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http://hdl.handle.net/10174/17134
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Title: | Monitoring of soil organic carbon over ten years in a Mediterranean silvo-pastoral system: potential evaluation for differential management |
Authors: | Serrano, João Shahidian, Shakib Marques da Silva, José Carvalho, Mário |
Keywords: | Soil organic carbon Pastures Spatial variability Temporal stability Grazing animal |
Issue Date: | 2015 |
Publisher: | Springer Science+Business Media New York 2015 |
Citation: | Serrano, J., Shahidian, S., Marques da Silva, J., Carvalho, M. (2015). Monitoring of soil organic carbon over ten years in a Mediterranean silvo-pastoral system: potential evaluation for differential management. Precision Agriculture. Aceite em 24 de outubro de 2015. (DOI: 10.1007/s11119-015-9419-4) |
Abstract: | Soil organic carbon (SOC) plays a vital role in determining the susceptibility to
land degradation. The recommended procedure for the recovery of the characteristic poor
soils of the Southern region of Portugal is the installation of grazed permanent pastures and
increase of soil fertility. The objectives of this study were: (i) to identify the spatial and
temporal patterns of soil nutrients at four points in time over a 10-year period in a perennial
pastureland; (ii) to test new tools for survey of the spatial variability of soil nutrients; (iii)
to evaluate the potential for differential organic management. A 6 ha permanent biodiverse pasture field, grazed by sheep and improved by annual application of super
phosphate fertilizer, was installed on a shallow soil in Mediterranean conditions. Spatial
variability and temporal stability of topsoil macronutrients (phosphorus, nitrogen and
potassium), SOC and pH were measured. The results indicate that SOC and pH have great
potential for implementing differential management. In the case of SOC, the management
classes map shows that over 80 % of the area has temporal stability, while more than 50 %
of the area has low levels of SOC (\10 g kg-1), justifying the potential for differential
application of C-rich organic soil amendments. The geospatial measurements of apparent
soil electrical conductivity (ECa) and NDVI index showed significant correlation between
these parameters and soil properties, revealing the potential of these tools for producing
detailed soil maps, decisive for understanding the changes in soil properties under sustainable management systems. |
URI: | http://hdl.handle.net/10174/17134 |
Type: | article |
Appears in Collections: | ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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