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S. Pekeč, B. Vrbek, S. Orlović, B. Kovačević PROIZVODNI POTENCIJALCRNE TOPOLE ... Šumarski list br. 1–2, CXXXV (2011), 29-36


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SUMMARY: The paper presents the results of poplar plants´ growing on the
soil that is not typical for poplar nursery production - on eugley soil. The diameter
and height increments were examined for five clones of black poplar:
´S1-3´ (P. deltoides Bartr ex Marsh), ´B-17´ (P. deltoides Bartr ex Marsh),


´S6-7 ´(P. deltoides Bartr ex Marsh), ´260/81´(P. deltoides Bartr ex Marsh) and
´155/81´(P. × euramericana (Dode) Guinier). This soil type is characterized
by the fact that the layer from the surface down to 60 cm depth, where the largest
mass of roots of seedlings is formed, contains the highest percentage of the
total content of clay and silt, and the worst water-air conditions. The texture
classes by the soil profile downwards were: silty loam, clay loam and loamy
sand. In this type of soil, we observed low survival of cuttings of the examined
black poplar clones that, at the end of the growing season, ranged from
63.7–69.4%. There was no significant difference in cutting survival among
them. The least significant differences test at the level of risk of 5% divided
examined clones in two groups by shoot height: clones ´S1-3´and´B-17´with a
194–197 cm and the clones´S6-7´,´260/81´and ´155/81´with a 157–168 cm
shoot height. The mean diameters were uniform and varied in the range from


12.1 to 13.5 mm. Diameter and height growth of clones varied depending on
clones, and the most of seedlings at the end of the growing season were classified
in 2nd(2,01 to 2,50 m) and 3rd(1,51 to 2,00 m) height class. Unsatisfactory
cutting survival, height and diameter plants increments and lower dimensions
of rooted cuttings at the end of the growing season could be primarily attributed
to the relatively bad water and air conditions of eugley soil.