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Título

Aggregate stability changes after organic amendment and mycorrhizal inoculation in the afforestation of a semiarid site with Pinus halepensis

AutorCaravaca Ballester, María Fuensanta ; García Izquierdo, Carlos; Hernández Fernández, María Teresa; Roldán Garrigos, Antonio
Palabras claveAggregate stability
Municipal waste
Organic residue
Pisolithus arhizus
Semiarid soils
Fecha de publicaciónmar-2002
EditorElsevier
CitaciónApplied Soil Ecology 19(3): 199-208 (2002)
ResumenThe recovery of soil structural stability is a precondition for successful afforestation programmes in semiarid environments. A multifactorial field experiment was carried out in a semiarid rangeland in south-eastern Spain to evaluate the influence of a fresh organic residue addition (first factor), mycorrhizal inoculation with Pisolithus arhizus (second factor), and the rhizosphere of Pinus halepensis (third factor) on soil aggregate stability. A total of 6 years after planting, the addition of residue was seen to increase the levels of stable aggregates to a greater extent than the mycorrhizal inoculation. Both reafforestation methods increased C-fractions and enzyme activities measured (dehydrogenase and phosphatase). The rhizosphere also affected aggregate stability, particularly when P. halepensis was inoculated with P. arhizus. Aggregate stability in the rhizosphere of P. halepensis was strongly correlated (P<0.01) with the C-biomass and soluble C-fractions (WSC and WSCH) as well as with dehydrogenase (r=0.901, P<0.05) and phosphatase (r=0.903, P<0.05) activities. It was concluded that the combination of residue amendment and inoculation of P. halepensis with P. arhizus significantly improves soil aggregate stability, this beneficial effect appearing to be mainly due to a reactivation of microbiological activity.
Descripción10 pages, 6 tables, 3 figures.
Versión del editorhttp://dx.doi.org/10.1016/S0929-1393(01)00189-5
URIhttp://hdl.handle.net/10261/16100
DOI10.1016/S0929-1393(01)00189-5
ISSN0929-1393
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