Vergleichende Ökobilanzierung der Rundholzproduktion in verschiedenen Forstbetrieben

Hamburg

2001

140 S.

14 Lit. Ang.

Bandaufführung

76218

The production of roundwood is the first link in a chain of various product lines which are based on wood as a raw material and energy source. Therefore the Life Cycle Assessment (LCA) of roundwood production is necessary as a data source for LCAs of wood and paper products. In order to verify LCA results of roundwood production that are based on average data, and to proof whether different forest management systems are assessable, the biological and technical production of roundwood in seven forest enterprises has been assessed. The total fossil energy input of roundwood production related to the functional unit "tons absolute dry wood" differs between 170 and 270 MJ/t. In all enterprises the major energy input is necessary for logging operations. Also liming by helicopter and the administration consumes remarkable amounts of fossil energy. From a LCA point of view these parts of roundwood production cause the strongest environmental impacts. With means of LCA a predominant influence of the different management systems could not be found. The Life Cycle Inventory (LCI) did show that the highest energy and material flows are caused by logging operations. Their amount depends mainly on the mass-size ratio of the harvested wood and the logging technique. For this most important part of roundwood production the forest management system is of minor importance; with exception of stand establishment this is also true for the other parts of roundwood production. Due to the importance of logging operations it seems to be more effectice to focus on a more detailed assessment of roundwood assortments than on forest management systems.