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Title: ASSESSMENT OF THE QUALITY AND PRODUCTIVITY OF LODGEPOLE PINE GROWN IN THE WESTERN PART OF LATVIA
ASSESSMENT OF THE QUALITY AND PRODUCTIVITY OF LODGEPOLE PINE GROWN IN THE WESTERN PART OF LATVIA

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Linards Sisenis; Irina Pilvere; Baiba Jansone; Edgars Dubrovskis
10.5593/sgem2024/3.1/s14.42
10.5593/sgem2024/3.1
1314-2704
978-619-7603-70-5
English
24
3.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Forest Ecosystems
The research aims to examine the pace of growth of lodgepole pine, the amount of damage caused by biungulates and the quality of trunks for lodgepole pine provenances growing in the western part of Latvia in the areas around Ugale and Kuldiga, identifying the most damage-resistant and promising provenances for cultivation in Latvia.
In Latvia, foresters and plant breeders have been working for years to increase the quality and productivity of local tree species, while assessing various forest stand management patterns and trying to reduce the rotation period of stands. Nowadays, because of climate change, i.e. with the climate becoming warmer, it is clear that in the future in Latvia not only a management strategy for the dominant tree species have to be changed but also the possibilities of introducing new tree species suitable for the conditions in Latvia need to be considered to reduce the forest rotation period. At the same time, introducing new tree species requires considering that the tree species must have economic potential, i.e. the wood has prospects for being processed and consumed (e.g. construction) in the local region, as carbon is sequestrated during the growth of the trees and stays in Latvia. Lodgepole pine is one of the tree species that could have prospects for cultivation on an industrial scale in plantations, which was introduced in Latvia at the beginning of the last century. Based on the experience of Swedish foresters in growing lodgepole pine on an industrial scale in the 1980s, experimental lodgepole pine plantations were established in Latvia by using both domestic seeds and those from the natural range in Canada and the United States, as well as from Sweden.
The research analysed the following tree inventory data collected from the experimental plantations of lodgepole pines at the ages of 27 and 43 years in the western part of Latvia: the height and diameter of the trees and compared the data for Scots pine grown in identical conditions. In addition, the proportions of trees damaged by deer etc. as well as the proportions of trees with multiple tops and branch-to-stem attachments because these defects significantly reduce the chances of producing quality roundwood assortments in the future were analysed for both species. The data were processed using parametric methods.
In an experimental plantation in the area near Ugale, 43-year-old lodgepole pines demonstrated a performance similar to that of Scots pines, with average heights of 18.2 and 18.4 meters and diameters of 19.1 and 19.0 cm, respectively, i.e. the differences were insignificant. In the plantation near Kuldiga, the differences were found significant, as the average height difference between the species was 1.3 m, while the diameter difference was 1.3 cm. It was concluded that lodgepole pines had lower trunk quality and were more damaged by deer. It was also found that the least productive lodgepole pine provenances were more damaged by deer.
[1] Matisons, R., Krisans, O., Jansone, D., Jansons, A. and Zeltins, P. (2024) The genetic and environmental variance of radial increment in Scots pine of south-eastern Baltic provenances in response to weather extremes. Baltic Forestry 30(1), https://doi.org/10.46490/BF719
[2] Kitenberga M., Matisons R., Jansons A., Donis J. (2018). Teleconnection between the Atlantic sea surface temperature and forest fires in Latvia and Estonia. Silva Fennica, 52 (1 ), article id 7771. 8 p. https://doi.org/10.14214/sf.7771
[3] Donis J., Saleniece R., Krisans O., Dubrovskis E., Kitenberga M., Jansons A. (2020) A financial assessment of windstorm risks for Scots pine stands in hemiboreal forests. Forests, 11, 566; doi:10.3390/f11050566
[4] Baders E., Jansons, A., Matisons R., Elferts D., Desaine I. (2018) Landscape diversity for reduced risk of insect damage: a case study of Spruce bud Scale in Latvia. Forests, 9, 545; doi:10.3390/f9090545
[5] Silins I.; Karklina A.; Miezite O., Jansons A. (2021) Trends in Outbreaks of Defoliating Insects Highlight Growing Threats for Central European Forests, and Implications for Eastern Baltic Region. Forests 2021, 12, 799. https:// doi.org/10.3390/f12060799
[6] Prieditis A., Howlett S.J., Baumanis J., Bagrade G., Done G., Jansons A., Neimane U., Ornicans A., Stepanova A., Smits A., Zunna A., Ozolins J. (2017) Quantification of deer browsing in summer and its importance for game management in Latvia. Baltic Forestry, 23(2), 423-431.
[7] Donis, J.; Snepsts, G.; Zeltins, P.; Jansons, J.; Zalitis, P.; Jansons, A. (2024) Sawlog Recovery in Birch, Black Alder, and Aspen Stands of Hemiboreal Forests in Latvia. Forests 15, 326. https://doi.org/10.3390/f15020326
[8] Gailis A., Karklina A., Purvins A., Matisons R., Zeltins P., Jansons A. (2020) Effect of breeding on income at first commercial thinning in silver birch plantations. Forests 2020, 11, 327; doi:10.3390/f11030327
[9] Jansons A., Matisons R., Senhofa S., Katrevics J. Jansons J. (2016) High-frequency variation of tree-ring width of some native and alien tree species in Latvia during the period 1965–2009. Dendrochronologia, 40, 151–158.
[10] Libiete Z., Matisons R., Rieksts-Riekstins J., Prieditis A., Jansons J., Smilga J., Done G., Jansons A. Aboveground biomass equations of 40-year-old Norway spruce in Latvia. Baltic Forestry, 23(2), pp 515-521, 2017.
[11] Vuguls, J.; Dubra, S.; Garanca, A.; Zute, D.; Jansons, A. Management of Birch Spruce Mixed Stands with Consideration of Carbon Stock in Biomass and Harvested Wood Products. Forests 2023, 14, 57. https://doi.org/10.3390/f14010057
[12] Jansons A., Sisenis L., Neimane U., Rieksts-Riekstins J. (2013) Biomass production of young lodgepole pine (Pinus contorta var. latifolia) stands in Latvia. iForest – Biogeosciences and Forestry, 6, 10-14
[13] Irbe I., Sable I., Treimanis A., Jansons A. (2013) Variation in the Tracheid Dimensions of Scots Pine (Pinus sylvestris L.) and Lodgepole Pine (Pinus contorta Dougl. var. latifolia Engelm) Trees Grown in Latvia. Baltic Forestry, 19(1), 120 – 127.
[14] Libiete Z., Jansons A., Rungis D., Donis J. (2023) Forest resources and sustainable management. In: Fred O. Asiegbu and Andriy Kovalchuk (eds.) Forest Microbiology: Tree Diseases and Pests. Elsevier, pp. 3-32. ISBN 978-0-443-18694-3
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https://doi.org/10.5593/sgem2024/3.1/s14.42
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Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024
24th International Multidisciplinary Scientific GeoConference SGEM 2024, 1 - 07 July, 2024
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
357-366
1 - 07 July, 2024
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lodgepole pine, productivity, trunk quality, damage by deer

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