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Silva Fennica 1926-1997
1990-1997
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Acta Forestalia Fennica
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1913-1932

Silva Fennica 1926-1997 vol. 13 no. 1 | 1979

Category: Article

article id 5021, category Article
Antti Koskimäki, Pertti Hari, Markku Kanninen, Seppo Kellomäki. (1979). Eräiden lehtikuusilajien kasvurytmin muuntuminen kasvihuoneolosuhteissa. Silva Fennica vol. 13 no. 1 article id 5021. https://doi.org/10.14214/sf.a14875
English title: Inherent growth rythm of some Larix-species grown in a plastic greenhouse.

The daily height growth rate of several larch species and progenies (Larix decidua, Larix sibirica, Larix laricina, Larix leptolepis) grown in a plastic greenhouse and in the open was measured. The growth pattern indoors was completely different compared with the normal outdoor growth pattern. The onset of growth took place in the greenhouse much earlier than outdoors and the phase of increasing growth was much shorter, as was expected. However, the phase of maximum growth was unexpectedly long. This fact suggests that there is great potential for using greenhouse cultivation to change the growth pattern of cultivated plants in order to obtain more complete utilization of the potential growing season.

The PDF includes a summary in Finnish.

  • Koskimäki, ORCID ID:E-mail:
  • Hari, ORCID ID:E-mail:
  • Kanninen, ORCID ID:E-mail:
  • Kellomäki, ORCID ID:E-mail:
article id 5020, category Article
Olli Saastamoinen. (1979). Valaistun hiihtoreitin käytön ajallinen vaihtelu. Silva Fennica vol. 13 no. 1 article id 5020. https://doi.org/10.14214/sf.a14874
English title: Time patterns in the use of an urban skiing route.

Temporal variations in use of an illuminated skiing route located near a town was examined. Three time-patterns (monthly, daily, hourly) were determined on the basis of empirical data. Preliminary data about the participation rates on Sundays of population living near the route was given. More than four thousand people reside within 0.5 km of the route. It can be supposed that on the best Sunday about 18% of the population participated in skiing. 

The PDF includes a summary in English.

  • Saastamoinen, ORCID ID:E-mail:
article id 5019, category Article
Pertti Hari, Markku Kanninen, Seppo Kellomäki, Olavi Luukkanen, Paavo Pelkonen, Raimo Salminen, Heikki Smolander. (1979). Metsikön kaasuaineenvaihdon ja ympäristötekijöiden automaattinen mittausjärjestelmä. Silva Fennica vol. 13 no. 1 article id 5019. https://doi.org/10.14214/sf.a14873
English title: An automatic system for measurements of gas exchange and environmental factors in a forest stand, with special reference to measuring principles.

A system for measuring the net photosynthesis, transpiration and environmental factors within the canopy and ground cover vegetation is described. The system operates continuously throughout the growing season in a young Scots pine (Pinus sylvestris L.) stand. A data-logging unit controls the system and carries out the measurements on the readings of the sensors of photosynthesis, transpiration, light intensity outside the canopy, light climate inside the assimilation chambers, and dry and wet temperatures from selected points. These measurements are shown digitally and automatically punched onto paper tape.

The PDF includes a summary in Finnish.

  • Hari, ORCID ID:E-mail:
  • Kanninen, ORCID ID:E-mail:
  • Kellomäki, ORCID ID:E-mail:
  • Luukkanen, ORCID ID:E-mail:
  • Pelkonen, ORCID ID:E-mail:
  • Salminen, ORCID ID:E-mail:
  • Smolander, ORCID ID:E-mail:
article id 5018, category Article
Pertti Laakso, Olli Saikku. (1979). Havaintoja karsituista männyistä sorvatun viilun laadusta. Silva Fennica vol. 13 no. 1 article id 5018. https://doi.org/10.14214/sf.a14872
English title: Observations on the quality of veneer from pruned Scots pine stems.
Original keywords: mänty; pystykarsinta; vaneri; laatu; viilu

The material was obtained from Scots pine (Pinus sylvestris L.) stems which were pruned 27 years earlier up to the height of 5–6 m. Rotary cutting was made from 16 pruned stems and 3 unpruned ones. The length of bolts was 70 cm and the thickness of veneer 1.5 mm. The proportion of good quality veneer was 46% in pruned stems and 14% in the others. Veneer with exellent quality was obtained from pruned stems up to the height of tree meters, that is to say a little under the pruning line.
The PDF includes a summary in English.

