Effect of soil bulk density on forest tree seedlings

摘要: A b s t r a c t. The paper presents the results of an analysis influence soil bulk density in forest nursery plot on growth and quality parameters Scots pine European beech seedlings. Particular variants were obtained using tractor device exerting controlled pressure soil, while field examinations performed area ‘Klaj’ Niepolomice Forest District. Three series plots prepared for each species, applying unit values 50, 100, 150, 200, 250 kPa, corresponding to dry range 1.03-1.19 g cm -3 , control without pressure. Seeds examined species sown plots, after 6 months seedlings subjected biometric determining differentiation root neck diameter, length above-ground part system, as well mass particular parts plant. was also determined method Schmidt-Vogt. show that change significantly affected most Especially high negative correlations system. signifi cant variant all seedlings, some demonstrated. An increase clearly caused deterioration quality. K e y w o d s: density, seedling parameters, quality, pine,