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Rosenqvist, Johan (2003) Hägn i skogsbruket. Other thesis, SLU.

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This survey was made during the autumn of 2002 and the beginning of 2003, on commission from the National Board of Forestry. The purpose with the survey was to gather experience and knowledge in the organisation about fencing and this was made through interviews. The ambition was also to get knowledge from people outside the organisation that have great experience of forestry and fencing. The interviews were based on questions that have been composed by the author with help from the supervisors. The questions were the same to both the personal from the National Board of Forestry and to the foresters. Interviews were also made with private landowners, gamekeepers, game researcher, the County Administrative Board, the National Road Administration, pole and net retailers and contractors. The target group for this work is the National Board of Forestry to be forwarded to persons interested in forestry with the ambition to spread knowledge about how to prevent damage on the forest by browsing animals. The deer populations are big in the south of Sweden and growing populations have increased the damage on plantations of broadleaves of the most species. The consequence is that the amount of plantations of broadleaves and pine are decreasing in favour of spruce. Lots of different chemicals are used on plants and they have a deterrent effect against browsers. This treatment has to be done every year and it is only efficient on conifers. To have a more permanent protection for the broadleaves against browsing from deer, fencing seems to be the most reliable alternative. The most common fence construction used in forestry is a net with smaller size on the mesh close to the ground. This net is attached to turned impregnated poles. Made in a correct way it is a reliable construction, but some improvements can make the fence more efficient and decrease the damage on the fence. One alternative is the "Hedafence", and it is made of two different nets, which are joint together. This net is hanging on poles, which is made as a cross and does not have to be anchored in the ground. Electric fence is another alternative and it is a construction with low establishment cost. The disadvantages are the dependence of electricity. Fence is exposed to damage caused by animals. Some of the damage could decrease if the fence is made more visible. When wild boars pass the fence they leave holes that other animals can use. This is a problem, which probably will get more common because of the growing population. Trees, which fall over the fence, vegetation and the public, could also cause damage on the fence. To make the fence efficient it is important that the net is high enough, preferably two meters, and well visible. Every fenced area should have passage for the public and a frequent maintenance of the fence.

Item Type: Thesis (Other)
Keywords: fencing, browsing animals, damage on forest, deer
Subject (faculty): Faculty of Forest Sciences > Southern Swedish Forest Research Centre
Divisions: SLU > Faculty of Forest Sciences
Depositing User: Desiree Johansson
Date Deposited: 01 Dec 2006
Last Modified: 18 Aug 2015 09:45
URI: http://ex-epsilon.slu.se/id/eprint/1318

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