o:7235 UTICAJ GUSTINE SETVE NA FORMIRANJE KORENOVOG SISTEMA SEJANICA CRNOG I BELOG BORA INFLUENCE OF SOWING DENSITY TO ROOT SYSTEM FORMATION OF BLACK AND SCOTS PINE SEEDLINGS sr In the article are exposed the results of a study of the influence of density of broadcast sowing of Scots pine seeds and two provenances of black pine seeds on seedling development, with a special reference to the root system formation. It was concluded that the number of seedlings at the end of the first vegetation period correlated with sowing density. The total length of plants was uniform in both species and provenances, disregarding sowing density. The biggest heights of the overground part have reached plants of Scots pine, when compared with black pine seedlings of all sowing densities. The best developed root systems were found in black pine seedlings from Jastrebarsko, which in all sowing densities had the biggest diameters (measured at root-crovn) and root lengths. The anlysis of the coefficients of variation shows that the samples taken for root-weight and number of roots of the I order, were relatively unequal in all species and provenances. In the experiment the densities of 250 and 450 Scots pine seeds per plot (size of the test-plot was 0,25 X 0,25 cm) have shown to be suitable. Still the first density, being more economic, should have an advantage over the second one. In black pine, for the provenance Jastrebarsko the best results were obtained with 350 seeds and for the provenance Titovo Uzice 250 seeds per plot. 2025-03-10T13:10:52.536Z 44 yes 46 Dragica Vilotić application/pdf 3541986 https://unilib.phaidrabg.rs/o:7235 no yes 1 70 92000001 1983 71A07 Zbornik radova Instituta za šumarstvo 20-21 71 79 Institut za šumarstvo 1983