Invigoration and IDS-Sedimentation of Pinus sylvestris Seeds from Northern Finland

1988

3 Abb., 12 Lit. Ang.

Unselbständiges Werk

2767

200014346

Seeds with poor, anatomical development from Rovaniemi, (Formel): 180 m a.s.l. were conditioned using the subsequent treatments: 1. PREVAG method (5 min, 97 kPa below atmospheric pressure) for removal of mechanically damaged seeds (7%). 2. Invigoration using incubation at controlled moisture content (30% f.w.) and continuous air supply, for 14 days at 5C. 3. Additional water supply for 16 hours at 5C. 4. Drying in dehumidified air until a near maximum difference in density between viable and dead seeds was obtained. 5. Separation in a sedimentation flume to achieve a gradient of fractions of different germinatin rate and capacity. The treatments resulted in an improvement of germination percentage from 33 to about 95% and a reduction in mean germination timefrom 8.8 days to 6 days if the control and the best fractions (32% seeds) were compared.