DOI: 10.1016/j.foreco.2013.03.016
Scopus记录号: 2-s2.0-84876786237
论文题名: Soil carbon and nitrogen content and stabilization in mid-rotation, intensively managed sweetgum and loblolly pine stands
作者: Johnsen K.H. ; Samuelson L.J. ; Sanchez F.G. ; Eaton R.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 302 起始页码: 144
结束页码: 153
语种: 英语
英文关键词: Loblolly pine
; Soil C
; Soil N
; Stabilization, forest productivity
; Sweetgum
Scopus关键词: Atmospheric carbon dioxide concentration
; Chemical and biologicals
; Forest productivity
; Loblolly pine
; Loblolly pine (pinus taeda l.)
; Soil density fractions
; Stand productivities
; Sweetgum
; Atmospheric chemistry
; Biogeochemistry
; Biological materials
; Carbon
; Carbon dioxide
; Forestry
; Irrigation
; Nitrogen
; Organic compounds
; Productivity
; Soils
; Weed control
; Stabilization
; basal area
; belowground biomass
; carbon sequestration
; concentration (composition)
; coniferous tree
; deciduous tree
; drip irrigation
; forest management
; forestry practice
; forestry production
; pest control
; soil carbon
; soil nitrogen
; soil organic matter
; stabilization
; stand dynamics
; weed control
; Carbon
; Carbon Dioxide
; Forestry
; Irrigation
; Nitrogen
; Organic Compounds
; Pinus Taeda
; Productivity
; Soil
; Weed Control
; Liquidambar
; Liquidambar styraciflua
; Pinus taeda
英文摘要: Intensive forestry has resulted in considerable increases in aboveground stand productivity including foliar and belowground biomass which are the primary sources of soil organic matter. Soil organic matter is important for the maintenance of soil physical, chemical and biological quality. Additionally, sequestering carbon (C) in soils may provide a means of mitigating increasing atmospheric carbon dioxide concentrations. In this study, we examined soil C and nitrogen (N) contents and stabilization in 12-year-old, intensively managed sweetgum (Liquidambar styraciflua L.) and loblolly pine (Pinus taeda L.) stands. The treatments examined include: (1) complete weed control; (2) weed control plus drip irrigation; (3) weed control plus drip irrigation and fertigation; and (4) (pine only) weed control plus irrigation, fertigation, and pest control. C and N stabilization was analyzed sequentially by fractionating the soil samples into six fractions using solutions of increasing density. These fractions represented increasingly stable organic matter pools. There was a trend towards increasing C and N contents with increasing management intensity that increase stand productivity; however, these differences were only significant for soil C content in sweetgum. Across all the sweetgum plots, soil C content generally increased with basal area (BA); no such relationship was found in loblolly pine although its BA was equal or higher than that of sweetgum. Generally, across all depths most C was found in the two lightest and in the heaviest fractions. These results suggest that changes to soil C due to increased forest management intensity which increases forest productivity, when they did occur, mostly did not change the percentages of C among soil density fractions over the 12. years of the experiment suggesting minimal inputs of recalcitrant C into the soil; however, even these transient changes may be still be important if intensive management is maintained over subsequent rotations. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66556
Appears in Collections: 影响、适应和脆弱性
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作者单位: USDA Forest Service, Southern Research Station, 3041 Cornwallis Road, Research Triangle Park, NC 27709, United States; School of Forestry and Wildlife Sciences, Auburn University, 3301 SFWS Building, Auburn, AL 36849, United States; USDA Forest Service, 201, 14th Street SW, Mail Stop 1120, Washington, DC 20250, United States
Recommended Citation:
Johnsen K.H.,Samuelson L.J.,Sanchez F.G.,et al. Soil carbon and nitrogen content and stabilization in mid-rotation, intensively managed sweetgum and loblolly pine stands[J]. Forest Ecology and Management,2013-01-01,302