DOI: 10.1016/j.scitotenv.2020.136793
论文题名: Effect of ash application on the decomposer food web and N mineralization in a Norway spruce plantation
作者: Mortensen L.H. ; Cruz-Paredes C. ; Qin J. ; Rønn R. ; Vestergård M.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 715 语种: 英语
英文关键词: Decomposer food web
; Nitrogen mineralization
; Soil organisms
; Structural equation modelling
; Sustainable forest management
; Wood ash
Scopus关键词: Bacteria
; Biofuels
; Climate change
; Ecology
; Floors
; Mineralogy
; Nitrogen
; Nutrients
; Protozoa
; Soils
; Food webs
; Nitrogen mineralization
; Soil organisms
; Structural equation modelling
; Sustainable forest management
; Wood ash
; Forestry
; biofuel
; nitrogen
; biofuel
; coniferous forest
; food web
; forest management
; mineralization
; nitrogen cycle
; numerical model
; nutrient availability
; regression analysis
; soil microorganism
; sustainability
; wood ash
; arthropod
; Article
; ash
; bacterium
; controlled study
; decomposer
; earthworm
; Enchytraeidae
; food web
; forest management
; fungal biomass
; nematode
; nitrogen availability
; nitrogen mineralization
; nonhuman
; Norway spruce
; plantation
; population abundance
; priority journal
; protozoon
; structural equation modeling
; sustainable agriculture
; Bacteria (microorganisms)
; Enchytraeidae
; Nematoda
; Picea abies
; Protozoa
英文摘要: In the face of global climate change there is an increasing demand for biofuel, which exerts pressure on production and thus management of biofuel plantations. The intensification of whole-tree harvest from biofuel plantations increases export of nutrients. Returning ash from biofuel combustion to the forest plantations can amend the soil nutrient status and thus facilitate sustainable forest management. However, ash affects the forest floor decomposer food web, potentially changing organic matter turnover, carbon sequestration and nitrogen availability. Our aim was to examine the response of decomposer organisms, food web structure and nitrogen mineralization function after ash application. In a coniferous forest plantation amended with 0, 3, 4.5 or 6 t ash ha− 1, we sampled in several depths of the forest floor for key organisms of the decomposer food web (fungal biomass, 0–12 cm; bacteria, protozoa, nematodes and enchytraeids, 0–3 cm and 3–6 cm; microarthropods and earthworms, 0–5 cm), 2, 14 and 26 months after ash application. We used structural equation modelling (SEM) to detangle the direct and indirect effects of ash application on organisms in the decomposer food web and on nitrogen availability. We found that ash increased the abundance of bacteria and protozoa, as well as the inorganic nitrogen pool at 0–3 cm depth, whereas the effect of ash was negligible at 3–6 cm depth. Earthworm abundance increased, whereas enchytraeid abundance decreased 2 years after ash application. The structural equation modelling showed that ash application stimulated the bacterial feeding pathway and increased nitrogen mineralization. Contrary, ash had a negative effect on fungal biomass at the first sampling, however, this effect subdued over time. Our results suggest that as the soil decomposer food web is resilient to ash application, this is a viable option for sustainable management of biofuel plantations. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158298
Appears in Collections: 气候变化与战略
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作者单位: Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Universitetsparken 15, Copenhagen Ø, 2100, Denmark; Soil Fauna Ecology and Ecotoxicology, Department of Bioscience, Aarhus University, Vejlsøvej 25, Silkeborg, 8600, Denmark; Department of Agroecology, AU-Flakkebjerg, Aarhus University, Forsøgsvej 1, Slagelse, 4200, Denmark
Recommended Citation:
Mortensen L.H.,Cruz-Paredes C.,Qin J.,et al. Effect of ash application on the decomposer food web and N mineralization in a Norway spruce plantation[J]. Science of the Total Environment,2020-01-01,715