1. HARVEST SCHEDULING AND CLOSE TO NATURE FORESTRY
Róbert MARUŠÁK
Department of Forest Management and Geodesy,
The Faculty of Forestry, Technical University Zvolen, SLOVAKIA

2. Harvest Scheduling to prescribe how much, when and where to cut
to secure sustainable cut
to ensure as balanced cut as possible
to take into consideration silvicultural constraints
to offer more solutions to chose the ‘best‘ one
to evaluate consequences of particular solutions

3. HS in Slovakia ALLOWABLE CUT INDICATORS
Decree no. 5/1995 on forest management in wording of later regulations
ALLOWABLE CUT INDICATORS
Final mean increment
1/20 of forest stands growing stock of the last two age classes (20 years) and older
1/30 of forest stands growing stock of the last three age classes (30years) and older
Felling volume calculated from theoretical clearing area and mean standing volume of mature stands
Felling volume calculated by using of cutting percent in age classes - exploitation percent, empirical cutting percent

4. Rotation Forest Management

5. Continuous Cover Forest

6. Shelterwood Forest System

8. DEVELOPMENT OF SILVICULTURAL SYSTEMS
Source: Agregate information of Forestry information centre of Lesoprojekt Zvolen

9. PRIORITY OF SILVICULTURAL SYSTEMS
Shelterwood
Selection
Clear-cutting

10. Exploitation percent

11. Empirical cutting percent

12. Forest user’s unit no. 1
Forest user’s unit no. 2

13. Cutting percent

14. Forest user’s unit no. 1
Forest user’s unit no. 2

15. LP model to fulfil silvicultural rules to allow natural regeneration
don’t cut young forest stands
to ensure continuous cover forestry
to optimise harvest
elimination of big differences between periods
ensuring as balanced harvest as possible
reduction of overmature, low productive forest stands

16. Maximise
Subject to

18. Forest user’s unit no. 1

19. Forest user’s unit no. 1

20. Forest user’s unit no. 1
Forest user’s unit no. 2

21. Forest user’s unit no. 1
Forest user’s unit no. 2

22. Values of allowable cut according to particular methods of calculation, their statistical characteristics and differnce between 1st and 3rd period
Forest user’s unit no. 1
Forest user’s unit no. 2

23. Comparison of inductive allowable cut (IAC) with LP solution and allowable cut indicators (EP and EEP)

24. CONCLUSION
allowable cut indicators are unsuitable for shelterwood silvicultural system (especially EP)
LP solution is more suitable:
more tender
near to inductive allowable cut
more balanced for a long time

25. International IUFRO Conference on
Sustainable Harvest Scenarios In Forest Management
Tále, The Low Tatras, Slovakia
August , 2004
sustainable forest management and harvest planning
strategic, operational and tactical harvest scheduling
simulation models at the stand and landscape levels
decision support tools for forest planning and harvest regulation