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The allelopathic effect of Euphorbia hirta and Vesicular Arbuscular Mycorrhiza (VAM) on growth of eggplant (Solanum melongena L.)

Ayoub Zeyada Elhag, Talal Sayed Abdelhaleem Musa, Mohamed Osman Gafar

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Int. J. Agron. Agri. Res.6(4), 222-228, April 2015

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Abstract

Pot experiment was conducted in winter (2010/2011), at the experimental farm of the College of Agricultural Studies, Sudan University of Science and Technology, to investigate the allelopathic effect of Euphorbia hirta and Vesicular Arbuscular Mycorrhiza (VAM) on growth of eggplant. 10kg of oven sterilized soil mixture (2:1 silt loam and sand, respectively) were packed in 25×25cm pots. Euphorbia hirta powder at 0.04, 0.08 and 0.12% and 0.2% of VAM w/w of soil were thoroughly mixed, in addition to control with soil mixture only. 1-month old eggplant seedlings were transplanted in each pot. 0.7 g urea was added with the irrigation water twice at three weeks interval from transplanting. Irrigation and pest control were done when required. Evaluated growth parameters were plant height, branches and leaves/plant, shoot and root fresh and dry weight, days to 50% flowering as well as percentage of mycorrihza on root hairs. The experimental units were in completely randomized design with four replications. Addition of E.hirta (0.04%) or VAM increased all plant growth parameters. The highest values, however, were obtained with addition of 0.04% euphorbia with VAM (0.2%). Days to 50% flowering were reduced at the higher euphorbia concentrations (above0.08%). The lower euphorbia concentration (0.04%) increased VAM growth. It could be concluded that E. hirta at low concentrations with mycorrhiza had synergistic effect on growth of eggplant, whereas, high concentrations had antagonistic effects on both eggplant growth and VAM activity. So addition of E. hirta at low concentrations (0.04% as powder) in combination with VAM inoculation could be recommended for good growth of eggplant.

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The allelopathic effect of Euphorbia hirta and Vesicular Arbuscular Mycorrhiza (VAM) on growth of eggplant (Solanum melongena L.)

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