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Research article2006Peer reviewed

Discrimination against N-15 in three N-2-fixing Trifolium species as influenced by Rhizobium strain and plant age

Carlsson G, Palmborg C, Huss-Danell K

Abstract

When estimating N-2 fixation with the N-15 natural abundance method, the N-15 abundance in plants grown with N-2 in air as only N source ( B), must be known in order to account for discrimination against N-15 during N-2 fixation. Trifolium hybridum L., T. pratense L. and T. repens L. were grown without N in the nutrient solution in a greenhouse. The aim was to establish B values in these species in symbioses with Scandinavian Rhizobium genotypes, and to test the hypothesis that B is related to N-2 fixation efficiency and plant age. Choice of Rhizobium strain significantly influenced B in shoots of T. hybridum and T. repens, and N content in all Trifolium species. B in shoots was partly correlated to amounts of N-2 fixed, while plant age only had a marginal effect. Soil suspension inoculum or single strain inocula gave very similar B in shoots of T. pratense

Published in

Acta Agriculturae Scandinavica, Section B - Soil and Plant Science
2006, Volume: 56, number: 1, pages: 31-38
Publisher: TAYLOR & FRANCIS AS

      SLU Authors

    • Carlsson, Georg

      • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences

      • Palmborg, Cecilia

        • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences

        • Huss-Danell, Kerstin

          • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences

        UKÄ Subject classification

        Food Science
        Agricultural Science
        Environmental Sciences related to Agriculture and Land-use

        Publication identifier

        DOI: https://doi.org/10.1080/0906471051003131

        Permanent link to this page (URI)

        https://res.slu.se/id/publ/8183