
handle: 10261/57904
[ES]Se estudia la dínamica de nutrientes en el agua en tres bosques de Quercus pyrenaica y uno de Castanea sativa, localizados en la Sierra de Gata, Provincia de Salamanca), siguiendo un gradiente pluviométrico (720-1580 mn/año), y con diferentes sustratos rocosos (granito calcoalcalino, esquistos y grauwacas). Las muestras de agua en el suelo se obtuvieron a varias profundidades (desde 15 a 110 cm), durante un ciclo anual, con cápsulas de cerámica porosa con succión. El agua de trascolación también fué analizada. El pH de agua de trascolación fué 0.7 puntos más alto que el de la solución edáfica. También se observa un pH de la solución edáfica inferior al del suelo. Aluminio soluble y pH presentan una clara correlación negativa en la solución edáfica. Na+ es el ión más independiente en el sistema. Los cationes mayoritarios en el agua transcolada fueron: K>Ca>Na>Mg, y en la solución edáfica fueron: Si>K>Ca>Mg>Na>Al. Hay un incremento general de bioelementos de la solución hídrica en los horizontes orgánicos, pero el reciclado de nutrientes en esos horizontes parece ser efectivo.
[EN] A study of forest water was carried out in three Quercus pyrenaica and one Castanea sativa sites (Sierra de Gata mountains, NW-SPAIN), with a rainfall gradient (720-1580 mm/year), and different parent substrates (calcoalkaline granite, schists and graywackes). Soil-water samples were obtained at various depts (from 15 to 110 cm), during one annual cycle, using porous ceramic-cup suction samplers. Throughfall waters were also collected. The pH of the throughfall water is 0.7 point higer than soil solution. A lower pH of the soil relative to soil water is observed. Al and pH in soil water present a quite good negative correlation. Na is the most independient ion. The main cations of the throughfall solution were KK>Ca>Mg>Na>Al. There is a general increase of soil solution concentration in the soil organic horizon. but the nutrient recycling seems to be very effective.
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