Leena Hytönen , Jukka Aarnio

Kunnostusojituksen erilliskannattavuus muutamilla karuhkoilla rämeillä

Hytönen L., Aarnio J. Kunnostusojituksen erilliskannattavuus muutamilla karuhkoilla rämeillä.

Tiivistelmä

The paper presents the results of a study to assess the profitability of ditch-network maintenance on some oligotrophic pine mires. The alternative ditch-network maintenance methods compared were: ditch cleaning, complementary ditching, and ditch cleaning and complementrary ditching combined. Nine drained pine-dominated mires were chosen for investigation. Only the ditch-network maintenance costs were included in the calculations. Profitability was calculated for two cases: 1) the forest owner pays all the costs and 2) he obtains the maximum state grant. Without the state grant ditch-network maintenance provided a net present value of 870 FIM ha-1 with a 3 % rate of interest, of 220 FIM ha-1 with the 5 % rate of interest, and on internal rate of return of 5 %. With the state grant the results were: 1620 FIM ha-1, 970 FIM ha-1 and 10%, respectively. The conclusions were that in most cases ditch-network maintenance is profitable even without state grant. By using 3 % and 5 % interest rates, the complementary ditching and combination provided similar profitability, specially when the state grants were provided. Using the IRR criterion, the complementary ditching provided the best profit.

Avainsanat
forest drainage; Scots pine; internal rate of return; net present value

Vastaanotettu 31.10.2017 Julkaistu 1.1.1998

Katselukerrat 482

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