The given bachelor´s work deals with the research of changes with regard to soil hydraulic conductivity in production and natural forests of the mountain region of Poľana. The work describes also influences of forest-tree species upon forest land water regime .Soil samples were taken from the stand of production forest and natural area on the basis of which a hydraulic conductivity was detected. Soil samples in the production forest were taken at age factors, while in a reserve there is no age factors discernment. The hydraulic conductivity was detected on the base of a permeameter method. The hydraulic conductivity is stated in cm per a day. The analysis of measured results proves that soil hydraulic conductivity in production and natural forests does not show big diametral differences. The rage of values of hydraulic conductivity is very broad on the both research areas. The hydraulic conductivity in a production forest is 421 cm/day , in a natural forest it is 275,82 cm/day. The bigger hydraulic conductivity concerning a production forest was recorded in a spruce stand. On the basis of our evaluation we can state that management intesity partially exercise an influence on changes of soil hydraulic conductivity but not in a such large extent as a soil heterogeneity itself.