The Influence of Forest Stands and Reproduction Cuttings in the Chemical Composition of Water Flowing off to Water Sources in the Research Watersheds of Beskydy Mountains

1986

S. 73-117

10 Tab., 27 Lit. Ang.

Unselbständiges Werk

200010838

In the research watersheds of the Forestry and Game Management Research Institute Jiloviste-Strnady in Beskydy Mountains there was investigated in the period from November 1981 till February 1984 the chemical state of water precipitations caught on the open area and under the stand canopy. Further the chemical state of gravitation water in the soil and of water taken away on the gauge canals. In the watershed of Mala Raztoka with the area of 1.85 km2 the renewing of the broadleaved stands (mainly of beech) by spruce was done during the measurement which attained roughly 10% of the area. In the watershed of Cervik A with the area 0.88 km2 the spruce stands were advancely felled and renewed also by spruce (roughly 90% of watershed area). In the watershed Cervik B (0.84 km2) remained the mature stands without renewing interventions. As the geologic bed of the told watersheds are the godul sandstones; the relatively shallow, stony, acid brown forest soils, partly podzolised, at present with low provision of "accessible" cations (in water extract of 1% lemonic acid) developed in the deeper parts of soil profile. The crowns of stands universally raise the concentrations of elements in the drip water and more heavy in water flowing down on stems. The spruce stands show the greater enrichment of them than the beech ones. The covering humus in the watershed Mala Raztoka calls out together with surface horizons of the mineral soil the raising of element concentration in the gravitational water but in the depth round of 20 cm the intensive separation (Formel) occurs. In the soil of new made bare clearing the dynamics of elements with soil water was higher than under the beech stand. By Na, Mg, Ca, Mn the further increasing of concentrations in the lower parts of profile was evident.