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Long-term forest management after wildfire(Catalonia,NE Iberian Peninsula)

Journal of Forestry Research 2020年第1期31卷 269-278页

作者： Marcos Francos Xavier Ubeda Paulo Pereira GRAM(Grup de Recerca Ambiental Mediterrania) Department of GeographyUniversity of BarcelonaMontalegre608001 BarcelonaSpain Environmental Management Centre Mykolas Romeris UniversityVilniusLithuania

Studies of post-fire soil status in Mediterranean ecosystems are common;however,few have examined the effects of long-term forest management after a wildfire on physicochemical soil ***,we analyzed differences in soil properties attributable to long-term postfire management and assessed the sustainability of these management practices in relation to the soil *** study area is located in Odena in the northeast region of the Iberian Peninsula consisted of the control forest(burned more than 30 years ago),low density forest(LD;burned in a wildfire in 1986 and managed in 2005)and high density forest(HD;burned in a wildfire in 1986 and no managed).For soils from each plot,we measured soil water repellency,aggregate stability,total nitrogen(TN),soil organic matter(SOM),inorganic carbon(IC),pH,electrical conductivity,extractable calcium,magnesium,sodium,potassium(K),phosphorus,aluminum(Al),manganese(Mn),iron(Fe),zinc,copper,boron,chrome,silicon and sulfur and calculated the ratios of C/N,Ca+Mg/(Na+K)^1/2,Ca/Al and Ca/*** differences were found in TN,IC,SOM,pH,K,Al,Mn,Fe and C/N ratio(p<0.05).All soil properties were found to have largely recovered their pre-fire *** were affected by the post-fire management practices implemented 20 years after the fire,as reflected in their respective physicochemical properties,so that soil properties at the control and LD sites are more similar today than those at the control and HD ***,sustainable forest management can overcome soil degradation in areas affected by wildfire in the medium-and long-term by improving soil properties.

关键词： Soil chemical properties Aggregate stability Post-fire management Wildfire risk vegetal density

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