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Investigations were conducted on the chemical composition and the content of heavy metals in Salix caprea trees derived from the Zielonka Primeval Forest near Poznań. The content of cellulose, lignin and pentosans was similar to that found in literature and the quantities of heavy metals determined in individual parts of trees were similar to those found in trees growing in unpolluted areas.
The paper presents the chemical composition and the heat of combustion of selected willow bushes. Experiments were carried out on one-year old shoots of the following willow species and their crosses: Salix americana, Salix viminalis, Salix americana x Salix viminalis, Salix viminalis x Salix caprea, Salix viminalis x Salix acutifolia as well as on shoots of Orm Valne - Swedish variety.
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