Wpływ wielkości nasion i głębokości siewu na wschody i wysokość siewek dębów (Quercus robur L. i Q. petraea (Mat.) Liebl.)

The aim of investigations was to establish the effect of sowing depth in the nursery on seedling quality and emergence, depending on weight of Quercus robur and Q. petraea acorns. Carried out researches had a preliminary character because seeds were collected separately only from 5 trees. We found no significant effect on seedling quality and emergence for Q. robur with the largest weight of acorns (mass of 1000 seeds equaling 6660 g) sown at the depth of 9 cm. Such relations had not occurred in Q. petraea. Sowing at the depth of 3−9 cm in the nursery had no significant effect on seedling height within each investigated seed lot. At the greater sowing depths, the dry weight of seedling roots was lower, while dry weight of shoots was higher.