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Khakass Tree Ring Research Laboratory

Long-time dendrochronological expedition

Long-time dendrochronological expedition

2020 September 14-18, staff of our laboratory Zhirnova Dina and Belokopytova Liliana conducted a research expedition to the vicinity of the village Bolshaya Murta in the Krasnoyarsk Territory (100 km north-east of the Krasnoyarsk city) jointly  with colleagues from Siberian Federal University and V.N. Sukachev Institute of Forest.


The sampling was carried out in artificial forest stands of Scots pine, Siberian larch and Siberian spruce, planted at small plots with different initial densities – 18 variants per species from 500 to 128000 trees per 1 ha.


As a result of tougher competition for resources – light, water and nutrients – in heavily dense stands, trees have several times lower height and trunk diameter, and a poorly developed crown. In the most dense stands, a massive dieback of trees was observed, but their current density is still several times higher than that of the initially sparse stands.

 

This unique-scale experiment, observation of the influence of planting density on the forest stand productivity for three species of conifers widespread in Siberia was started in 1982 by the famous forester Alexei Ivanovich Buzykin. Unfortunately, the seedlings of Siberian pine, planted according to the same pattern, did not settled in, and therefore were excluded from the analysis. And now methods of dendrochronology and, possibly, wood anatomy will be added to the spectrum of analysis of the dynamics of these forest stands.


During several days of hard work, more than 500 samples (cores) were collected, 10 for each species and stand initial density. The staff of our laboratory would like to thank Roman Sobachkin (IF SB RAS), Natalia Koshurnikova and Anna Vozmishcheva (SibFU) for their participation in the expedition.


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