Search

Vegetation of oak forests of Polissia is a synthetic and very sensitive indicator of ecological conditions of habitats. After continuous fellings of the main use, there are significant changes in the floristic composition and coenotic structure of vegetation. To preserve biodiversity, the dynamics of soil moisture (Hd), soil acidity (Rc) and the amount of mineral nitrogen in the soil (Nt) were studied on the basis of complete geobotanical descriptions of time series of forest areas with oak forests using phytoindication methods (scoring). It is established that a sharp change in soil parameters occurs immediately after the completion of felling and removal from the plantation of the main edificator - the stand. In the process of vegetation restoration, after the creation of forest oak crops, there is a gradual restoration of soil parameters. Thus, soil moisture (Hd) has the lowest values in plantations before the period of crown closure – 10.70±0.21 points, which increases significantly after the stand formation. The best-formed vegetation in oak forests of wet soils is characterized by 90-year-old cenoses in which there is a decrease in soil moisture to a minimum value – 10.30±0.12 points. The lowest soil acidity (Rc) is characteristic of maternal 120-year-old biogeocenoses – 9.50±0.10 points, the highest – 7.90±0.20 points – for 3-year-old groups. The amount of mineral nitrogen (Nt) in the soil is in the range – from 4.50±0.15 (biennial forest crops) to 4.90±0.15 points (100-year-old and 120-year-old oak biogeocenoses). Thus, during the restoration period of oak forests, the return of soil parameters to the initial values’ level characteristic of the maternal subclimax plantations is observed. In the future, research on the main trends in the restoration of environmental parameters of soils after continuous fellings and the development of methods of their use for practical purposes are promising.