the bark is smooth for a long time, yellowish-brown
the bork is brownish-grey, firm, deeply cracked
Buds
buds are erected in a spiral, sessile
multi-scale, yellow-brown, sticky
leaf buds are oblong-ovate, sessile, long-pointed, pressed to the twig, 8-10 x 4-5 mm in size
flower buds are significantly larger, protruding
Shoots
annual growths round, greenish-yellow
numerous brachyblasts on older twigs
Leaves (assimilation organs)
they are simple, rhombic to deltoid ones
6 - 10 x 4 - 8 cm large, long-pointed, coarsely serrated around the edge
stalk is 3-5 cm long, compressed from the sides
Flowers
dioecious tree species
flowers are catkins
blooms in III - IV before foliage
Fruits – seeds
the fruit is a capsule
seed – fluffy achene
Extension
extensive Euro -Asian complex
in Slovakia along watercourses in warmer areas
it grows mainly on alluviums in the valleys of rivers
Ecology
light woody
it requires enough moisture and higher levels of flowing groundwater (but also permanently clouded soil)
it can stand flooding
it is growing well on sandy and gravel-like deposits
Significance
the production of high-quality wood is used by crosses (clones) of black European and American poplars (such as: Robusta, Regenerata, Generosa, I-214, I-123, ... )
the wood of crosses is of high quality, nuclear, suitable for making veneers, plywood, but also cellulose
crosses of a black poplar are characterized by rapid growth - reversal maturity reach before the twenty year of growth
the way of the development of crosses (clones) ) of black poplar:
by the development of the formation of crosses (clones) ) of black and American poplars we get high -quality individuals – clones
we take their cuttings
we set up a head kindergarten
from the heads of clones in the kindergarten we obtain cuttings
From the cuttings we grow clone seedlings, which we plant
it is also used in planting into windlams
the formation of greenery it is used its narrow columnary form of so called Walnite poplar (Populus nigra - pyramidalis)
