Aigars Indriksons

Department of Silviculture, Latvia University of Life Sciences and Technologies, Latvia

2nd International Scientific Conference on Recent Advances in Information Technology, Tourism, Economics, Management and Agriculture – ITEMA 2018 – Graz, Austria, November 8, 2018, CONFERENCE PROCEEDINGS published by the Association of Economists and Managers of the Balkans, Belgrade, Serbia; ISBN 978-86-80194-13-4

Abstract

The work analyses an impact of a drainage system, established in 1939. on overgrown pine tree stand in longer period of time. For the purposes of study 14 sample plots, established by scientists K. Buss and P. Zalitis during the 50’s and the beginning of 60’s, were remeasured. Sample plots were organized in the Myrtillosa turf. mel., Vacciniosa turf. mel., and Callunosa turf. mel. forest site types. Stands basal area increased in all compared forest site types, maximal being 41.7 m2 ha-1 in Myrtillosa turf. mel. forest site type in 2016. Average diameter and average height of a tree in the stand was also bigger in Myrtillosa turf.mel. forest site type plots. The stand volume in Myrtillosa turf. mel. in 2016 was 384.8 m3 ha-1, in Vacciniosa turf. mel. it comprised 326 m3 ha-1, but in Callunosa turf. mel. it was 259.7 m3 ha-1. The average stand volume in 2016 was 323.5 m3 ha-1. Analysis of statistical parameters showed the substantial impact by the forest site type on diameter and height of the tree. For the inventory of ground cover vegetation, the point-square method was used. 37 plant species from 32 ecological groups were detected at Myrtillosa turf. mel. forest site type plots, 26 species from 23 ecological groups – at Vacciniosa turf. mel., and 23 species from 17 ecological groups – at Callunosa turf. mel. forest site type plots. Ellenberg indicator values, Chekanovsky similarity index and Shannon index for ground cover plants showed the changes of ground cover plant coverage caused by forest drainage. Study results confirm the hypothesis: forest drainage has positive impact on overgrown Scots pine stands dendrometrical parameters and stands growing stock increase. The beneficial effect of hydrotechnical melioration continues even 50 years after reaching the cutting age.

Key words

drained forests, Scots pine, dendrometrical indices, tree increment.


References

[1] Laiho R., Vasander H., Penttilä T., Laine J. (2003). Dynamics of plant- mediated organic matter and nutrient cycling following water- level drawdown in boreal peatlands. Global Biogeochem. Cycles 17 (2), 1053, doi:10.1029/2002GB002015.

[2]   Laiho R., Penttilä T., Vasander H., Laine J., Alm J. (2006). Post- drainage Dynamics of P uptake by trees and ground vegetation in Scots pine dominated peatlands. Suoseura- Finnish Peatland Society, Helsinki, Suo 57 (1): pp.1-10.

[3]   Liepa I. (1996). Pieauguma maciba [Increment science]. Jelgava: LLU. 123 lpp. (in Latvian)

[4]   Meza nozare skaitlos un faktos [Forest sector in numbers and facts] (2017). Riga: biedriba „Zalas majas”, p. 5. (in Latvian)

[5]   Meza tipologija (2014): macibu lidzeklis LLU Meza fakultates studentiem un nozares specialistiem [Forest typology: study aid for students of LLU Forest faculty and industry experts]. I. Liepa, O. Miezite, S. Luguza, V. Sulcs, I. Straupe, A. Indriksons, A. Dreimanis, A. Saveljevs, A. Dreska, Z. Sarmulis, D. Dubrovskis. Jelgava: Latvijas Lauksaimniecības universitate, Meza fakultate. Studentu biedriba „Salkone”. p. 118. Meza izglitibas biblioteka. (in Latvian)

[6]   Par Latvijas meziem: Latvijas meza dienests [About Latvian forests: Latvian forest service] [online] [viewed 19.12.2016.]. Available at https://www.lmd.lv/par-latvijas-meziem (in Latvian)

[7]   Pielou E. C. (1969). An introduction to mathematical ecology. New York: John Willey.

[8]   Vides ietekmes novertesanas metodes algoritma apraksts. Meza resursu ilgtspejigas apsaimniekosanas planosanas lemumu pienemsanas atbalsta sistema [Description of the algorithm of the environmental assessment method. Decision support system of sustainable forest management] [online] [viewed 02.05.2018]. Available at: https://maplas.mf.llu.lv/programs/VFIV_algoritma_apraksts.pdf (in Latvian)

[9]   Zalitis P. (1979). Mezaudzes un augsnes hidrologiska rezima parametru izmainas pec nosusinasanas [Changes of parameters of forest stand and soil hydrological regime after drainage]. Jaunakais Mezsaimnieciba 21. Riga: „Zinatne”. pp. 17. (in Latvian)

[10] Zalitis P. (2005). Skuju koku mezi [Coniferous forests]. No: Celvedis Latvijas privato mezu ipasniekiem. Riga: LVMI „Silava”: Et cetera. p. 169. (in Latvian)

[11] Zalitis P. (2006). Mezkopibas prieksnosacijumi [Preconditions of silviculture]. Riga: LVMI „Silava”: Et cetera. p. 219. (in Latvian)

[12]     Zalitis P., Jansons J., Indriksons A. (2013). Mezaudzu parametri hidrotehniski melioretajos mezos pedejos piecdesmit gados [Variations in stand parameters in hydrotechnically drained woodlands over the last fifty years]. Mezzinatne 27(60), pp. 36-66. (in Latvian)

indriksons_development_of_dendrometrical_indices_of_scots_pine_pinus_sylvestris_l._stand_after_the_forest_drainage_pp_1115-1122

Association of Economists and Managers of the Balkans – UdEkoM Balkan
179 Ustanicka St, 11000 Belgrade, Republic of Serbia