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Suo - Mires and peat vol. 44 no. 2 | 1993

Hedwig Roderfeld. Kohosoiden luonnontilaan palauttaminen turpeen noston jälkeen Luoteis-Saksassa.

English title: Raised bog regeneration after peat harvesting in North-West Germany.

Keywords: peatlands; nature protection; rehabilitation; top spit

Abstract | View details | Full text in PDF | Author Info

An increasing awareness of the environment and the wide extension of mined peatlands require actions and measurements in order to ensure their regeneration and protection. A brief description of the most important peat harvesting methods in North-West Germany shows the stratigraphy of peatlands after exploitation has been finished and ecotechnological actions have been started to initiate a raised bog regeneration. The actions and measurements applied depend also on the properties of the peat as on the properties of the top spit layer. The requirements for a successful rewetting of peatlands will be shown. The terminology concerning the subject of raised bog regeneration will be explained. Keywords: nature protection, peatlands, rehabilitation, top spit

Roderfeld, Institute of Soil Technology Bremen, Geological Survey of Lower-Saxony, Friedrich-Mifller-Str. 46/50, D-2800 Bremen, Germany E-mail: ei.tietoa@nn.oo

Paula Isoaho, Risto Lauhanen, Markku Saarinen. Metsäojien jatkuvan kunnossapidon vaikutus ojitusalueiden tilaan Keski-Pohjanmaalla.

English title: Effects of continuous ditch network maintenance on the condition of forest drainage areas in Central Ostrobothnia district.

Keywords: forest drainage; Alternative excavating methods; ditch maintenance; stand volume

Abstract | View details | Full text in PDF | Author Info

The estimated annual need for ditch network maintenance in Finnish peatland forests is over 100 000 hectares, most of it consisting of ditch cleaning. However, there are not enough funds available for the needs of remedial ditching. In addition, environmental aspects in peatland forestry must be considered more than in the past. Thus, it is necessary to evaluate alternative work methods of ditch network maintenance. This paper presents the effects of continuous ditch network maintenance on the dimensions and the condition of ditches, as well as on the development of the tree stands on ditched sites. Key words: Alternative excavating methods, ditch maintenance, forest drainage, stand volume

Isoaho, The Finnish Forest Research Institute, Kannus Research Station, FIN-69100 Kannus, Finland E-mail: ei.tietoa@nn.oo
Lauhanen, E-mail: ei.tietoa@nn.oo
Saarinen, E-mail: ei.tietoa@nn.oo

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