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Dinitrogen fixation by a mature Ceanothus velutinus (Dougl.) stand in the Western Oregon Cascades



Dinitrogen fixation by a mature Ceanothus velutinus (Dougl.) stand in the Western Oregon Cascades



Canadian Journal of Microbiology 29(8): 1014-1021



Snowbrush (Ceanothus velutinus var. velutinus), in a 17-year-old stand in the Western Oregon Cascade Mountains, had a total estimated biomass of 42 680 kg ha-1, including 750 kg ha-1 of nodule biomass. Snowbrush fixed N2 for approximately 240 days annually. Except during precipitation or periods of low xylem pressure potentials, C2H2 reduction rates in the summer and autumn were significantly correlated with soil temperatures. Diurnal variation in nitrogenase activity was measured.

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Accession: 001336754

Download citation: RISBibTeXText

DOI: 10.1139/m83-159



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