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Silva Fennica 1926-1997
Acta Forestalia Fennica

Silva Fennica vol. 23 no. 3 | 1989

Category : Article

article id 5387, category Article
Olli Saastamoinen, Seppo Lohiniva. (1989). Picking of wild berries and edible mushrooms in the Rovaniemi region of Finnish Lapland. Silva Fennica vol. 23 no. 3 article id 5387.
Keywords: Vaccinium myrtillus; Vaccinium vitis-idaea; wild berries; commercial picking; mushrooms; berry picking; Rubus chamaemorus; picking for own use; edible fungi
Abstract | View details | Full text in PDF | Author Info

According to 459 and 350 questionnaires sent in 1983 and in 1985, respectively, the households in the Rovaniemi region located in the Arctic Circle in Northern Finland, eagerly picked wild berries. In both years, four out of five households picked at least one species of berry. In 1983 the total amount of wild berries picked was 29.2 kg per capita. In 1985 it was 15.0 kg per capita. Three species, the lingonberry (Vaccinium vitis-idaea L.), cloudberry (Rubus chamaemorus L.) and bilberry (Vaccinium myrtillus L.) made up 96% of all the wild berries picked during both years. Most of these berries were picked for the family’s own use, but many were also picked for sale. In 1983, 43% of all berries picked were sold, in 1985, 19% were sold. The cloudberry, although difficult to find, is the most important commercial species and also for household use it is the most sought after wild berry. Only very small amounts of edible mushrooms were collected, 1.0 kg per capita in 1983 and 1.3 kg in 1985.

The PDF includes an abstract in Finnish.

  • Saastamoinen, E-mail: os@mm.unknown (email)
  • Lohiniva, E-mail: sl@mm.unknown
article id 5386, category Article
Risto Päivinen, Hannu Yli-Kojola. (1989). Permanent sample plots in large-area forest inventory. Silva Fennica vol. 23 no. 3 article id 5386.
Keywords: forest inventory; sampling; permanent sample plots
Abstract | View details | Full text in PDF | Author Info

Theoretical and practical aspects of permanent sample plots are discussed in this paper. A study material of 6,871 permanent sample plots was generated using increment sample plots of the 7th National Forest Inventory of Finland. The effect of measurement errors and use of increment functions as ”a priori” information was studied via simulation experiments. The change in the growing stock volume between two consecutive measurement rounds was divided into the components drain, growth and mortality. Finally, a hypothetical inventory design using permanent sample plots was evaluated.

The PDF includes an abstract in Finnish.

  • Päivinen, E-mail: rp@mm.unknown (email)
  • Yli-Kojola, E-mail: hy@mm.unknown
article id 5385, category Article
Timo Kuuluvainen. (1989). Branching dynamics in young Scots pine. Silva Fennica vol. 23 no. 3 article id 5385.
Keywords: Pinus sylvestris; biomass production; branching; tree architecture; bifuraction; modular construction; shoot demography
Abstract | View details | Full text in PDF | Author Info

The development of shoot number and shoot properties was examined in successive shoot cohorts of young widely-spaced Scots pine trees (Pinus sylvestris L.) growing in a progeny trial. This was accomplished by reconstructing the branching process of the trees over a period of five years, from tree age 4 to 8. During this time the number of shoots in successive shoot cohorts increased rapidly, while at the same time the mean shoot length decreased. The decrease in shoot lengths from older to younger shoots was accompanied by a decline in the bifuraction frequency of the shoots. In general, rapid changes occurred in the branching characteristics during the yearly development of the trees. The variation in the branching characteristics was reflected in the development of the architecture and biomass production of the trees.

The PDF includes an abstract in Finnish.

  • Kuuluvainen, E-mail: tk@mm.unknown (email)
article id 5384, category Article
Raija-Liisa Petäistö. (1989). Syyskoulinnan ajankohdan vaikutus männyn taimien kuiva-ainepitoisuuteen, neulasten pitolujuuteen ja juurten uudistumiskykyyn. Silva Fennica vol. 23 no. 3 article id 5384.
English title: The influence of autumn transplanting date on the dry matter content, needle retention values and root regeneration of Scots pine (Pinus sylvestris) seedlings.
Original keywords: mänty; taimitarhat; koulinta; kuiva-ainepitoisuus; juurten kasvu
English keywords: Pinus sylvestris; root growth; nurseries; transplanting; dry matter content
Abstract | View details | Full text in PDF | Author Info

The experiment was performed in 1982–85 at the forest tree nursery in Suonenjoki, Central Finland. There were four to five transplanting dates ranging from the beginning of August to the end of September. The dry matter content, root regeneration and needle retention value of Scots pine (Pinus sylvestris L.) seedlings were examined. Development of the needle retention value in autumn was followed in nurseries at Suonenjoki, Rantasalmi, Mäntyharju and Taavetti in 1982.

Root regeneration was usually the worse, the later the seedlings were transplanted in the autumn. The dry matter content was generally lowest in the seedlings transplanted later in the autumn, and also to some extent in the seedlings transplanted at the beginning of August. The needle retention value increased as autumn advanced. Early transplanting in autumn had an adverse effect on the development of needle retention, and the values were highest in the seedlings transplanted later in the autumn.

The PDF includes an abstract English.

  • Petäistö, E-mail: rp@mm.unknown (email)
article id 5383, category Article
Pasi Miettinen, Aino Smolander. (1989). Growth requirements of Frankia strains isolated from Casuarina equisetifolia, and the influence of the isolates on the growth of the host plant. Silva Fennica vol. 23 no. 3 article id 5383.
Keywords: Casuarina; Frankia; growth response; nitrogen fixation; Kenya
Abstract | View details | Full text in PDF | Author Info

Frankia was isolated from the root nodules of Casuarina equisetifolia L. seedlings, grown in a growth chamber, after inoculation with soil originating from an old east Kenyan casuarina forest. Optimum pH for the growth of the two isolates ranged from 6.4 to 6.9. The optimum temperature for their growth was 32°C. The growth of these cultures ceased at NaCl concentration above 2%. The influence of the isolates on the growth of the host plant was determined in a growth chamber experiment in which an American Frankia strain (HFPCc13) was used as a reference. The biomass of the inoculated seedlings was 2.4–4.1 fold those of the non-inoculated control seedlings at the end of the 7-month experiment.

The PDF includes an abstract in Finnish.

  • Miettinen, E-mail: pm@mm.unknown (email)
  • Smolander, E-mail: as@mm.unknown
article id 5382, category Article
Seppo Kellomäki, Taneli Kolström, Hannu Väisänen, Esko Valtonen. (1989). Simulations on the occurrence of dead trees in natural pine stands. Silva Fennica vol. 23 no. 3 article id 5382.
Keywords: Pinus sylvestris; succession; time series; mortality
Abstract | View details | Full text in PDF | Author Info

The study aimed at recognizing the phases of forest succession where dead trees most probably occur. The model simulations showed that the increasing occurrence of dead trees culminated after the canopy closure. Thereafter the occurrence of dead trees decreased representing a pattern where high frequency of dead trees was followed by low frequency of dead trees, the intervals between the peaks in the number of dead trees being in Southern Finland about 15–30 years. Around this long-term variation there was a short-term variation, the interval between the peaks in the number of dead trees being 2–4 years. This pattern was associated with the exhausting and release of resources controlled by the growth and death of trees.

The PDF includes an abstract in Finnish.

  • Kellomäki, E-mail: sk@mm.unknown (email)
  • Kolström, E-mail: tk@mm.unknown
  • Väisänen, E-mail: hv@mm.unknown
  • Valtonen, E-mail: ev@mm.unknown

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