Effect of species composition on economic return in a mixed stand of Norway spruce and Scots pine
| Autor: | Jouni Vettenranta |
|---|---|
| Přispěvatelé: | The Finnish Society of Forest Science, Suomen metsätieteellinen seura, Finlands Forstvetenskapliga Samfund |
| Rok vydání: | 1996 |
| Předmět: |
sekametsät
010504 meteorology & atmospheric sciences growth kannattavuus 01 natural sciences models lcsh:Forestry silvicultural systems kasvumallit 0105 earth and related environmental sciences metsänkäsittelytavat 040101 forestry taloudellinen arviointi biology Picea abies Agroforestry Ecological Modeling fungi Economic return mixed forests Scots pine Pinus sylvestris Forestry 04 agricultural and veterinary sciences 15. Life on land biology.organism_classification lcsh:SD1-669.5 0401 agriculture forestry and fisheries Environmental science Composition (visual arts) puulajikoostumus valuation |
| Zdroj: | Silva Fennica, Vol 30, Iss 1 (1996) |
| ISSN: | 2242-4075 |
| DOI: | 10.14214/sf.a9219 |
| Popis: | The effect of species mixture was studied in a mixed stand of Norway spruce ( (L.) H. Karst.) and Scots pine ( L.) by simulating around 100 different treatment schedules during the rotation in a naturally regenerated even-aged stand located on a site of medium fertility in North Karelia, Finland. Both thinning from below and thinning from above were applied. Optimum rotations were determined by maximising the net present value calculated to infinity and different treatment schedules were compared with the net present value over one rotation as per rotation applied. In the optimum treatment programme, the proportion of pines was decreased by half of the basal area in the first thinning stage and by the end of the rotation to about one third. In thinning from above, the proportion of pines can be maintained at a slightly higher level. It is economically profitable to maintain the growing stock capital at approximately the level recommended by Forest Centre Tapio, a semi-governmental forestry authority. With non-optimum species composition, the loss in net present value over one rotation can be about 10 % in thinning from below and about 20 % in thinning from above. Picea abiesPinus sylvestris |
| Databáze: | OpenAIRE |
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