Efectos de la quema controlada sobre matorral en la erosión hídrica, el valor pastoral y las propiedades del suelo a largo plazo

Abstract

The soil losses by laminate erosion and the edaphic factors have been evaluated in a sloping segment of 2,68 ha of the “Tuña" woodland municipality of Tineo, affected for descending controlled burns of Erica and Ulex with a yield of 1,5 ha h-1. They were measured soil losses of 9,18, 18,84 and 11,82 t ha-1 año-1 before burning, to the 12 and 24 months respectively, showing the minimum influence of the prescribed fire in the hydrological answer. The soil alterations to the 6, 12, 18 and 24 months, took place to 0- 2, 2-5 and 5-10 cm of depth, showing the existence of an increment of the soil fertility. To the 6 and 12 months of the fire, clay fraction increased and sand it diminished and vice versa to the 18 months of the controlled burns. The pastoral value increased 37% to the 12 months of the burns, observing from there, a light decrease. The long term increase of fertility after the fire it could be taken advantage of by the vegetal cover result of the burned vegetation regrowth.