Available Online: http://www.ejpau.media.pl/volume15/issue2/abs-01.html
HOW CAN WE PROPAGATE THE METASEQUOIA GLYPTOSTROBOIDES HU ET CHENG?
Department of Dendrology and Nursery, The August Cieszkowski Agricultural University of Poznan, Poland
The Dawn Redwood can be propagated by seed sowing and by vegetative methods. For sowing are used imported seeds, because trees growing in Poland do not give productive seeds. Only the oldest specimen growing in Botanic Garden of Warsaw University, in years when very advantageous weather conditions occur, gives some seeds able to germination. Creation of unavailing seeds depends on many factors. Male flowers usually do not develop and pollination cannot be attained. There is also a lack of specimens in phase of senile growth in Poland. The oldest trees are a little over fifty years old. Very often plants able to propagation are growing separately, what hampers to cross pollination. In 1971 it was advanced hypothesis, that achieving of seeds in temperate climatic zone is impossible because of to short vegetation period for Dawn Redwood. Its vegetation period should have 134 days. It is then longer than by other coniferous trees losing its needles before winter. For example for Japanese Larch it is 115 days, and for Bald Cypress 96 days. Dawn Redwood can be propagate vegetative by hardwood or half-ripen cuttings. Works on this subject were started in England in 1948 and in United States of America. Mother plants were five months old seedlings propagated by seeds brought from China. Vegetative propagation methods are still improved.
Key words: Propagation by seeds, hardwood, softwood and half-ripen cuttings.
Department of Dendrology and Nursery,
The August Cieszkowski Agricultural University of Poznan, Poland
Szamotulska 28, 62-081 Przezmierowo, Poland
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