Effects of pretreatment, sowing time, sowing environment and climate factors on germination in Acer pseudoplatanus L.

In this study, the effects of different sowing environment (greenhouse and nursery), pretreatment (cold moist stratification), time (autumn, spring summer) some climate factors (air temperature, relative air humidity, soil temperature moisture) on germination Acer pseudoplatanus L. seeds were studied. Seeds harvested from tree located in Karadeniz Technical University campus. Three trials carried out; (1) direct autumn after seed collection (Control), (2) stratified (Stratification-1) (3) summer (Stratification-2). During trial processes, moisture measured periodicaly. Thus, percentage changes environments have been established basis factors. Higher percentages obtained (Control) compared to (Stratification-2) sowings. The highest ­determined control (70% greenhouse 58% nursery). Obtained results based times revealed secondary dormancy seeds. It has determined that mean (12 days) was shorter than nursery (18 days). addition, showed stratification a positive effect greenhouse. Because getting best rates, keeping ­factors constant (21.0-24.9 °C temperature; 17.0-19.9 63.0-68.9% humidity; 60.0-67.9% during vegetative propagation practices greenhouse, should affect mass ­seedling production