INFLUENCE OF THINNING CUTTINGS ON THE FORMATION OF CLEAN SPRUCE STANDS
UDC 630*242
Key words: competition, thinning, spatial structure, radial growth, core.
For citation: Kotsan V. V., Sevko O. A., Yaronskaya T. L. Influence of thinning cuttings on the formation of clean spruce stands. Proceeding of BSTU, issue 1, Forestry. Nature Management. Processing of Renewable Resourses, 2021, no. 2 (246), pp. 5–11 (In Russian). DOI: https://doi.org/10.52065/2519-402X-2021-246-1-5-11.
Abstract
The influence of the spatial structure indicators on the growth of the stand is pronounced during the thinning felling period. In order to study this phenomenon in the sorrel spruce forest at the age of 42 years, in which the thinning felling was carried out earlier, a test plot was laid. Based on the digital model of the trial plot, the average taxation and spatial indicators of trees were determined, cores were taken from 21 trees on the basis of a stratified sample and the average periodic radial growth over 10 years was determined.
The relationship between the trunk diameter and the average distance to competitors 'trees shows an increase in the range of variation in the trunk diameter with an increase in the average distance to competitors' trees. The boundary value of the distance of 1.8 meters was determined, after which the range of variation doubles. An analysis of the average distance to competitors from their number revealed that an increase in the average distance between competitors to 1.5 meters leads to an increase in their number, a further increase in this indicator does not have this effect.
The study of trunk diameter differentiation shows that trees with minimal diameters are surrounded by dominant trees, trees with a diameter close to the average are surrounded by similar trees, and large trees are adjacent to trees of different diameters. Analysis of the dynamics of radial growth confirms the influence of thinning felling on its growth. After the felling, the previously decreasing radial increment stopped at the same level for 3 years and then began to increase.
References
- Pravila rubok v lesakh Respubliki Belarus’ [Rules for felling in the forests of the Republic of Belarus]. Minsk, Minleskhoz Respubliki Belarus’ Publ., 2016. 93 p.
- Sankovich M. M., Yanushko A. D. Organizatsiya proizvodstva i upravleniye predpriyatiyem lesnogo khozyaystva [Organization of production and management of a forestry enterprise]. Minsk, BGTU Publ., 2004. 271 p.
- Antonov O. I. Improving the qualitative productivity of plantations is the task of intensive forestry. Lesnoy zhurnal [Forest Journal], 2017, no. 1, pp. 86–94 (In Russian).
- Boyko S. V. Types of tree placement in natural pine forests. Problemy lesovedeniya i lesovodstva [Problems of forestry and forestry]. Gomel’, Institut lesa NAN Belarusi Publ., 2011, pp. 355–359 (In Russian).
- Buzykin A. I. Analiz struktury drevesnykh tsenozov [Analysis of the structure of tree cenoses]. Novosibirsk., Nauka Sibirskoye otdeleniye Publ., 1985. 80 p.
- Gribanov V. Ya. The spatial structure of pine and deciduous trees. Produktivnost’ lesnykh fitotsenozov [Productivity of forest phytocenoses]. Krasnoyarsk, ILID Publ., 1984, pp. 42–47 (In Russian).
- Kaźmierczak K. Tree crown size as a measure of tree biosocial position in 135-year-old oak (Quercus L.) stand. Folia Forestalia Polonica, series A, 2016, vol. 58 (1), pp. 31–42 (In Poland).
- Usol’tsev V. A., Semyshev M. M. Produktsionnyуe kharakteristiki s uchetom konkurentsii derev’yev v iskusstvennykh i estestvennykh sosnyakakh: sravnitel’nyy analiz [Productive characteristics taking into account the competition of trees in artificial and natural pine forests: a comparative analysis]. Ekaterinburg,
UrO RAN Publ., 2007. 137 p. - Kotsan V. V. Produktivnost’ sosnyakov mshistykh iskusstvennogo proiskhozhdeniya razlichnoy prostranstvennoy struktury v lesorastitel’nykh usloviyakh Belarusi. Avtoref. dis. … kand. s.-kh. nauk [Productivity of mossy pine forests of artificial origin of different spatial structure in forest conditions of Belarus. Abstract of thesis PhD (Agriculture Science)]. Minsk, 2016. 22 p.
- Rozwój metod trzebieżowych: Otwarta Encyklopedia Leśna : lesne forum. Available at: http://www.en-cyklopedia.lasypolskie.pl/doku.php?id=r:rozwoj-metod-trzebiezowych/ (accessed 10.02.2021).
- Davydov A. V. Rubki ukhoda za lesom [Forest thinning]. Moscow, Lesnaya promyshlennost’ Publ., 1971. 184 p.
- Vays A. A. Nauchnye osnovy otsenki gorizontal’noy stryktury drevostoyev dlya povysheniya ikh ustoychivosti i produktivnosti. Dis. dokt. … s.-kh. nauk [Scientific basis for assessing the horizontal structure of forest stands for increasing their stability and productivity. Diss. DSc (Agriculture Science)]. Krasnoyarsk, 2014. 25 p.
- Prokoptsev V. V. Lesovodstvenno-taksatsionnyy analiz rosta i prostranstvennoy struktury sosnyakov zelenomoshnikov Bryanskogo massiva v svyazi s rubkami ukhoda. Avtoref. dis. kand. … s.-kh. nauk [Silvicultural-taxation analysis of the growth and spatial structure of green moss pine forests in the Bryansk
massif in connection with thinning. Abstract of thesis PhD (Agriculture Sciense)]. Bryansk, 1997. 21 p. - Assmann E. Waldertragskunde. Organische Produktion, Struktur, Zuwachs und Ertrag von Waldbeständen. Munchen, Bonn, Wien, Verlagsges, 1961. 490 p.
- Nesterenok M. S., Nesterenok V. F., Poznyak A. S. Geodeziya [Geodesy]. Minsk, Universitetskaye Publ., 2001. 312 p.
- Shebushev A. V. Use of new forest inventory tools for forest inventory. 70-ya nauchnoteckhnicheskaya konf. uchashchkikhsya, studentov i magistrantov [70th scientific and technical conference of pupils, students and undergraduates]. Minsk, 2019, pp. 132−136 (In Russian).
