Juvenile growth and frost damages of poplar clone OP42 in Latvia
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Kuupäev
2017
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Short rotation plantations in the northern Europe are commonly established using
poplar clone OP42 (Populus maximowiczii Henry × P. trichocarpa Torr. and Gray). We assessed
its growth and suitability to the climate in central part of Latvia at juvenile age. Trees that had
formed single stem were significantly higher (121 ± 2.5 cm), thicker (7.1 ± 0.48 mm) and had
longer branches (32 ± 1.5 cm) than trees that had formed multiple stems. In beginning of the
second growing season all trees had died stems and 19.6% of them formed new shoots from the
ground level. The sprouting trees had random spatial distribution in the field. Regardless of the
number of stems, the sprouting trees were significantly lower (110 ± 3.9 cm) than the dead trees
(119 ± 2.0 cm). During the repeated assessment about one month later, proportion of the
sprouting trees increased up to 44%, but the detected relations between measured traits of
sprouting and dead trees remained. Clone OP42 had serious frost induced damages also in autumn
phenology experiment (96% trees with severely damaged leaves). Our results suggest that frost
prone sites are not suitable for establishment of plantations of OP42 clone.
Kirjeldus
Article
Märksõnad
Populus maximowiczii × P. trichocarpa, clone OP42, sprouting, freeze-thaw, wood dysfunction, articles