Vpliv nege na zgradbo in vrstno sestavo v procesu naravnega naseljevanja vrst na zemljiščih v zaraščanju
The effects of forest tending on stand structure and composition during secondary succession of abandoned agricultural lands

slovenian

2015

volume 73, issue 7/8

Zveza gozdarskih društev Slovenije
(Obvezni izvod spletne publikacije)

The research deals with the effects of forest tending on stand structure and composition on abandoned agricultural lands and possibilities of directing succession development of these stands. This attempt to evaluate the tending ran five vegetation seasons and was divided into three parts. In the first part we checked the initial condition and performed the tending. Setting the goals which are formed according to the development phase and consequent expediently performed silvicultural tending actions, on the abandoned agricultural lands in the thicket phase it is necessary to give priority primarily to the pioneer species due to their protective role, while in the pole stand phase the stress should be laid to the species, interesting from the silvicultural viewpoint, e.g. noble broadleaved trees, minority tree species and climax species. In the second (after three vegetation seasons) and third (after five vegetation seasons) part we again checked the condition and thereby the effects of tending. We applied statistical methods for studying the effects of tending. With the tending we stimulated shifting of the tree species, which are important stand builders in the preliminary phases of succession (above all sycamore maple), and increased diameter increment of the crop trees. Through timely tending actions it is possible to stimulate natural succession on the abandoned agricultural lands and direct it toward economically interesting and ecologically stable forest, whereby it is necessary to stress that low intensity actions are needed for a stable stand, otherwise stand stability is endangered. On the lands, where other roles are in the foreground, stand quality is of secondary importance. The costs of thicket tending on abandoned agricultural lands are lower than the costs of pole stand tending.

27.05.2016