Enhancement of nitrogen fixation in lentil,faba bean,and soybean by dual inoculation with Rhizobia and mycorrhizae |
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Authors: | S M S Badr El-Din H Moawad |
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Institution: | (1) Soil Microbiology Lab., National Research Centre, Dokki, Cairo, Egypt |
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Abstract: | The combined effect of Vesicular Arbuscular Mycorrhizae (VAM) and Rhizobium on the cold season legumes, lentil and faba bean,
as well as on summer legume, soybean, were studied in soils with low indeginous VA mycorrhizal spores. Inoculation of the
plant with VA mycorrhizal fungi increased the level of mycorrhizal root infection of lentil, faba bean and soybean. The inoculation
with Rhizobium had no significant effect on VA mycorrhizal infection percent, but VA mycorrhizal inoculation increased nodulation
of the three legumes.
The inoculation with Rhizobium alone significantly increased plant dry weight and N content of lentil and faba bean as well
as seed yield of soybean. VA mycorrhizal inoculation also significantly increased plant dry weight and phosphorus content
of the plants as did fertilization with superphosphate. Rock phosphate fertilization, however, had no significant effect on
plant growth or phosphorus uptake. The addition of rock phosphate in combination with VA mycorrhizal inoculation significantly
increased plant dry weight and P uptake of the plants.
The dual inoculation with both rhizobia and mycorrhizae induced more significant increases in plant dry weight, N and P content
of lentil and faba bean as well as seed yield of soybean than inoculation with either VA mycorrhizae or Rhizobium alone. |
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Keywords: | faba bean lentil mycorrhizae N2 fixation nodulation Rhizobia soybean |
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