| DOI: | 10.1016/j.foreco.2016.03.034
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| Scopus记录号: | 2-s2.0-84962704069
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| 论文题名: | Exponential fertilization promotes seedling growth by increasing nitrogen retranslocation in trembling aspen planted for oil sands reclamation |
| 作者: | Pokharel P.; Chang S.X.
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| 刊名: | Forest Ecology and Management
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| ISSN: | 0378-1127
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| 出版年: | 2016
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| 卷: | 372 | | 起始页码: | 35
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| 结束页码: | 43
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| 语种: | 英语
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| 英文关键词: | 15N isotope
; Biomass allocation
; LFH
; Nutrient loading
; Peat mineral soil mix
; Weed competition
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| Scopus关键词: | Biomass
; Forestry
; Land reclamation
; Land use
; Minerals
; Nitrogen
; Nutrients
; Oil sands
; Peat
; Proven reserves
; Reclamation
; Revegetation
; Sand
; Soil conservation
; Soils
; Biomass allocation
; Mineral soils
; N isotopes
; Nutrient loading
; Weed competition
; Ecology
; biomass allocation
; competition (ecology)
; fertilizer application
; growth response
; land reclamation
; nitrogen isotope
; nutrient availability
; nutrient dynamics
; oil sand
; peat soil
; phytomass
; revegetation
; seedling
; soil remediation
; translocation
; Populus tremuloides
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| 英文摘要: | Vegetation reestablishment in land reclamation is often challenged by high mortality and slow growth of planted species because of low nutrient availability and severe understory competition. We tested the effectiveness of exponential fertilization in nursery trembling aspen (Populus tremuloides Michx.) seedling production for improving revegetation success on reconstructed soils in the Oil Sands in a two-year field experiment using a 2 (exponentially vs conventionally fertilized seedlings) × 2 (weed intact vs weed removed) factorial design. The experiment was conducted on two different cover soil types: peat mineral soil mix (PMM) and LFH mineral soil mix (LFH). Nitrogen (N) retranslocation in outplanted seedlings was traced using 15N labeling. Exponential fertilization and weed removal increased height and root collar diameter growth but did not affect seedling survival over two growing seasons. Exponential fertilization increased new stem and leaf biomass and N content but decreased the percent allocation of biomass to roots. On average, 80% (on the PMM site) and 73% (on the LFH site) of total N demand of new tissues was met by internal N retranslocation. Exponential fertilization increased N retranslocation by 34% (P < 0.01) and 25% (P = 0.02) on the PMM and LFH sites, respectively. Weed competition reduced N retranslocation by 37% (P < 0.01) and N uptake by seedlings from the soil by 61% (P = 0.01) on the LFH site. We conclude that greater accumulation of nutrient reserves and greater N retranslocation helped to increase the growth of exponentially fertilized aspen seedlings that were outplanted for oil sands reclamation. Exponential fertilization of aspen seedlings for oil sands reclamation should be operationally tested for improving land reclamation in the Oil Sands. © 2016 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/64923
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| Appears in Collections: | 影响、适应和脆弱性
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作者单位: | Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton, Canada
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| Recommended Citation: | |
Pokharel P.,Chang S.X.. Exponential fertilization promotes seedling growth by increasing nitrogen retranslocation in trembling aspen planted for oil sands reclamation[J]. Forest Ecology and Management,2016-01-01,372
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