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Analiziranje kvaliteta sjemena i njegovog klijanja ima veliku važnost u proučavanju varijabiliteta pitomog kestena. Ovim analizama se u najranijem uzrastu biljaka može utvrditi obim potencijalne genetičke varijabilnosti vrste. U radu su prikazani rezultati ispitivanja kvaliteta sjemena, direktnim (tehnička klijavost) i indirektnim metodom (ispitivanje vitaliteta embriona pomoću Tetrazolijum testa – TZ-test), za uzorke pitomog kestena iz šest prirodnih populacija sa područja Bosne i Hercegovine (BiH). Ispitivanja su obavljena prema uputstvima „The International Seed Testing Association”. Analizom su obuhvaćene uzastopno dvije kalendarske godine. Utvrđena je niska prosječna vrijednost klijavosti sjemena kao i vitaliteta embriona za sve istraživane populacije u obje godine istraživanja. Poznavanje kvaliteta sjemena važan je faktor za sve koji su uključeni u proces proizvodnje sjemena, a informacija o njegovom kvalitetu omogućava smjernice tokom proizvodnje, trgovine i skladištenja.

The object of this study were three coppice beech stands located in the forest management area “Donjevrbasko” close to Banja Luka in the Republic of Srpska, north-western part of Bosnia and Herzegovina. These coppice stands grow in different conditions. According to available eco-vegetation maps, first beech coppice stand develops in favorable site conditions with high wood production potential for beech. Thereby, we chose such stand which on the first look had fairly good quality of stools. The second coppice stand also grows in good site conditions where high production potential can be expected for beech, but in this case we selected for measurement such stand which has poor technical quality of trees and poor health state. On the contrary, the third coppice stand grows in very poor site conditions where low production potential can be expected for beech. The major goal of the study was to examine the effects of lengthening the rotation periods on wood production, quality and health status of trees in studied coppices.

This paper presents the results of survival in progeny tests in the Republic of Srpska (Bosnia and Herzegovina). Four progeny tests of Norway spruce on sites: Drinić, Derventa, Nevesine and Srebrenica were established on the territory of the Republic of Srpska in 2009. These progeny tests consist of six populations: Han Pijesak 1 and 2, Foča, Potoci, Olovo and Kneževo. The total number of half-sib lines was 36. In this paper, the data collected during 2014 were analyzed and they refer to the survival of Norway spruce seedlings in the progeny test in Drinić. The data were processed in order to determine which populations and half-sib lines are best adapted to ecological conditions of Drinić area. The results indicate a significant variability of survival among the tested populations and half-sib lines. They also indicate a higher adaptability of population originating from geographically more distant provenances from progeny test, in comparison with closer populations. The results can be used for the purpose of transferring the spruce reproductive material from Bosnia and Herzegovina to Drinić area, as well as the sites which are characterized by similar ecological conditions.

Changing ecosystem conditions and diverse socio-economical events have contributed to an ingrained presence of non-native tree species (NNTs) in the natural and cultural European landscapes. Recent research endeavors have focused on different aspects of NNTs such as legislation, benefits, and risks for forestry, emphasizing that large knowledge gaps remain. As an attempt to fulfill part of these gaps, within the PEN-CAFoRR COST Action (CA19128) network, we established an open-access questionnaire that allows both academic experts and practitioners to provide information regarding NNTs from 20 European countries. Then, we integrated the data originating from the questionnaire, related to the country-based assessment of both peer-reviewed and grey literature, with information from available datasets (EUFORGEN and EU-Forest), which gave the main structure to the study and led to a mixed approach review. Finally, our study provided important insights into the current state of knowledge regarding NNTs. In particular, we highlighted NNTs that have shown to be less commonly addressed in research, raising caution about those characterized by an invasive behavior and used for specific purposes (e.g., wood production, soil recultivation, afforestation, and reforestation). NNTs were especially explored in the context of resilient and adaptive forest management. Moreover, we emphasized the assisted and natural northward migration of NNTs as another underscored pressing issue, which needs to be addressed by joint efforts, especially in the context of the hybridization potential. This study represents an additional effort toward the knowledge enhancement of the NNTs situation in Europe, aiming for a continuously active common source deriving from interprofessional collaboration.