COMPARATIVE ANALYSIS OF PINE PLANTATIONS IN TYTUVENAI AND SILUVA FOREST DISTRICTS OF RASEINIAI REGIONAL SUBDIVISION

Abstract

Summary

The research was conducted in 2013-2021, in the plantations of scots pine (Pinus sylvestris L.), located in the state forests of Tytuvėnai and Šiluva forest districts of Raseiniai Regional Subdivision. 26 plots of restored forest were selected for the research, measurements were taken in the autumn of 2019-2021. Field work was performed in accordance with the "Methodology of accounting and valuation of forest seedlings and spalings" (Reguliations for reforestation and afforestation of fores 2020). The seedlings on each plot was accounted for and evaluated using the method of accounting sites (plots - 100 m²). While conducting the research, the density of seedlings was determined at 1thousand / ha, the height of 5 typical individuals (accuracy of 10 cm), the height of each yearly trenches (accuracy of 1 cm), and the thickness of the trunk in the front part (accuracy of 1 mm). After analyzing collected data, it was established that overall best adherence of  seedlings was in the Ncl site - 92%, the highest adherence percentage in the studied areas using 2+1 type seedlings - 91%. The best survival of     seedlings 3 years post planting in the Ncl and Nbl site was 87% each, according to the studied areas the seedlings of type 2+1 also survived best - 84%. 7 years after planting, vegetation was best preserved in the Ncl site - 72%, in the studied areas the best survival was in the vegetation restored with 2+0 type seedlings - 67%.

Keywords: pine, seedling, survival, site.