Hur påverkas markberedningsresultatet vid harvning och högläggning av faktorer som lutning, ytstruktur och markfuktighet?
2015
Wikner, Frida
Soil scarification means lot to the regeneration of the forest because a good soil scarification boost the increment of the plants and it also makes the plants less attractive to dangerous insects. The surveys purpose was to investigate how different site factors influence the soil scarifications results. The goal was to see if any scarification method was better adapted to a certain site then the other. In order to see a result the survey investigated the bearing capacity of the stands, the surface structure and the slope of the terrain. The surveys material has been collected during august - October 2013 on SCA: s forest in Ångermanland in Sweden. Totally has 65 harrowed sites and 35 scalped sites been visited and material collected from. The survey result shows that the scarification quality after scalping was higher than after harrowed sites. The number of 5: s and 4: s was more frequent after scalping but the number of mineral 3: s was higher after harrowing. The analysis of the results shows that scalping was more sensitive to the site slope and surface structure then harrowed sites, but when used on the the right ground it will provide a better quality result. The conclusion of the survey was that harrowing is the better choice of the scarification methods because it showed a more stable result then scalping that is more depending on the terrain conditions. Harrowing should not be used on moist ground due to the risk of Hylobius abietis attacking the plants. Scalping on the other hand showed a better result of the scarification quality and on the right ground it is the optimal choice.
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