primary production
; nitrogen
; photosynthesis
; phytomass
; precipitation assessment
; temporal variation
; Climates
; Light
; Pinus Sylvestris
; Temperature
; Pinus sylvestris
英文摘要: Tree growth resources and the efficiency of resource-use for biomass production determine the productivity of forest ecosystems. In nutrient-limited forests, nitrogen (N)-fertilization increases foliage [N], which may increase photosynthetic rates, leaf area index (L), and thus light interception (IC ). The product of such changes is a higher gross primary production and higher net primary production (NPP). However, fertilization may also alter carbohydrate partitioning from below- to aboveground, increasing aboveground NPP (ANPP). We analyzed effects of long-term N-fertilization on NPP, and that of long-term carbon storing organs (NPPS ) in a Pinus sylvestris forest on sandy soil, a wide-ranging forest type in the boreal region. We based our analyses on a combination of destructive harvesting, consecutive mensuration, and optical measurements of canopy openness. After eight-year fertilization with a total of 70gNm-2, ANPP was 27±7% higher in the fertilized (F) relative to the reference (R) stand, but although L increased relative to its pre-fertilization values, IC was not greater than in R. On the seventh year after the treatment initiation, the increase of ANPP was matched by the decrease of belowground NPP (78 vs. 92gCm-2yr-1; ~17% of NPP) and, given the similarity of IC , suggests that the main effect of N-fertilization was changed carbon partitioning rather than increased canopy photosynthesis. Annual NPPS increased linearly with growing season temperature (T) in both treatments, with an upward shift of 70.2gCm-2yr-1 by fertilization, which also caused greater amount of unexplained variation (r2=0.53 in R, 0.21 in F). Residuals of the NPPS -T relationship of F were related to growing season precipitation (P, r2=0.48), indicating that T constrains productivity at this site regardless of fertility, while P is important in determining productivity where N-limitation is alleviated. We estimated that, in a growing season average T (11.5±1.0°C; 33-year-mean), NPPS response to N-fertilization will be nullified with P 31mm less than the mean (325±85mm), and would double with P 109mm greater than the mean. These results suggest that inter-annual variation in climate, particularly in P, may help explaining the reported large variability in growth responses to fertilization of pine stands on sandy soils. Furthermore, forest management of long-rotation systems, such as those of boreal and northern temperate forests, must consider the efficiency of fertilization in terms of wood production in the context of changes in climate predicted for the region. © 2015 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/65431
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, Sweden; Division of Environmental Science and Policy, Nicholas School of the Environment, Duke University, Durham, NC, United States; Department of Forest Sciences, University of Helsinki, P.O. Box 27, Helsinki, Finland; Southern Swedish Forest Research Centre, SLU, P.O. Box 49, Alnarp, Sweden
Recommended Citation:
Lim H.,Oren R.,Palmroth S.,et al. Inter-annual variability of precipitation constrains the production response of boreal Pinus sylvestris to nitrogen fertilization[J]. Forest Ecology and Management,2015-01-01,348