Aggregate Development and Organic Matter Storage in Mediterranean Mountain Soils
MetadataShow full item record
Soil aggregation and organic matter of soils from the pre-Pyrenean range in Catalonia (NE Spain) were studied, in order to assess their quality as carbon sinks and also to select the best soil management practices to preserve their quality. Aggregate stability, organic carbon and micromorphology were investigated. The highest amount of organic carbon was found in alluvial, deep soils (228 Mg C ha−1), and the lowest was in a shallow, stony soil with a low plant cover (78 Mg C ha−1). Subsurface horizons of degraded soils under pastures were the ones with smaller and less-stable aggregates. Fresh residues of organic matter (OM) were found mostly in interaggregate spaces. Within the aggregates there were some organic remains that were beginning to decompose, and also impregnative nodules of amorphous OM. Although OM was evenly distributed among the aggregate fractions, the larger blocky peds had more specific surface, contained less decomposed OM and had a lower organic/mineral interphase than smaller crumb aggregates, which were also more stable. Soil carbon storage was affected primarily by the OM inputs in the surface horizons. In order to store organic carbon over the mid- and long-term periods, the mechanisms favouring structuration through biological activity and creating small aggregates with intrapedal stable microporosities seemed to be the most effective.
Is part ofPedosphere, 2010, vol. 20, núm. 6, p. 702-710
European research projects
Showing items related by title, author, creator and subject.
Pig slurry and mineral fertilization strategies' effects on soil quality: Macroaggregate stability and organic matter fractions Yagüe Carrasco, María Rosa; Bosch Serra, Àngela D.; Antúnez Pujol, Montserrat; Boixadera Llobet, Jaume (Elsevier, 2010)Applying pig slurry to the land as fertilizer at appropriate agronomic rates is important to close nutrient cycles and optimize the value of organic matter. However a long-term discussion has taken place about its effects ...
Soil aggregation and organic carbon protection in a no-tillage chronosequence under Mediterranean conditions Plaza Bonilla, Daniel; Cantero-Martínez, Carlos; Viñas Dueso, Pablo; Álvaro-Fuentes, Jorge (Elsevier, 2013)Low-intensity soil management systems like no-tillage (NT) are being increasingly accepted as an essential part of sustainable farming systems. The objective of this work was to study the effects of NT maintenance over ...
Tillage effects on soil aggregation and soil organic carbon profile distribution under Mediterranean semi-arid conditions Plaza Bonilla, Daniel; Cantero-Martínez, Carlos; Álvaro-Fuentes, Jorge (Wiley, 2010)In rainfed semi-arid agroecosystems, soil organic carbon (SOC) may increase with the adoption of alternative tillage systems (e.g. no-tillage, NT). This study evaluated the effect of two tillage systems (conventional ...