Kristina Palmgren 
,
Anna Saarsalmi,
Assi Weber
Nitrogen fixation and biomass production in some alder clones.
Palmgren K., Saarsalmi A., Weber A. (1985). Nitrogen fixation and biomass production in some alder clones. Silva Fennica vol. 19 no. 4 article id 5254. https://doi.org/10.14214/sf.a15433
Abstract
In a greenhouse experiment that lasted for two years, nitrogenase activity, height growth and biomass production was compared in six clones of alder of which four were clones of Alnus incana and two A. incana x A. glutinos hybrids. In addition, the effect of a fertilizer nitrogen gradient was tested on one of the clones.
Clonal differences in height growth and nitrogenase activity were recorded at the end of the first growing season. The growth rhythm of some of the clones changed markedly during the second growing season but differences in nitrogenase activity between clones levelled out. Nitrogen fertilization suppressed nodulation during the first growing season, and also the following year the nitrogenase activity was significantly higher in alders grown without nitrogen supplement. Height growth and total biomass production was also depressed at rather low nitrogen levels.
The PDF includes a summary in Finnish.
Keywords
biomass;
height growth;
Alnus incana;
clones;
nitrogen fertilization;
Alnus glutinosa x incana;
nitrogenase activity;
nodulation
Published in 1985
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