DOI: 10.1016/j.foreco.2016.06.030
Scopus记录号: 2-s2.0-84976517276
论文题名: Capacity of biochar application and nitrogen fertilization to mitigate grass competition upon tree seedlings during stand regeneration
作者: Krapfl K.J. ; Hatten J.A. ; Roberts S.D. ; Baldwin B.S. ; Rousseau R.J. ; Shankle M.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 376 起始页码: 298
结束页码: 309
语种: 英语
英文关键词: Biochar
; Fertilization
; Intercropping
; Interspecific competition
; Panicum virgatum
; Pinus taeda
Scopus关键词: Forestry
; Moisture
; Nitrogen
; Nitrogen fertilizers
; Plants (botany)
; Productivity
; Reforestation
; Soil moisture
; Bio chars
; Fertilization
; Inter-specific competitions
; Intercropping
; Panicum virgatum
; Pinus taeda
; Soils
; charcoal
; competitive ability
; concentration (composition)
; coniferous tree
; crop yield
; experimental study
; fertilizer application
; grass
; intercropping
; interspecific competition
; nitrogen
; seedling
; soil amendment
; soil fertility
; Panicum virgatum
; Pinus taeda
英文摘要: Background and aims This experiment examined early competition dynamics of a tree-grass intercropping system. We hypothesized that (1) the effects of competition would outweigh those of facilitation in this system and (2) soil amendment-induced fertility would alter competitive relationships between these species. Methods We intercropped loblolly pine and switchgrass seedlings at three rates of density-induced interspecific competition (high, low, and pine only) and amended soils with biochar (0, 5, and 20 Mg ha−1) and nitrogen fertilizer (0 and 56 kg ha−1 N). We measured soil properties, foliar N concentrations, and plant productivity over two years. Results Soil temperatures decreased and total soil N increased in intercropping treatments relative to the pine only control treatment. Competition reduced soil moisture and inorganic N concentrations as well as tree productivity and switchgrass yields. Biochar amendments increased total soil C, C:N ratios, and soil moisture. Fertilization acidified soil pH and decreased total soil C and N pools. Switchgrass yields were increased and soil moisture was decreased with N fertilization. Conclusions The net effects of competition outweighed those of facilitation within this system. Competitive relationships amongst these species were altered by soil amendment-induced fertility. Favorable switchgrass responses to soil inorganic N suggests its competitive ability is increased on nitrogen-rich or fertilized sites. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64818
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forestry, Mississippi State University, Mississippi StateMS, United States; Department of Forest Engineering, Resources, and Management, Oregon State University, Corvallis, OR, United States; Department of Plant and Soil Sciences, Mississippi State University, Mississippi StateMS, United States
Recommended Citation:
Krapfl K.J.,Hatten J.A.,Roberts S.D.,et al. Capacity of biochar application and nitrogen fertilization to mitigate grass competition upon tree seedlings during stand regeneration[J]. Forest Ecology and Management,2016-01-01,376