Full text of this article is only available in PDF format.

Aarne Nyyssönen (email)

Vertailevia havaintoja hoidettujen ja luonnontilaisten männiköiden rakenteesta ja kehityksestä

Nyyssönen A. (1950). Vertailevia havaintoja hoidettujen ja luonnontilaisten männiköiden rakenteesta ja kehityksestä. Silva Fennica no. 68 article id 4600. https://doi.org/10.14214/sf.a9091

English title: Comparative study on structure and development of managed and natural Scots pine stands

Abstract

The Forest Research Institute of Finland has established permanent sample plots to survey the effect of thinnings on the stands. This study compares the development of tended and natural Scots pine (Pinus sylvestris L.) stands growing on three different forest types: Oxalis-Myrtillus, Vaccinium and Calluna site type. The effect of heavy thinning from below (Oxalis-Myrtillus and Vaccinium site types) and increment felling (Calluna site type) was assessed by dividing the trees of the stands in tree classification classes according to their crown storey and defects.

The results show that thinning from below and increment thinning increase the proportion of trees in the 1st crown storey, which is already large in the natural stands. Also the diameter distribution is more even and the mean diameter higher after the thinnings.

In Scots pine stands in natural state, volume increment per stem is highest in the 1st crown storey and diminishes strongly towards the lower crown storeys. Thinnings increased the increment. The study indicates that many of the objectives of the intermediate cuttings, including promoting the growth of the best trees and improving the quality of the stand, have in general been achieved. Consequently, the thinnings give means to achieve the most valuable yield in the stand.

The article includes a summary in English.

Original keywords
hakkuut; mänty; Pinus sylvestris; harvennushakkuu; kasvupaikkatyyppi; harvennus; luonnometsä; alaharvennus; läpimitan kasvu; tilavuuskasvu; latvuskerros

English keywords
natural forest; Scots pine; thinnings; diameter growth; fellings; increment; thinning from below; forest type; crown storey; tree classification

Published in 1950

Views 1481

Available at https://doi.org/10.14214/sf.a9091 | Download PDF

Creative Commons License CC BY-SA 4.0

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Nyyssönen A., (1979) International contacts of Finnish forest research Silva Fennica vol. 13 no. 4 article id 5050
Nyyssönen A., (1979) Assessment of forest resources for forest manage.. Silva Fennica vol. 13 no. 3 article id 5045
Nyyssönen A., (1973) Book review: Forest inventory Silva Fennica vol. 7 no. 4 article id 4892
Nyyssönen A., (1969) Co-operation between research workers at the uni.. Silva Fennica vol. 3 no. 2 article id 4792
Nyyssönen A., Poso S. (1962) Tree stand classifications from aerial photograp.. Silva Fennica vol. no. 112 article id 4705
Nyyssönen A., (1950) Comparative study on structure and development o.. Silva Fennica vol. no. 68 article id 4600
Nyyssönen A., Poso S. et al. (1968) The use of aerial photographs in the estimation .. Acta Forestalia Fennica vol. 82 no. 4 article id 7177
Nyyssönen A., Kilkki P. et al. (1967) On the precision of some methods of forest inven.. Acta Forestalia Fennica vol. 81 no. 4 article id 7169
Nyyssönen A., Kilkki P. (1966) Estimation of strata areas in forest survey Acta Forestalia Fennica vol. 81 no. 3 article id 7168
Nyyssönen A., Kilkki P. (1965) Sampling a stand in forest survey Acta Forestalia Fennica vol. 79 no. 4 article id 7162
Nyyssönen A., (1963) Analysis of two alternative methods for national.. Acta Forestalia Fennica vol. 76 no. 6 article id 7146
Nyyssönen A., Vuokila Y. (1963) The effect of stratification on the number of sa.. Acta Forestalia Fennica vol. 75 no. 2 article id 7136
Kuusela K., Nyyssönen A. (1962) The cutting budget for a desirable growing stock Acta Forestalia Fennica vol. 74 no. 6 article id 7133
Nyyssönen A., (1959) Finnish research in the fields of forest mensura.. Acta Forestalia Fennica vol. 70 no. 6 article id 7496
Nyyssönen A., (1959) Finnish research in the fields of forest mensura.. Acta Forestalia Fennica vol. 70 no. 5 article id 7495
Nyyssönen A., (1954) Structure and development of Scots pine stands t.. Acta Forestalia Fennica vol. 60 no. 4 article id 7411
Holopainen V., Nyyssönen A. et al. (1984) The 75th Anniversary volume of the Society of Fo.. Acta Forestalia Fennica vol. 0 no. 190 article id 7645
Nyyssönen A., Ojansuu R. (1982) Assessment of timber assortments, value and valu.. Acta Forestalia Fennica vol. 0 no. 179 article id 7626
Nyyssönen A., Mielikäinen K. (1978) Estimation of stand increment Acta Forestalia Fennica vol. 0 no. 163 article id 7597
Nyyssönen A., Roiko-Jokela P. et al. (1971) Studies on improvement of the efficiency of syst.. Acta Forestalia Fennica vol. 0 no. 116 article id 7550