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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10081

Title: Mycorrhizal Role on Phosphorus-Zinc Interaction in Calcareous Soil Cultivated With Corn(Zea maizeL.)
Authors: A. M. Heggo
F. N. Barakah
Issue Date: 1994
Abstract: Two pot experiments were designed in green house to investigate the effect of VA mycorrhizal fungi on phosphorus-zinc interaction. The influence was evaluated by cultivation of corn plants in a calcareous soil which fertilized with either high or low rates of P and Zn fertilization. Inoculation by VA mycorrhizal spores were applied using previously isolated spores which were added as a pellet containing about 300 spores/seed. Dry weight of plant shoots, phosphorus, nitrogen and micronutrient concentration and contents in corn shoots were determined. Mycorrhizal colonization in plant roots was calculated after washing and staining root samples. Data cleared that plant growth as well as macro and micronutrient in maize shoots were increased significantly by mycorrhizal inoculation. Dry weight of corn shoots reached about 1.5 fold more than control when VAM inoculated soil received P and Zn fertilizers in high rates. On the other hand, increases over control were more than four folds when P and Zn fertilizers added at low rates. Phosphorus concentrations and content in plant shoots increased significantly by mycorrhizal inoculation and phosphorus fertilization. High P percentages and contents were found in shoots of the plants grown in soil received 200 ppm of P fertilizer or 50 ppm P and inoculated with mycorrhizal spores. Phosphorus contents in corn shoots reached six times than control when soil received 50 ppm of P and VAM inoculant. Also N contents in maize shoots increased significantly by mycorrhizal inoculation combined with P and Zn fertilization. Inoculation of soil fertilized by 10 ppm P and 5 ppm Zn led to an increase in N content in plant shoots reached to three times than control. Zinc concentration in corn shoots were decreased by application of P in high rates, while VAM inoculation resulted an increase in Zn concentrations and contents. Peak of Zn contents in corn shoots was found when inoculated soil received 50 ppm of P and 10 ppm of Zn. Iron concentrations in plant shoots were increased by mycorrhizal inoculation, but decreased by application of high rates of P fertilizer. Inoculation and/or phosphorus fertilization led to significant increases in Mn concentration in corn shoots. High concentrations were found in inoculated soil received 50 ppm of P and 15 ppm of Zn fertilizers. Copper were found to increase by VAM inoculation. In contrast, application of high rates of P fertilizer led to a decreases in Cu concentrations in maize shoots. VAM colonization in corn roots were increased significantly by mycorrhizal inoculation, while fertilization with P in high rates resulted in reduction of mycorrhizal colonization. Highest percentages (76.6 %) were found when inoculated soil received P-fertilizer only in the rates of 10 ppm.
URI: http://hdl.handle.net/123456789/10081
Appears in Collections:College of Foods And Agricultural Science

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