Natural regenerationon of ravine-gally systems and former arable lands in Оvruch region

Abstract

The article evaluates the success of natural regeneration of European spruce on ravine-gully systems, Scots pine and other tree species on fallows. It was found out that on the lands of the state forest fund of the State Enterprise «Ovruch Specialized Forestry» there is a rich natural renewal, which in the future will be able to replace the native stand. It is in good condition and will be able to perform its ecoapproval functions under favorable circumstances. On the eroded lands of the state forest fund the main part is occupied by natural regeneration of European spruce in the amount of 3.4 to 15.0 thousand pieces per ha, which is sufficient for the reproduction of highly productive, biologically stable stands on these lands. Spruce regeneration is aged from 4 to 9 years and is characterized by the following biometric indicators: weighted average height – from 0.9 to 2.6 m, diameter – from 0.2 to 2.6 cm. An important indicator of the viability of natural regeneration of European spruce is its number, which ranges from trial areas from 2.1 to 8.5 thousand pieces per ha. On the fallow lands of the agricultural firm «Polissya» in Ovruch district, the main share is occupied by the natural regeneration of Scots pine, in the amount of 0.7 to 2.1 thousand pieces per ha, which is not sufficient for the reproduction of native stands. According to biometric indicators that characterize the natural regeneration of Scots pine, hanging birch and gray alder 9–11 years of age are: height – from 4.0 to 4.6 m, diameter – from 9.0 to 9.9 cm. lands natural regeneration was insufficient. Unsatisfactory condition of natural regeneration on fallow lands has low quality and productivity, which is due to turfing, soil hardness, insufficient moisture (precipitation).