Natural renewal of the forest in drained pine forests, passed by complex logging
https://doi.org/10.21266/2079-4304.2024.249.87-102
Abstract
Experimental complex felling was carried out in pine forests of different ages in 1984, 17 years after the construction of canals on the upland peat bog. The old-growth part of the stand was removed, and thinning was carried out in the young part. In the year of felling, pine undergrowth was available in all areas in the amount of 7-10 thousand specimens per hectare. Over the next 15 years (by 1999) the amount of pine undergrowth decreased to 0.2-3.3 thousand ind. per hectare. Apparently, the main reason was the increased competition for light and soil nutrients from the intensively growing stand. Birch undergrowth was formed in 15 years after felling in all areas in the amount of 0.4-4 thousand specimens per hectare. After another 15 years (2014), the density of birch in most areas increased to 2-5 thousand ind./ha, and by now (2023) this amount has not changed much. Thus, it is confirmed that the young generation of birch is better adapted to new conditions on drained objects compared to pine. There is more birch undergrowth near the canals, where the light and nutritional regime is better. In the year of felling, spruce undergrowth was found sporadically. By 1999, the density of spruce undergrowth in some areas was 0.1-0.4 thousand specimens per hectare, and in the future it almost did not increase. Despite the extremely small amount of spruce undergrowth and its uneven distribution over the area, over the past 15-25 years there has been practically no loss of it.
About the Authors
A. P. Smirnov
St. Petersburg State Forestry University
Russian Federation
Russian Federation
Alexander P. Smirnov - DSc (Agricultural), Professor, Department of Forestry, St. Petersburg State Forestry University.
Institutskiy per. 5, St. Petersburg, 194021
A. A. Smirnov
St. Petersburg State Forestry University
Russian Federation
Russian Federation
Alexey A. Smirnov - PhD (Agricultural), Associate Professor of the Department of Forest Taxation, Forest Management and Geographic Information Systems, St. Petersburg State Forestry University.
Institutskiy per. 5, St. Petersburg, 194021
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Review
For citations:
Smirnov A.P., Smirnov A.A. Natural renewal of the forest in drained pine forests, passed by complex logging. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2024;(249):87-102. (In Russ.) https://doi.org/10.21266/2079-4304.2024.249.87-102
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