DOI: 10.1016/j.foreco.2016.03.016
Scopus记录号: 2-s2.0-84960434119
论文题名: Silvicultural treatments and subsequent vegetation impact long-term mineral soil biogeochemistry in mixedwood plantations
作者: Poirier V. ; Coyea M.R. ; Angers D.A. ; Munson A.D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 368 起始页码: 140
结束页码: 150
语种: 英语
英文关键词: Hardwood and softwood overstory
; Soil nitrogen
; Soil organic carbon
; Soil pH
; Surface and subsurface mineral soil
; Understory herb cover
Scopus关键词: Biogeochemistry
; Calcium
; Carbon
; Forestry
; Hardwoods
; Minerals
; Mining
; Organic carbon
; Positive ions
; Softwoods
; Vegetation
; Herb cover
; Mineral soils
; Soil nitrogen
; Soil organic carbon
; Soil pH
; Soils
; biogeochemistry
; coniferous tree
; herb
; microbial activity
; monoculture
; nitrate
; nitrification
; nutrient cycling
; overstory
; pH
; plantation
; silviculture
; soil carbon
; soil chemistry
; soil nitrogen
; soil surface
; vegetation cover
; wood
; Canada
; Ontario [Canada]
; Petawawa
; Pinus strobus
英文摘要: The combined influence of silvicultural treatments and subsequent forest vegetation succession affects long-term soil organic C (SOC) and nutrient cycling in mineral soil in ways still poorly understood, possibly by influencing soil pH and microbial activity. We investigated how silvicultural disturbance and associated vegetation affected surface (0-15 cm) and subsurface (15-40 cm) mineral soil biogeochemistry, 25 years after establishment of white pine (Pinus strobus) plantations in Petawawa, Ontario, Canada. Three silvicultural treatments led to distinct communities, characterized by contrasting structure and functional composition. The control (CTR) was characterized by a Hardwood shrub-rich forest, blade-scarification treatment (S) by a Hardwood herb-rich forest, while blade-scarification combined with vegetation control (S + V) resulted in a Softwood monoculture. Increasing dominance of the hardwood canopy and herbaceous cover in CTR and S treatments was associated with higher surface mineral soil pH and exchangeable base cations, and dominance of net nitrate (NO3 --N) over ammonium (NH4 +-N) production during incubation. In contrast, increased overstory softwood cover in the S + V treatment was associated with lower surface mineral soil pH and NH4 +-N concentrations. Across all treatment-induced communities, surface mineral soil pH and exchangeable Ca and Mg were positively correlated with total N and SOC. The relation of Ca with SOC, total N and net nitrification was similarly observed in subsurface soil. Surprisingly, herb cover rather than overstory functional character (hardwood vs softwood) was related to subsurface N cycling; increasing cover in CTR and S treatments was related to higher NH4 +-N availability and lower organic-to-inorganic N ratio, indicating accelerated cycling. We conclude that through effects on soil pH and base cations, silvicultural operations combined with subsequent hardwood and herbaceous species cover strongly regulate C and N cycling in the mineral soil of mixedwood forests. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64966
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Center for Forest Research, Département des sciences du bois et de la forêt, Faculté de foresterie, de géographie et de géomatique, Université Laval, 2405 rue de la Terrasse, Québec, QC, Canada; Soils and Crops Research and Development Center, Agriculture and Agri-Food Canada, 2560 Hochelaga Blvd., Québec, QC, Canada
Recommended Citation:
Poirier V.,Coyea M.R.,Angers D.A.,et al. Silvicultural treatments and subsequent vegetation impact long-term mineral soil biogeochemistry in mixedwood plantations[J]. Forest Ecology and Management,2016-01-01,368