Kari Taulavuori1,2,3, Marian Sarala1,2,3, Jouni Karhu1,2,3, Erja Taulavuori1,2,3, Eero Kubin1,2,3, Kari Laine1,2,3, Jarmo Poikolainen1,2,3, Erkki Pesonen1,2,3
1Department of Biology, University of Oulu, PO Box 3000, FIN-90014 Oulu, Finland
2Karhu, Kubin & Poikolainen: Muhos Research Station, Finnish Forest Research Institute, Kirkkosaarentie 7, FIN-91500 Muhos, Finland;
3Vantaa Research Centre, Finnish Forest Research Institute, PO Box 18, FIN-01301 Vantaa, Finland
Tóm tắt
The effect of blue light (400â500 nm) removal on the elongation of Scots pine (Pinus sylvetris L.) seedlings was investigated in a field experiment in Northern Finland during two growing seasons. The seedlings were grown in plexiglass chambers and ambient control plots. The blue wavelengths were removed from the light spectrum by using chambers made of orange plexiglass. The results of nearly daily measurements showed that the elongation of Scots pine seedlings was increased by the removal of blue light only at high latitudes.
