Zum Wachstum und zur Produktivität des Wasserverbrauches der Baumarten Acer platanoides L., Acer pseudoplatanus L. und Fraxinus excelsior L.

Abstract

Summary Amount of basal increment, growth and volume increment of stem, number, area and volume of leaves, water consumption (absolute and per m 2 leaf area), and water economy during a vegetation period were studied in Acer platanoides L., Acer pseudoplatanus L. and Fraxinus excelsior L. Volume increment (stem and leaves) is higher with Fraxinus than Acer , and higher with Acer platanoides L. than with Acer pseudoplatanus . Fraxinus consumes pro unit leaf area more water (1 water/m 2 ) than Acer ; and Acer platanoides L. less than Acer pseudoplatanus L. Acer platanoides L. is therefore more economic than Fraxinus excelsior L. and Acer pseudoplatanus L. In comparison to Alnus glutinosa (L.) Gaertn ., Salix alba L. «mpde« (s. Braun , 1974 a), Acer platanoides L., Acer pseudoplatanus L. and Fraxinus excelsior L. the water economy of Salix is low, of Fraxinus, Alnus and Acer pseudoplatanus L. moderate and of platanoides L. high. These results correspond to ecological conditions of the natural environment of these tree-species.