1. Tree and stand growth differ among soil classes in semi-natural forests in central EuropeAndrej Bončina, Matija Klopčič, Vasilije Trifković, Andrej Ficko, Primož Simončič, 2023, original scientific article Abstract: We determined the size of differences in stand and tree growth in semi-natural forests with respect to 16 reference soil groups. The forest area of Slovenia (11.8 thousand km2) was used as the study area, and reference soil units were derived from the national soil map at a 1:25,000 scale consisting of 10,781 polygons with an average size of 117.95 ha. Stand growth was defined as periodic stand basal area increment, while the growth of Norway spruce, silver fir, Scots pine, European beech and sessile oak trees was estimated by the periodic diameter increment of 238,349 dominant trees on 67,061 permanent sampling plots. A linear fixed-effects model and linear mixed-effect models were used for studying stand and tree growth in different site, stand and tree conditions. The soil unit was the dummy variable with Dystric Cambisols set as the reference category. Soil contributed 4.3 % to the explained variability of basal area increment and 4–27 % to the explained variability of the diameter increment of the five tree species. Soil was a stronger driver of stand and tree growth than climate or topography. Stand and tree species production rate on soil units was in the interval of −28 % to +5 % and −47 % to +14 % of that on the reference soil unit, respectively. Stand growth was the highest on Eutric Gleysols and the lowest on Histosols, and tree species generally exhibited the highest and the lowest growth rates on different soil units. We suggest that soil should be considered in growth models and studied interrelatedly with climatic, site and stand variables. Keywords: reference soil groups, FAO soil unit, natural forest, stand growth, tree growth Published in DiRROS: 29.12.2022; Views: 603; Downloads: 298 Full text (2,23 MB) This document has many files! More... |
2. Cultivation and utilization of Poplars, Willows and other fast-growing trees in Slovenia : report of the National Poplar CommissionGregor Božič, Andreja Ferreira, Anže Martin Pintar, Gordana Beltram, Marko Kovač, Darja Istenič, Špela Ščap, Marjana Westergren, Marko Bajc, Daniel Zorko, Simon Verebič, Nikica Ogris, Hojka Kraigher, 2020, treatise, preliminary study, study Keywords: Poplar, Willow, Black Walnut, Black Locust, international commission, FAO, national report, questionnaire, genetics, forest protection, legislation, categorisation, forest products, ecology, Slovenia Published in DiRROS: 11.12.2020; Views: 1399; Downloads: 420 Full text (624,71 KB) |
3. Questionnaire on poplars and other fast-growing trees sustaining people and the environment 2016 - 2019 : report of the National Poplar CommissionGregor Božič, Andreja Ferreira, Anže Martin Pintar, 2020, treatise, preliminary study, study Keywords: Poplar, Willow, Black Walnut, Black Locust, international commission, FAO, national report, questionnaire, genetics, forest protection, legislation, categorisation, forest products, ecology, Slovenia Published in DiRROS: 11.12.2020; Views: 1339; Downloads: 418 Full text (147,28 KB) |
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5. Zaključno poročilo: UN - ECE/FAO temperate and boreal forest resources assessment 2000 for SloveniaMilan Hočevar, Leon Behin, Maja Jurc, Marko Kovač, Franc Ferlin, Lado Kutnar, Miran Čas, Gregor Božič, Mirko Medved, Andreja Ogulin, 1999, final research report Keywords: gozd, gozdarstvo, gozdna inventura, gozdno lastništvo, zdravstveno stanje, funkcija gozda, biološka pestrost, Slovenija, FAO projekt Published in DiRROS: 12.07.2017; Views: 3285; Downloads: 694 Full text (6,73 MB) |