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

Yrjö Ilvessalo (email)

Luonnonnormaalien metsiköiden kehityksestä Pohjanmaan kivennäismailla

Ilvessalo Y. (1969). Luonnonnormaalien metsiköiden kehityksestä Pohjanmaan kivennäismailla. Acta Forestalia Fennica no. 96 article id 7605. https://doi.org/10.14214/aff.7605

English title: The development of natural normal forest stands on mineral soils in Ostrobothnia in Finland

Abstract

The article is third part of a series of papers on fully stocked natural normal stands on mineral soils in Finland. This part studies area between the ca. 62nd and 66nd parallels of the strip of land on the Gulf of Bothnia stretching from the coast to an altitude of 150 m above the sea level. The material consists of 121 sample plots in Scots pine (Pinus sylvestris L.) stands, 36 sample plots in Norway spruce (Picea abies (L.) H. Karst.) and 22 sample plots in birch (Betula sp.) stands.

Since the vegetation gradually changes from south to north, it was considered necessary to separate sub-types (marked s.) for certain southern-central forest types; these are poorer in vegetation but obviously more generally found than the main types. The Myrtillus s. sub-type shows slower development of pine stands than the Myrtillus type. The number of stems on the former is greater, owing to the slow initial development, but the mean diameter and height are smaller than on the latter. The difference in volume and growth increases with age. The slower the rate of self-thinning on the sub-type has the effect that the differences in total production are small.

The Vaccinium sub-type s. (VTs.) is poorer in vegetation than the southern-central type, differs from VT less than was the difference in the MT sub-types. The Empetrum-Vaccinium type (EVT) in general differs considerably from the VT but less from the VTs., in relation to which the difference shows mainly in the volume and total production. The EVT differs from the Calluna type as regards in all stand characteristics.

The results of this study suggest that the s.c. sub-type MT could be placed between the types MT and VT. This has significance especially in forest mensuration. However, in practical forest inventories it would seem possible to combine MT and MTs. to avoid having too many site classes. The types VT and VTs. can generally be considered nearly as one type. Similarly, CT and ECT (Empetrum-Calluna type) may be regarded as one site group. The differences may also partly be due to differences in early treatment of the forests.

The PDF includes a summary in English.

Original keywords
metsätyypit; Pohjanmaa; luonnonnormaalit metsät

English keywords
Finland; growth; forest types; Ostrobothnia; natural normal forests

Published in 1969

Views 1828

Available at https://doi.org/10.14214/aff.7605 | 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
Ilvessalo Y., (1969) Earlier and present forestry research in Finland Silva Fennica vol. 3 no. 2 article id 4789
Ilvessalo M., Ilvessalo Y. (1966) Development of small forest holdings between 193.. Silva Fennica vol. no. 119 article id 4733
Ilvessalo Y., (1939) Assessment of forest growth Silva Fennica vol. no. 52 article id 4551
Ilvessalo Y., (1937) Principles of forest taxation Silva Fennica vol. no. 42 article id 4515
Ilvessalo Y., (1937) Practical forest inventory methods Silva Fennica vol. no. 39 article id 4480
Ilvessalo Y., (1927) Methods for preparing yield tables Silva Fennica vol. no. 5 article id 4446
Ilvessalo Y., (1927) Preparation of growth and yield tables Silva Fennica vol. no. 4 article id 4441
Ilvessalo Y., (1927) The inventory of forest resources Silva Fennica vol. no. 4 article id 4440
Ilvessalo Y., (1967) The development of natural normal forest stands .. Acta Forestalia Fennica vol. 81 no. 5 article id 7170
Ilvessalo Y., (1954) Nationwide surveys of forest resources and wood .. Acta Forestalia Fennica vol. 61 no. 21 article id 7433
Ilvessalo Y., (1949) Aimo Kaarlo Cajander : in memoriam Acta Forestalia Fennica vol. 56 no. 2 article id 7393
Ilvessalo Y., (1949) Aimo Kaarlo Cajander : in memoriam Acta Forestalia Fennica vol. 56 no. 1 article id 7392
Ilvessalo Y., (1934) The mutual relation between the occurrence of fo.. Acta Forestalia Fennica vol. 40 no. 11 article id 7288
Ilvessalo Y., (1929) Notes on some forest (site) types in North America Acta Forestalia Fennica vol. 34 no. 39 article id 7252
Ilvessalo Y., (1923) Studies on the condition of private forests in t.. Acta Forestalia Fennica vol. 26 no. 2 article id 7090
Ilvessalo Y., (1923) Paper on the correlation between the characteris.. Acta Forestalia Fennica vol. 25 no. 10 article id 7085
Ilvessalo Y., (1922) Statistical studies on the vegetation in differe.. Acta Forestalia Fennica vol. 20 no. 3 article id 7063
Cajander A. K., Ilvessalo Y. (1921) About the forest types II Acta Forestalia Fennica vol. 20 no. 1 article id 7061
Ilvessalo Y., (1920) Growth and yield tables for the Scots pine, Norw.. Acta Forestalia Fennica vol. 15 no. 4 article id 7042
Ilvessalo Y., (1920) Studies on mensurational significance of forest .. Acta Forestalia Fennica vol. 15 no. 3 article id 7041
Ilvessalo Y., (1920) The relation of the productive capacity of fores.. Acta Forestalia Fennica vol. 15 no. 2 article id 7040
Ilvessalo Y., (1916) The growth of the dominant trees in Scots pine f.. Acta Forestalia Fennica vol. 6 no. 1 article id 7012
Ilvessalo Y., Ilvessalo M. (1975) The forest types of Finland in the light of natu.. Acta Forestalia Fennica vol. 0 no. 144 article id 7578
Ilvessalo Y., (1970) Natural development and yield capacity of forest.. Acta Forestalia Fennica vol. 0 no. 108 article id 7542
Ilvessalo Y., (1969) The development of natural normal forest stands .. Acta Forestalia Fennica vol. 0 no. 96 article id 7605