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Silva Fennica 1926-1997
1990-1997
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Acta Forestalia Fennica
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Silva Fennica 1926-1997 vol. 24 no. 4 | 1990

Category: Article

article id 5435, category Article
Matti Leikola. (1990). Metsien ja metsätalouden kehitys laajoissa ympyröissä. Silva Fennica vol. 24 no. 4 article id 5435. https://doi.org/10.14214/sf.a15589
English title: Book review: Development of forests and forestry.
Keywords: book review

This article is a book review on a book ‘The problems of Forest-based Development as Illustrated by the Development Discussion’ by Jussi Raumolin, concentrating on the development of forestry.

  • Leikola, ORCID ID:E-mail:
article id 5434, category Article
Risto Heikkilä. (1990). Männyntaimikon ominaisuuksien vaikutus hirvituhoalttiuteen. Silva Fennica vol. 24 no. 4 article id 5434. https://doi.org/10.14214/sf.a15588
English title: Effect of plantation characteristics on moose browsing on Scots pine.

The effects of plantation characteristics on moose (Alces alces) browsing intensity was studied in 82 Scots pine (Pinus sylvestris L.) plantations in Southern Finland. Moose browsing occurred most commonly in plantations established on relatively fertile soil, and the degree of damage was at highest in plantations with openings. A high amount of brush, especially aspen, increased the risk of damage. Furthermore, damage was intensified in plantations situated on hills, slopes or at a long distance from main roads or settlements.

The PDF includes an abstract in Finnish.

  • Heikkilä, ORCID ID:E-mail:
article id 5433, category Article
Marja-Leena Valkonen, Heikki Hänninen, Paavo Pelkonen, Tapani Repo. (1990). Männyn taimien pakkaskestävyys lepovaiheen aikana. Silva Fennica vol. 24 no. 4 article id 5433. https://doi.org/10.14214/sf.a15587
English title: Frost hardiness of Scots pine seedlings during dormancy.

The relationships between bud dormancy and frost hardiness were examined using two-year-old Pinus sylvestris L. seedlings. The chilling temperatures used were +4 and -2°C. To examine the dormancy release of the seedlings, a forcing technique was used. Frost hardiness was determined by artificial freezing treatments and measurements of electrical impedance. At the start of the experiment, the frost hardiness of the seedlings was about -25°C. After the rest break, the seedlings kept at +4°C dehardened until after eight weeks their frost hardiness reached -5°C. At the lower chilling temperature (-2°C) the frost hardiness remained at the original level. When moved from +4 to -2°C, seedlings were able to reharden only after the time required for bud burst in the forcing conditions had reached the minimum.

The PDF includes an abstract in Finnish

  • Valkonen, ORCID ID:E-mail:
  • Hänninen, ORCID ID:E-mail:
  • Pelkonen, ORCID ID:E-mail:
  • Repo, ORCID ID:E-mail:
article id 5432, category Article
Risto Rikala, Helen J. Jozefek. (1990). Dolomiittikalkin ja puun tuhkan vaikutus kasvuturpeeseen ja taimien kehittymiseen. Silva Fennica vol. 24 no. 4 article id 5432. https://doi.org/10.14214/sf.a15586
English title: Effect of dolomite lime and wood ash on peat substrate and development of tree seedlings.

Effect of dolomite lime and wood ash (0, 0.5, 1, 2, 4, 8 and 16 kg m-3) on the chemical composition of low humified Sphagnum peat was studied. Germination of Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) H. Karst.) and silver birch (Betula pendula Roth) and the subsequent growth of these seedlings were investigated in a greenhouse experiment. Nutrient concentrations in shoots and roots of pine seedlings were also analysed. The pH of peat increased asymptotically from 3.8 to about 7.0 with increasing lime regimen and to about 8.0 with increasing ash regimen. Wood ash linearly increased electrical conductivity and P, K, and Ca concentrations of peat. Rate of germination, within 7 days, of pine and spruce was best at low pH (<5) while birch seeds had a slightly higher pH optimum (4–6). Germination capacity, within 21 days, was not affected by pH or application regimen of either lime or ash. Pine and spruce seedlings grew best with lime and ash doses of 0.5–2.0 kg m-3, the pH of peat being 4–5. Lime and ash treatments did not affect the growth of birch seedlings, but wood ash increased nutrient concentration of pine seedlings.

The PDF includes an abstract in Finnish.

  • Rikala, ORCID ID:E-mail:
  • Jozefek, ORCID ID:E-mail:

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