Impacto inmediato del laboreo sobre la calidad del suelo en un viñedo en la D.O.P. Somontano (Huesca, Aragón) manejado con cubierta espontánea.

[EN] Immediate impact of tillage on soil health in a D.O.P. Somontano (Huesca, Aragón) vineyard previously managed with spontaneous vegetation. In vineyards, soil management using plant covers might cause a competition for water and nutrients, which could lead to reductions in yield. In the medium to long term, establishing a vegetal ground cover in the vineyard may enhance soil properties, but this impact strongly depends on the edaphoclimatic conditions of each plot. Consequently, this work aims at determining the effect of a surface tillage on several soil health indicators and the wa ter status in a vineyard located in Somontano (Huesca) that has been managed with spontaneous vegetation during the previous five years. Soil physical and chemical properties were not altered by tillage; however, biological properties (microbial biomass, diversity of arthropods) were considerably reduced. Moreover, spontaneous vegetation did not affect grapevine water status. This suggests that establishing a plant cover is a sustainable alternative to tillage under the conditions of this study.