Fractal dimension and anisotropy of soil CO2 emission in an agricultural field during fallow
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Data
2009-01-01
Autores
La Scala, N. [UNESP]
Panosso, A. R. [UNESP]
Pereira, G. T. [UNESP]
Gonzalez, A. P.
Miranda, J. G. V.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Polish Acad Sciences
Resumo
The study of soil CO2 emission is a relevant task due to the fact that it is related to many environmental issues, especially the enhanced greenhouse effect. In this work we investigated the spatial variability structure of a bare soil CO2 emission in an area of 80 x 80 m, during twelve different days. Spatial and temporal variability analyses in the 65-point grid indicate that significant spatial heterogeneity is present in most of the days. Fractal dimension values varying from 2 to 2.88 was determined in a direction of 84.3 +/- 22.5 degrees, which is close to perpendicular of crop lines. This effect seems to be related to the structure of temporal variability of Soil CO2 emission, which presents a complex net of correlation with 83% of grid points connected within the same cluster, also with most of the points aligned perpendicular to crop lines.
Descrição
Palavras-chave
Soil respiration, Soil CO2 flux, Spatial variability, greenhouse gas
Como citar
International Agrophysics. Lublin: Polish Acad Sciences, v. 23, n. 4, p. 353-358, 2009.