BIOLOGICAL NITROGEN FIXATION IN Casuarina equisetifolia USING NATURAL IN ISOTOPIC METHOD

J. SEMPAVALAN and P. SANTIIANAKRISHNAN

doi:https://doi.org/10.29321/MAJ.10.A00635

Madras Agricultural Journal

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BIOLOGICAL NITROGEN FIXATION IN Casuarina equisetifolia USING NATURAL IN ISOTOPIC METHOD

Author: J. SEMPAVALAN and P. SANTIIANAKRISHNAN,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 86, Issue: jul-sep,

DOI:https://doi.org/10.29321/MAJ.10.A00635

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Abstract

Casuarina equisetifolia seedlings, uninoculated or inoculated with Frankia strain Ce2 and Glomus fasciculatum were grown for 3 months in pots, harvested and N, fixation was measured using "N isotopic method. Maximum Ndfa percent was 83.3 when inoculated with Frankia and Vesicular Arbuscular Mycorrhiza at 10kg fertilizer N level. The modest amount of nitrogen fixed was attributed to the low soil fertility and the result of this experiment confirm that Frankia strain Ce 2 can be confidently recommended to inoculate Casuarinas along with Glomus fasciculatum in the field.

Keywords: Casuarina equisetifolia, Frankia, N, Fixation, "N, VA- mycorrhiza

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