Structure and yield of all-sized and even-sized Scots pine-dominated stands

Summary — This study is based on material collected in southwestern Finland using a systematic temporary circular plot line survey method. A total of 273 sample plots were included in the study. These plots represented Scots pine (Pinus sylvestris L)-dominated stands established on dryish mineral soil sites. In half of the sample plots the stand structure was all-sized (ie stem distribution resembled an inverted letter J). Even-sized stand structure (stem distribution resembled a normal distribution) applied in the case of 31% of sample plots while 17% were irregularly uneven-sized in structure. The number of trees per hectare in the all-sized stands was more than twice that of evensized stands. The mean annual increment increased along with an increase in growing stock volume. The volume in even-sized stands was higher than in all-sized stands but their mean annual increment was equal. Nevertheless, in stands with equal average volume (125 ± 25 mthe mean annual increment in all-sized stands was one third higher than in even-sized stands.

[1]  Hakkauksilla käsiteltyjen männiköiden rakenteesta ja kehityksestä. , 1954 .

[2]  T. Saksa,et al.  Structure and yield of all-sized and even-sized conifer-dominated stands on fertile sites , 1994 .

[3]  M. Lappi-Seppälä.  Untersuchungen über die Entwicklung gleichaltriger Mischbestände aus Kiefer und Birke : basiert auf Material aus der südhäfte von Suomi (Finnland) = Tutkimuksia tasaikäisen mänty-koivusekametsikön kehityksestä : Suomen eteläpuoliskosta kootun aineiston perusteella : suomenkielinen selostus , 2022 .

[4]  Kari Mielikäinen.  Mänty koivusekametsiköiden rakenne ja kehitys. , 1980 .

[5]  B. Jonsson.  Om barrblandskogens volymproduktion , 1962 .

[6]  Erik Lönnroth.  Untersuchungen über die innere Struktur und Entwicklung gleichaltriger naturnormaler Kiefernbestände : basiert auf Material aus der Südhälfte Finnlands. , 1925 .

[7]  R. Leemans,et al.  Pattern and process and the dynamics of forest structure: a simulation approach. , 1990 .

[8]  T. Saksa,et al.  The Structure of Advanced Virgin Forests in Finland , 1991 .

[9]  R. Reynolds.  Twenty-nine years of selection timber management on the Crossett Experimental Forest. , 1969 .

[10]  Hans Gustav Gustavsen,et al.  Luonnontilaisten soiden puustot kasvullisella metsämaalla 1950-luvun alussa. , 1986 .

[11]  J. Laine,et al.  Suopuustojen rakenteen kehitys ojituksen jälkeen. , 1988 .

[12]  John A. Helms,et al.  Principles of Silviculture , 1979 .

[13]  A. Cajander,et al.  Forest types and their significance. , 1949 .