Productivity of willow coppice plants grown in short rotations
Szczukowski, S.(University of Warmia and Mazury, Olsztyn (Poland))E-mail:[email protected] | Stolarski, M. | Tworkowski, J. | Przyborowski, J. | Klasa, A.
Dry matter production and morphological features were studied in four fast growing willow genotypes harvested in one, two, three or four years cycles. The average yield was 16.79 t/ha/year. The highest yield was recorded for Salix viminalis x S. viminalis lanceolata (22.89 t/ha/year). The yield of S. triandra was three times lower than that of S. viminalis x S. viminalis lanceolata. The yield of S. viminalis x S. viminalis lanceolata, S. viminalis var. gigantea and S. viminalis var. regalis increased with increasing harvesting cycle. The opposite was found for S. triandra. This can indicate that S. triandra is not suitable for intensive growing on arable land, especially in two, three or four years harvest cycles. The tallest plants (769 cm) with the thickest stem (diameter of 37.43 mm) were S. viminalis x S. viminalis lanceolata harvested quadrennially. The average water conc. was 49.9%, the highest value was found in willows harvested annually.
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