Influence of Mycorrhizal Inoculation, Form of Phosphate Fertilization and Watering Regime on Nodulation and Yield of Soybean

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Mahdi, A.A.
Nur Eldaim, A.B.
Arbab, A.A.
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Faculty of Agriculture, University of Khartoum, Shambat, Sudan
Pot and field investigations were conducted during 1999/2000 on the influence of arbuscular mycorrhizal (AM) fungi, form of phosphate fertilization and watering regime on soybean nodulation and growth in sand and clay soils. Nodulation and plant growth were significantly enhanced by mycorrhization and by P fertilization, but the effect was greater in presence of both treatments. Nodulation in the sandy soil was strictly dependent on the presence of mycorrhizal fungi, while in clay soil either AM fungi or P fertilization could enhance nodule formation. Triple superphosphate was superior to monophosphate in this respect Increase in mycorrhizal colonization was associated with a corresponding increase in plant N and P contents.
Page(s):12 (3), 345-356,15 Ref.