  • Laakso, ORCID ID:E-mail:
  • Saikku, ORCID ID:E-mail:
article id 5017, category Article
T. Raunemaa, A. Hautojärvi, P. Jartti, J. Laurén, V. Lindfors, J. Räisänen. (1979). Terveen ja lahon kuusen hivenaineanalyysejä röntgenfluoresenssi- ja neutroniaktivointimenetelmillä. Silva Fennica vol. 13 no. 1 article id 5017. https://doi.org/10.14214/sf.a14871
English title: Trace element analysis of sound and decayed Norway spruce (Picea abies) by XRF and NAA methods.

Ashed tree samples from sound and decayed Norway spruce (Picea abies (L.) H. Karst.) were studied by means of fast neutron activation analysis, and for comparison, also by X-ray fluorescence analysis. In fast neutron activation analysis, the following elements were detected: (Na), Mg, Al, Si, K, Ca, Mn, Rb, Sr and Ba, and according to the results of the X-ray fluorescence method the elements present in the wood samples were: K, Ca, Mn, Rb, Sr and Ba. A general diminishing was revealed by both methods in most elemental concentrations studied, with exception of K and Rb, when going from a sound tree to a decayed one. The use of the ratio of the amounts of potassium to calcium as an indication of the degree of decay is therefore proposed.

The PDF includes a summary in Finnish.

  • Raunemaa, ORCID ID:E-mail:
  • Hautojärvi, ORCID ID:E-mail:
  • Jartti, ORCID ID:E-mail:
  • Laurén, ORCID ID:E-mail:
  • Lindfors, ORCID ID:E-mail:
  • Räisänen, ORCID ID:E-mail:
article id 5016, category Article
H. Vasander, A. Mäkinen, P. Pakarinen. (1979). Kangaskorpimaannosten hivenainejakautumista ja -määristä. Silva Fennica vol. 13 no. 1 article id 5016. https://doi.org/10.14214/sf.a14870
English title: Trace elements in soil profiles of paludified spruce forests.

Gleysol profiles of five southern Finnish sites dominated by Norway spruce (Picea abies (L.) H. Karst.) were described according to the Canadian system of soil classification, and the total contents of five metals (Pb, Zn, Cu, Mn, Fe) were analysed in each soil profile. Lead, zinc and manganese showed highest concentrations in the organic surface horizons with a decrease towards mineral soil horizons. Vopper distribution was somewhat irregular. Iron had maximum values in the mineral soil: in A-horizon of Rego Gleysols and in B-horizon of Fera Gleysols. A preliminary comparison of metal pools in soil (root layer) with annual atmospheric input shows that the role of atmospheric deposition is relatively greater in the case of Cu, Zn and Pb than for Fe or Mn.

The PDF includes a summary in English.

  • Vasander, ORCID ID:E-mail:
  • Mäkinen, ORCID ID:E-mail:
  • Pakarinen, ORCID ID:E-mail:
article id 5015, category Article
Seppo Kellomäki. (1979). Ilmastotekijöiden vaikutus männyn puuaineen tiheyteen. Silva Fennica vol. 13 no. 1 article id 5015. https://doi.org/10.14214/sf.a14869
English title: On geoclimatic variation in basic density of Scots pine wood.

The effect of temperature and water supply in the basic density of Scots pine (Pinus sylvestris L.) wood was studied on the basis of material obtained from the literature. On a monthly basis, the basic density increased with increasing mean temperature for June, July and August. The rainfall in these months had no detectable effect on the basic density except through the difference between rainfall and evaporation in July. On a yearly basis, the basic density increased with increasing mean temperature, temperature sum and length of growth period. The effect of water supply on the basic density was evident, and a linear relationship between basic density and annual rainfall was detected. The variation in basic density was, however, explained only partly by the chosen factors. Possible reasons for the poor explanatory power have been discussed.

The PDF includes a summary in Finnish.

  • Kellomäki, ORCID ID:E-mail:
article id 5014, category Article
Matti Nuorteva. (1979). Punapuiden suojeluongelmia Kaliforniassa. Silva Fennica vol. 13 no. 1 article id 5014. https://doi.org/10.14214/sf.a14868
English title: Preservation problems of redwoods in California.

The paper deals with the problems of the preservation of the redwood groves (Sequioia sempervirens (D. Don) Endl. and Sequoiadendron giganteum (Lindl.) J. Buchholz) in California. The activity to protect these groves from flood and fire may finally lead to dying of these long-lived trees. A program to use prescribed burning as a tool for the management of natural ecosystem has been started.

The PDF includes a summary in English.

  • Nuorteva, ORCID ID:E-mail:

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