Incidence of Gaeumannomyces graminis var. tritici and K deficiency increase rhizospheric denitrification |
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Authors: | K Prade G Trolldenier |
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Institution: | (1) Landwirtschaftliche Forschungsanstalt Büntehof, Bünteweg 8, D-3000 Hannover 71, FRG;(2) Present address: Institut für Umwelt-, Energie- und Geotechnik GmbH, Wilhelm-Will-Str. 7, D-6300 Wetzlar, FRG |
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Abstract: | Wheat inoculated with the root pathogen Gaeumannomyces graminis var. tritici (Ggt) was grown in quartz silt at two levels of potassium nutrition. While in plants well supplied with K the incidence of
Ggt did not affect plant growth, it reduced shoot and root weight of K deficient plants. Denitrification, measured by the
acetylene inhibition technique and expressed as N2O/mg root weight, was increased either by low K nutrition or by Ggt infection. Highest denitrification in the rhizosphere
of plants was found with a combination of both, K deficiency and Ggt attack. |
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Keywords: | denitrification Gaeumannomyces graminis var tritici potassium deficiency rhizosphere wheat |
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