Spatial variability structure of soil CO2 emission and soil attributes in a sugarcane area

•Fractal dimension of soil attributes were obtained at medium and large scale.•Weak correlation was observed between soil respiration (FCO2) and soil attributes.•Spatial variability structures of all variables studied were complex.•Fractograms allowed better relating FCO2 and soil attributes spatial...

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Bibliographic Details
Published in:Agriculture, ecosystems & environment ecosystems & environment, 2014-05, Vol.189, p.206-215
Main Authors: Bicalho, E.S., Panosso, A.R., Teixeira, D.D.B., Miranda, J.G.V., Pereira, G.T., La Scala, N.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Bulk density
Carbon dioxide
Emission
Fractal analysis
Fractal dimension
Fundamental and applied biological sciences. Psychology
General agroecology
General agroecology. Agricultural and farming systems. Agricultural development. Rural area planning. Landscaping
General agronomy. Plant production
Generalities. Agricultural and farming systems. Agricultural development
Geostatistics
Mechanized harvest
Microporosity
Porosity
Soil (material)
Soil respiration
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Summary:•Fractal dimension of soil attributes were obtained at medium and large scale.•Weak correlation was observed between soil respiration (FCO2) and soil attributes.•Spatial variability structures of all variables studied were complex.•Fractograms allowed better relating FCO2 and soil attributes spatial structures. Soil CO2 emission (FCO2) is influenced by chemical, physical and biological factors that affect the production of CO2 in the soil and its transport to the atmosphere. FCO2 varies in time and space depending on environmental conditions, including the management of the agricultural area. The aim of this study was to investigate the spatial variability structure of FCO2 and soil attributes in a mechanically harvested sugarcane area (green harvest) using fractal dimension (DF) derived from isotropic variograms at different scales (fractograms). FCO2 showed an overall average of 1.51μmol CO2m−2s−1 and correlated significantly (P
ISSN:0167-8809
1873-2305
DOI:10.1016/j.agee.2014.03.043