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

Matti Keltikangas (email), Jukka Laine, Pasi Puttonen, Kustaa Seppälä

Vuosina 1930-1978 metsäojitetut suot: ojitusalueiden inventoinnin tuloksia

Keltikangas M., Laine J., Puttonen P., Seppälä K. (1986). Vuosina 1930-1978 metsäojitetut suot: ojitusalueiden inventoinnin tuloksia. Acta Forestalia Fennica no. 193 article id 7639. https://doi.org/10.14214/aff.7639

English title: Peatlands drained for forestry during 1930–1978: results from field surveys of drained areas

Abstract

An extensive field-based survey was conducted to establish the distribution of site types on drained peatlands, the condition of the drainage networks, the post-drainage development of the tree stands, their structure and silvicultural condition and the corresponding requirements for operational measures. The data is based on sampling of the forest drainage undertaking during 1930–78 and consists of 1,312 km inventory transect, 6,030 relascope sample plots and 21,700 studied ditches.

Of the studied peatlands more than 60% were Scots pine (Pinus sylvestris L.) mires, slightly under 20% Norway spruce (Picea abies) mires, and under 10% each treeless mires and paludified upland forest sites. The remaining peatland area that is to be considered suitable for forest drainage according to criteria used by Heikurainen (1960) now consists mainly of spruce mires and paludified upland forest types; about 1 million ha both groups still remain undrained.

The proportion of ditches in need of ditch cleaning was estimated to be under 10% in the youngest drained areas and under 30% in the oldest. The mean tree stand volumes of the drained peatlands of different site types show the same dependence on the trophic level as in earlier studies but the volumes seem to be some 5–10% lower. These results compare favourably with those of the 7th national forest inventory.

Trends in the post-drainage development of tree stand volumes and increment are also, generally, in accordance with earlier findings but have somewhat lower values. The development of the nutrient-poor site type stands, especially in Northern Finland, seems to be significantly poorer than was earlier assumed.

The PDF includes a summary in English.

Original keywords
suotyypit; ojitetut suot; inventointi; kuivatusteho; ojaverkosto; metsänhoidollinen tila

English keywords
inventory; forest drainage; drainage effect; site type distribution; silvicultural condition; ditch network

Published in 1986

Views 6137

Available at https://doi.org/10.14214/aff.7639 | 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
Send to email
Andersson J., Eliasson L. (2004) Effects of three harvesting work methods on Harw.. Silva Fennica vol. 38 no. 2 article id 428 (remove) | Edit comment
Finnish Society of Forest Science ., (1968) Forest scientific research published in Finland .. Silva Fennica vol. 2 no. 1 article id 4763 (remove) | Edit comment
Viherä-Aarnio A., Saarsalmi A. (1994) Growth and nutrition of willow clones. Silva Fennica vol. 28 no. 3 article id 5531 (remove) | Edit comment
Raatikainen M., Raatikainen T. (1983) The berry yield, picking and marketing of Vaccin.. Silva Fennica vol. 17 no. 2 article id 5180 (remove) | Edit comment
Heräjärvi H., (2001) Technical properties of mature birch (Betula pen.. Silva Fennica vol. 35 no. 4 article id 581 (remove) | Edit comment
Humplík P., Čermák P. et al. (2016) Electrical impedance tomography for decay diagno.. Silva Fennica vol. 50 no. 1 article id 1341 (remove) | Edit comment
Hagman Max., (1967) Book review: Breeding Pest-Resistant Trees Silva Fennica vol. 1 no. 2 article id 4749 (remove) | Edit comment
Simons T., (1979) The role of architects and foresters in shaping .. Silva Fennica vol. 13 no. 2 article id 5031 (remove) | Edit comment
Keltikangas M., Laine J. et al. (1986) Peatlands drained for forestry during 1930–1978:.. Acta Forestalia Fennica vol. 0 no. 193 article id 7639 (remove) | Edit comment
Your search results