o:8889 Effect of fertilization on leaf morphometriccharacteristics of Paulownia elongata S. Y. Hu and Paulownia fortunei Seem. Hemsl. In the second year of growth Uticaj đubrenja na morfometrijske karakteristike listova vrsta Paulownia elongata S. Y. Hu. i Paulownia fortunei Seem. Hemsl. u drugoj godini rasta en Abstract: This paper presents the results of an analysis of the effect of fertilization in the second year after planting on the morphological characteristics of Paulownia leaves. The results are continuation of the research and possibility of introduction and adaptation of paulownia to different habitats in Serbia. Obtaining of the results regarding quality of the plant leaves in the second year in relation to different fertilization treatments is significant for the technology of cultivation of this species on determined soil types. The research is carried out on two sites. Experimental fields on sites in Obrenovac and Pambukovica have been established with species Paulownia elongata S. Y. Hu. and Paulownia fortunei Seem. Hemsl.. Collecting of leaf material for the analysis in laboratory conditions was carried out within the experimental fields. Measuring of the following morphometric characteristics of leaves were carried out: leaf area, leaf circumference, leaf blade length, central veine length, leaf width on the widest part of leaf blade, leaf width at 1 cm from the leaf base, petiole length, distance between 3rd and 4th nerve, number of nerves on the left side of the central veine, and number of nerves on the right side of the central veine. The obtained results of morphometric measurings of leaves are statistically processed in the program Statgraphics. Morphometric analysis of leaves shows structural-functional connections, i.e. more detailed indicators of the adaptability of the species. Based on these measuring results it was determined that fertilization in the second year of plant development after planting has a positive effect on the size of leaves of analysed species of paulownia. Keywords: fast-growing species, adaptability of species, plant growth and development, introduction of woody species, soil type. 1552099 10.5937/SustFor2592029M 1552101 1821-1046 2025-12-30T09:58:25.156Z 44 yes 46 Suzana Mitrović 0000-0003-1855-4418 46 Milorad Veselinović 0000-0002-2134-7631 46 Snežana Stajić 0000-0001-9023-3542 46 Zoran Poduška 0000-0003-0593-0103 46 Vanja Stojanović 0009-0007-3975-0027 46 Natalija Momirović 0000-0003-3366-5490 46 Marija Milosavljević 0000-0002-0208-5402 application/pdf 656676 https://unilib.phaidrabg.rs/o:8889 no yes 16 70 92000001 71A07 Sustainable Forestry 92 29 46 Belgrade Institute of forestry 2025