Skogstillväxten ca 20 år efter plantering på Flakmossen
dikningens och gödslingens betydelse vid beskogning på en avslutad torvtäkt i Värmland
AfforestationPlantingScots pineAbandoned peat fieldSpot fertilizationPK-fertilizerDrainage intensity
This study was performed in an afforestation experiment established 1982 on an abandoned peat harvesting area, Flakmossen, in the province of Värmland, SW Sweden. The experimen-tal design include planting with Scots pine (Pinus sylvestris), in combination with various drainage intensities (20, 30, and 40 m between ditches), and fertilizer doses 0, 100, and 200 g PK per seedling applied at the date of planting.
The aim of this study was to achieve more knowledge about the conditions on afforestation of peat harvesting areas, especially regarding drainage intensity and fertilization requirements, by means of determining the stand growth and yield in the Flakmossen trial.
The forest growth did not differ significantly between the drainage intensities tested when the same amount of phosphor and potassium fertilizer was added. Thus, shorter distances between ditches than 40 m can not be recommended.
When no fertilization was carried out seedling survival was very low, and the growth of sur-vived seedlings was poor. The largest diameter and height growth were observed in the areas where the highest dose of phosphorus and potassium (200g/seedling) was given. The results indicate that the average site growth capacity during a rotation period is 7-8 m3ha -1yr-1 . This is about 40 % higher than the average for all forest land in the province.
The results indicate that afforestation of peat harvesting areas should be considered as effec-tive land use.