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Forest plantations for wood growing in the European north of Russia

XV World Forestry Congress, 2-6 May 2022









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    Modelling pine and spruce wood mechanical properties in different initial stand density plantations in Lithuania
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Two main parameters of wood quality in constructions are wood modulus of elasticity (MOE) and bending strength (MOR). To understand what kind of quality wood we are growing in our forests and how environment and forest management could affect wood quality parameters, we need to model these parameters by stand, tree, and sample results. This would help to predict MOE and MOR for the future stands.
    To determine the influence of stand density and thinning intensity on wood mechanical and physical properties of Scots pine and Norway spruce, the data was obtained from experimental trials plots, which were established in 1990 by Institute of Forestry. The experimental object was divided to a smaller trial plots with different initial stand density: 2 plots with 3000-4400 trees per hectare, 2 plots with 2000-2400 trees per hectare, 2 plots with 1000-1200 trees per hectare. In these trial plots different thinning programs were used 3; 2; 1 time. From each trial plot 6 model trees were chosen (38 Spruce and 76 Pine trees).
    Models were created by SAS statistical package. General linear regression models were chosen to create 4 models for prediction of: dynamic modulus of elasticity for log (MOElog); dynamic modulus of elasticity for samples (MOEdyn); global static modulus of elasticity (MOE) and bending strength (MOR) All parameters for creating models were chosen as random effects. Stand parameter was stand density (SD). Tree parameters were diameter at breast high (DBH), competition index (CI), average ring width (RD), average ring density (RD) and log high (LH). Sample parameters were knot at fracture point (K) and sample wood density (WD).
    Best result for MOE models was in pine stand R2=0,82 spruce stand R2=0,85. R2=0,57 was in pine stand for MOR and R2=0,65 in spruce stand. Keywords: Sustainable forest management, Research ID: 3484790
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    Selection on a drought tolerance and using its results for adaptation of pine forests to climate change
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Forest-steppe region of European Russia belongs to the zone of highly productive pine forests. Relevance of research answers sub-theme of Forestry Congress “forests’ role in addressing global environmental challenges, including climate change and biodiversity conservation”. Conclusions and practical recommendations are based on the results of 34-years monitoring and 12-years self-pollination experience at Scots pine. Main elements of pine seed reproduction systems are self-fertility, proportion of plump seeds and number of seeds per cone. These are genetically determined and environmentally dependent traits with different sensitivity to drought. Their equilibrium state ensures the stability of species seed reproduction system. Drought leads to yield decrease of pine forests, differentiation of trees by drought tolerance degree. Genotypic correction is connected with the unequal contribution of resistant and sensitive trees to the year seed production. To softening the climate change consequences for newly created pine forests, it is recommended to use seeds of drought-tolerant variety of pine ‘Ostrogozhskaya’ (patent No 9187) for reforestation. It is also necessary to draw the seed genotypic composition of optimal years closer to their natural structure of years. For this purpose, it is required to increase the proportion of seeds from drought-tolerant forms by 10-30%. This would make it possible to retain the gene pool of best local populations and increasing their stability in the next generations of forest. Institute has an assortment of drought-resistant forms of Scots pine. Pre- adapted seeds have a sufficient reserve of ecological capacity and a balanced genotypic composition to ensure the genetic diversity and stability of pine forests to climate change. Keywords: Climate change; adaptive selection; Scots pine; seed reproduction systems; drought-tolerant variety ID: 3488667
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    The development prospect of coppiced dalbergia plantation in Indonesia
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Dalbergia latifolia Roxb. is a premium wood traded in the international market as Rosewood, and currently included in the CITES Appendix II. In Indonesia, D. latifolia is suitable and popular to be intercropped within agroforestry system. However, the species is generally considered as too slow-growing to be preferred to timber plantation trees. Thus, promoting private, community and government plantations is necessary to support future timber stock and gene conservation. This study was aimed to examine the possibility of establishing coppiced D. latifolia plantation. This study involved observation and measurement in the field and nursery. Field observation and measurement were carried out both in a private and national forested land in West, Central and East Java of Indonesia, while propagation trials were conducted at a nursery in Bogor–West Java. Field observation indicated that certain population from West Java showed faster growth that in the 3-4-year- the trees reached 15-27 cm in DBH. Vegetative propagation trials showed that root cutting is more prospective that that of shoot cutting (sprouting ability >90%). Experiment on root growth from planting stocks originated from root cutting produced massive lateral roots (total root length 4 m - 8 m within six month). Small roots with 4 m – 5 m in length can be source for producing new individuals. Field observation also revealed that the stumps produced 3 - >20 sprouts that can further utilize as shoot cutting sources and among them (1-3 sprouts) would develop into new individual and take the role as new main stem replacing the previous harvested one. Thus, it is prospective to develop a coppiced plantation of D. latifolia which will be beneficial in term of ecology and economy. The slow-growing tree term previously accepted in general term may not be applied as at suitable habitat they may grow aggressively and categorize as fast growing with the diameter increment can achieve 4–7 cm/year. Keywords: rosewood, plantation, propagation, regeneration potential, sprouts ID: 3486358

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