DOI: 10.1016/j.foreco.2016.03.047
Scopus记录号: 2-s2.0-84961627540
论文题名: Nutrient release from decomposing Eucalyptus harvest residues following simulated management practices in multiple sites in Brazil
作者: Ferreira G.W.D. ; Soares E.M.B. ; Oliveira F.C.C. ; Silva I.R. ; Dungait J.A.J. ; Souza I.F. ; Vergütz L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 370 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Ca
; Harvest residue quality
; Nutrient immobilization
; Nutrient mineralization
Scopus关键词: Calcium
; Carbon
; Decomposition
; Forestry
; Harvesting
; Soils
; Sustainable development
; Carbon use efficiencies
; Decomposer communities
; Exponential decay models
; Harvest residue management
; Harvest residues
; Nutrient concentrations
; Nutrient mineralization
; Residue incorporation
; Nutrients
; calcium
; decomposition
; experimental design
; harvesting
; immobilization
; mineralization
; nutrient
; shrub
; soil chemistry
; sustainability
; Brazil
; Eucalyptus
英文摘要: The potential export of nutrients by eucalypt plantations harvest raises concern about environmental and wood production sustainability. Keeping non-commercial components in the field can minimize it. However, little is known about changes in chemistry of decomposing eucalypt harvest residues. Simulated harvest residue management practices fully replicated across 11 Brazilian representative sites were undertaken to evaluate the dynamics of macronutrient release. We studied the influence of de-barking in the field, the use of an external source of nitrogen and the placement of harvest residues (remained on the surface or incorporated into the soil). After the experiment set up, residues were sampled five times and contents of Ca, Mg, N, P, K and S were determined. We used the remaining mass and nutrient concentration to fit the single exponential decay model (X = X0e-kt) and calculate half-life (hl = ln(2)/k) of each nutrient. At the end, we calculate element ratios to see differences in residue chemistry. The presence of bark and residue incorporation into soil enhanced decomposition and decreased nutrient half-life across all site. External N had little or no effect on nutrient dynamics. Site had significant effect on nutrient half-life, but only low correlations with climate or edaphic properties could be found. C:N, C:S and C:Ca ratios were much narrower at the end. On the other hand, N:P, N:K, Ca:S and Ca:Mg were wider. C:P varied among sites, but averaged almost the same as in the beginning. Ca was the nutrient that presented the greatest immobilization, particularly in the absence of bark, indicating a critical role of this element on decomposition under the conditions tested. Our results suggest that nutrient release is more controlled by management, chemical properties of the residues and specific decomposer community needs than climate or soil properties. Microbial community seems to change their carbon use efficiency and immobilize nutrients in limiting conditions. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64940
Appears in Collections: 影响、适应和脆弱性
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作者单位: Departamento de Solos, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, Brazil; Sustainable Soil and Grassland Systems Department, Rothamsted Research, North Wyke, Okehampton, Devon, United Kingdom
Recommended Citation:
Ferreira G.W.D.,Soares E.M.B.,Oliveira F.C.C.,et al. Nutrient release from decomposing Eucalyptus harvest residues following simulated management practices in multiple sites in Brazil[J]. Forest Ecology and Management,2016-01-01,370