Skötselmetoder för bestånd med produktions- och naturvårdsmål
This study is made on assignment by the local board of forestry in Skåne,
Blekinge and Halland.
The change of the forest law 1994 brought a new type of management plan.
A more active planning was introduced in order to equate the environment goal
with the production goal. The purpose with this study is to give a better picture of
how planning for nature conservation in production forest is made and to develop
support for selection of silviculture methods for stands with combined goals. With
combined goals means production forestry with a reinforced consideration to both
nature and culture, called PF-classified stands. This was done by:
? Describing silviculture models from the literature that are possible to use
for stands with combined goals.
? Describing silviculture models that is used in practice in stands with
combined goals.
? Describing how the classification of stands with combined goals is used.
Which means, were in the terrain, with which frequency and in which type
of forest PF-classification is used.
? Comparing differences and similarities of theoretical and practical used
models.
The study was done partly as a literature study and partly as an interview study of
forest planners. These planners were active in Halland, Skåne and Blekinge. In
order to get as large amount of data as possible planners from local board of
forestry , Södra and Skogssällskapet were interviewed.
Through the literature study a number of possible silviculture models were
developed, for stands with combined goals. It resulted in singletree cutting,
selective cutting, regeneration with shelterwood and stands with mixed tree
species composition. The results from the analysis of the local forestry boards
data shows that all tree-species apart from spruce occurs relatively more often in
PF-stands than average. The interviews resulted in five main types of stands with
combined goals. The stands are mixed noble deciduous tree, 8 %, older beech
stands, 11 %, stand-zones, 14 %, shelterwood of pine, 18 % and production stands
of spruce with specific natural or cultural objects 27%. There is an uncertainty
among the interviewed forest planners how the different types with combined
goals should be managed. They agree that the stands should be managed with
continues cover forestry or regeneration under shelterwood. The exeption is
spruce with specific natural or cultural objects. This stand type is still managed
with traditionally spruce silviculture but with small areas of nature consideration
to maintain the protection area.