DOI: 10.1016/j.foreco.2016.11.006
Scopus记录号: 2-s2.0-85007369653
论文题名: Nitrogen leaching following clear-cutting and soil scarification at a Scots pine site – A modelling study of a fertilization experiment
作者: Rappe George M.O. ; Hansson L.J. ; Ring E. ; Jansson P.E. ; Gärdenäs A.I.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 385 起始页码: 281
结束页码: 294
语种: 英语
英文关键词: Disc trenching
; Ecosystem modelling
; Forest regeneration
; Nitrogen cycling
; Nitrogen leaching
Scopus关键词: Budget control
; Calibration
; Compressive strength
; Ecology
; Ecosystems
; Leaching
; Nitrogen
; Nitrogen fertilizers
; Reforestation
; Soil moisture
; Soils
; Trenching
; Vegetation
; Water quality
; Ecosystem modelling
; Fertilization experiment
; Forest fertilization
; Forest regeneration
; Nitrogen cycling
; Nitrogen leaching
; Soil organic matters
; Temperature dynamics
; Forestry
; acidification
; biomass
; boreal forest
; clearcutting
; coniferous tree
; ecosystem modeling
; fertilizer application
; leaching
; nitrogen cycle
; nutrient budget
; nutrient uptake
; physical property
; regeneration
; scarification
; soil nitrogen
; Sweden
; Pinus sylvestris
英文摘要: Boreal forest stands fertilized with nitrogen (N) might be susceptible to elevated N leaching following clear-cutting, with consequences for water quality and soil acidification. Here, we studied a forest fertilization experiment with N, 165 Hagfors, in Sweden during the first six years (2006–2011) following clear-cutting. The N fertilization treatments were 0 kg ha−1 (0 N) and 450 kg ha−1 of N (450 N), supplied during 1981–1992 to a Scots pine (Pinus sylvestris L.) stand: the stand was harvested in March 2006. Following clear-cutting, disc trenching was performed and furrows (F), ridges (R) and areas in-between two furrows (IB) were created. We calculated the N leaching fluxes and ecosystem N budget during 2006–2011 as affected by previous N fertilization, disc trenching and interactions thereof, at Hagfors by the use of a process-based biogeophysical ecosystem model (CoupModel). The model was calibrated against measurements of soil water and temperature dynamics and previously reported measurements of N in soil solution, soil organic matter and vegetation biomass. Criteria for acceptance of model estimates were based on the range enclosed by the 95% confidence intervals of the mean of the field data used in calibration sampled at low frequency (1–2 occasions) and a combination of the mean error and the coefficient of the determination for variables sampled at a higher frequency (28–1921 occasions). The accepted model estimates of the mean annual leaching rates of N were 3.1 (range 1.4–22.7) and 2.4 (range 0.8–7.0) kg ha−1 of N year−1 in the treatments 0 N and 450 N, respectively, without disc trenching. Disc trenching increased N leaching during the regeneration phase, more so in the 450 N treatment (mean 6.1, range 1.9–16.7 kg ha−1 of N year−1) than in the 0 N treatment (mean 4.6, range 1.9–12.9 kg ha−1 of N year−1). Overall, differences in the posterior model parameter estimates between N treatments and disc trenched treatments F, R and IB were related to the soil physical component: the differences resulted in enhanced drainage in the disc trenched treatments. We conclude that vegetation biomass N accumulation controlled soil water N leaching, and disc trenching increased N leaching from the previously N fertilized plots at Hagfors by its effects on water drainage flow and vegetation N uptake. This finding warrants more research since N fertilization followed by soil scarification in boreal forests is a practice which may increase in the future. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64561
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Soil and Environment, Swedish University of Agricultural Sciences, Box 7014, Uppsala, Sweden; Skogforsk, The Forestry Research Institute of Sweden, Uppsala Science Park, Uppsala, Sweden; Department of Land and Water Resources Engineering, Royal Institute of Technology, Teknikringen 76, Stockholm, Sweden; Department of Biological and Environmental Sciences, University of Gothenburg, Box 461, Gothenburg, Sweden
Recommended Citation:
Rappe George M.O.,Hansson L.J.,Ring E.,et al. Nitrogen leaching following clear-cutting and soil scarification at a Scots pine site – A modelling study of a fertilization experiment[J]. Forest Ecology and Management,2017-01-01,385