Bilous M. Ekologic-forestri peculiarities of reproduction of forest stands on plough-lands of the Chernigov Polissia

The thesis work is devoted to investigation of a problem of formation of highly productive and biologically steady forest stands, on the grounds which long term used in agriculture. Influence of soil conditions of the grounds removed from agriculture on growth and development of forest stands hove been established. This papers also presents the results of investigation of features of root system formation on the grounds. The most suitable way of cultivation of ground, density and mixing of tree species for creation of forest crop hove been determined. Peculiarities of reforestation of forest stands and features of structure these stands on plough-lands hove been investigation. As a result of the researches it is established, that soil conditions plough-lands of the Chernigov Polissia in connection with low fertility and presence of the condensed horizons of ground slow down growth and development of forest stands. Preceding from this it is offered an optimum way of ground cultivation for plantings forest crop on plough-lands, initial density of tree species and modes of their mixing. It is determined actions on increase of productivity and economic value of forest stands of a natural origin.