Jaana Luoranen 
,
Juha Lappi,
Gang Zhang,
Heikki Smolander
Field performance of hybrid aspen clones planted in summer
Luoranen J., Lappi J., Zhang G., Smolander H. (2006). Field performance of hybrid aspen clones planted in summer. Silva Fennica vol. 40 no. 2 article id 342. https://doi.org/10.14214/sf.342
Abstract
We investigated the possibility to plant clonal hybrid aspen (Populus tremula x tremuloides) during the summer of propagation when the plants are 20–25 cm tall and only a few months old. In four experiments carried out in years 1998–2001, survival of summer-planted hybrid aspens was at least as high as that of hybrid aspen planted in autumn and spring. In all experiments, compared to planting in September or the following May, height growth was greater with planting in July and early August. Root egress of hybrid aspens planted in July and August was also greater than that of aspens planted in autumn or the following spring. Summer planting was thus possible both with plants produced by micropropagation and with those produced from root cuttings.
Keywords
survival;
Populus;
growth;
hybrid aspen;
micropropagation;
planting date;
root cutting;
root egress;
survivalgrowth
-
Luoranen,
Finnish Forest Research Institute, Suonenjoki Research Unit, Juntintie 154, FI-77600 Suonenjoki, Finland
E-mail
jaana.luoranen@metla.fi
- Lappi, Finnish Forest Research Institute, Suonenjoki Research Unit, Juntintie 154, FI-77600 Suonenjoki, Finland E-mail lj@nn.fi
- Zhang, College of Horticulture, Agricultural University of Hebei, Baoding, Hebei, China E-mail gz@nn.cn
- Smolander, Finnish Forest Research Institute, Suonenjoki Research Unit, Juntintie 154, FI-77600 Suonenjoki, Finland E-mail hs@nn.fi
Received 11 April 2005 Accepted 3 January 2006 Published 31 December 2006
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