DOI: 10.1016/j.foreco.2015.11.012
Scopus记录号: 2-s2.0-84946854839
论文题名: Changes in forest floor and soil nutrients in a mixed oak forest 33 years after stem only and whole-tree harvest
作者: Johnson D.W. ; Trettin C.C. ; Todd D.E.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 361 起始页码: 56
结束页码: 68
语种: 英语
英文关键词: Clearcut
; Forest floor changes
; Harvest
; Long-term response
; Regeneration
; Soil response
Scopus关键词: Calcium
; Floors
; Harvesting
; Meteorological problems
; Nutrients
; Reforestation
; Soils
; Vegetation
; Clearcut
; Forest floors
; Long-term response
; Regeneration
; Soil response
; Forestry
; allometry
; carbon
; clearcutting
; concentration (composition)
; deciduous forest
; forest floor
; harvesting
; long-term change
; mixed forest
; regeneration
; soil analysis
; soil nutrient
; stem
; vegetation cover
; Tennessee
; United States
英文摘要: Vegetation, forest floor, and soils were resampled at a mixed oak site in eastern Tennessee that had been subjected to stem only (SOH), whole-tree harvest (WTH), and no harvest (REF) 33years previously. Although differences between harvest treatments were not statistically significant (P<0.05), average diameter, height, basal area and biomass were 8-18% lower in the WTH than in the SOH treatment 33years after harvest whereas they differed by 2% 15years after harvest. In contrast to results 15years post-harvest, total forest floor mass and nutrient contents were twofold greater in the WTH than in the SOH treatment at 33years post-harvest, due largely to differences in Oa horizon mass. Soil total C concentrations increased significantly (P<0.05) over the first 15years post-harvest in both harvest treatments. Decreases in soil C between 15 and 33years post-harvest were not statistically significant. Soil total N increased significantly in both harvest treatments over the first 15years post-harvest. Consistent decreases in soil total N occurred in the WTH treatment between years 15 and 33 post-harvest that bordered on statistical significance whereas total N was stable over that time period in the SOH treatment. The increases and decreases in soil N content cannot be explained by any known processes of N inputs or outputs. Harvest treatment effects on both Ca2+ and Mg2+ observed at 15years post-harvest are still observable and significant at 33years post-harvest, although decreases between 15 and 33years were found. Treatment effects and changes in soil exchangeable Ca2+ and Mg2+ are consistent with known inputs from decomposing logging residues, inputs from atmospheric deposition, and increments in forest floor and vegetation. No treatment effects were found for soil extractable P, but steady decreases over time were found. No treatment or time effects were found for soil exchangeable K+. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65125
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources and Environmental Science, University of Nevada, Reno, NV, United States; USDA Forest Service, 2730 Savannah Highway, Charleston, SC, United States
Recommended Citation:
Johnson D.W.,Trettin C.C.,Todd D.E.. Changes in forest floor and soil nutrients in a mixed oak forest 33 years after stem only and whole-tree harvest[J]. Forest Ecology and Management,2016-01-01,361