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Dudelis, Janis, 2013. Development of stratified spruce-birch stands in Latvia. Second cycle, A2E. Alnarp: SLU, Southern Swedish Forest Research Centre



Natural properties of Norway spruce (Picea abies) and birch (Betula spp.)suggest a good ecological ability to form a stratified mixture with birch in a upper and spruce in a lower stratum. Maintaining birch as the shelter over planted spruce in the beginning of rotation
might result in higher overall yield than spruce monocultures. Other advantages such as
higher ecological stability, increased biodiversity and better economic performance have
been demonstrated by studies in other Northern European countries.

A stratified mixture of Norway spruce and silver birch and pure Norway spruce stand growing on fertile sites in north-east of Latvia were the study objects. The main objective of the study was to evaluate silvicultural aspects and economic performance of the mixed stand and make a comparison to spruce monoculture.

Production of spruce alone was 19, 15 and 14 % lower in the mixed stand compared to spruce monoculture over simulated rotations of 60, 80 and 100 years, respectively. However, birch shelter, which was removed latest at age 42 years, produced substantial wood volume, and overall yield was 8, 5 and 5 % higher in the mixed stand for the respective rotations. More frequent frost induced damage was observed in the pure spruce stand, however, whipping damages were evident in the mixed stand. Economic outcome, in
terms of land expectation value, was higher for management alternatives in the mixture.

Main title:Development of stratified spruce-birch stands in Latvia
Authors:Dudelis, Janis
Supervisor:Ekö, Per Magnus
Examiner:Agestam, Eric
Series:Examensarbete / SLU, Institutionen för sydsvensk skogsvetenskap
Volume/Sequential designation:210
Year of Publication:2013
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:SM001 Euroforester - Master's Programme 120 HEC
Supervising department:(S) > Southern Swedish Forest Research Centre
Keywords:Latvia , Norway spruce, birch, mixed stands, volume yield, economic outcome
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Forestry - General aspects
Deposited On:05 Jul 2013 13:54
Metadata Last Modified:05 Jul 2013 13:54

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