Selection of clones of silver birch and black locust with outstanding wood quality
Plus trees of silver birch (Betula pendula) and black locust (Robinia pseudoacacia) were selected and propagated vegetatively. These trees were chracterised by very straight stems (birch and black locust) or special wood grain (curly birch). A number of clone test were established at different sites. These tests will be evaluated.
Black locust has very good wood properties and can produce sufficient amounts of wood at poor and dry sites. Unfortunately most stands have bad stem form. Simlilar it is the case for birch. Additionaly for birch trees occure with a special grain of the wood. Such wood is very rare and much sought-after for veneer production.
This project is aimed to the selction of clones of birch and black locust with straight stems and for birch also with grained wood in field trials. Such clones will be proposed for the approval as basic material in the category "tested" according the legal regulations.
forest owners, nurseries, forest adminstration
Clones of selected plus trees were propagated by tissue culture and planted in field trials. After 5-25 years these trials were assessed and the data were analysed.
Data will be analysed by ANOVA for 10 clone test with birch and 2 field trials with black locust. Few trees of clones of curly birch were cutted and processed to veneer for estimation of quality.
One clone of curly birch has been proposed for approval in the category "tested" up to now. Trees of this clone developed grained wood at different sites and showed a sufficient stem form and growth performance.
3.2012 - 5.2015
Project status: ongoing