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| Articles
by
Mohammad Miransari |
Total Records (
2 ) for
Mohammad Miransari |
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Saeid Ghahari
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Mohammad Miransari
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Eight and ten rice cultivars were tested in laboratory and greenhouse bioassay, respectively to evaluate the allelopathic effects of rice (Oryza sativa L.) hull extracts on the growth parameters of different rice cultivars. Extracts of rice hulls at different concentrations including 0, 5, 10 and 15% were produced and used to treat seeds of different rice cultivars. The growth parameters of germinated rice seeds after incubation for 12 days in the germinator were evaluated. In the greenhouse experiment, the treated seedlings were harvested at 21 days after planting and growth parameters determined. Treatments were combined factorially in both experiments, which were performed on the basis of a complete randomized design. Both positive and adverse effects of rice extracts on the growth of different rice cultivars in both experiments were observed. Although, the growth of genetically modified cultivars were greatly superior to the local ones, the inhibitory effects of their extracts were very much clear on the growth of different cultivars. This indicates that more modification of these cultivars, with respect to the related rice phytotoxicity potential and the response of rice cultivars to phytotoxins is necessary. Thus, there are some kinds of interactions between different rice cultivars, greatly influencing their production efficiency. |
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S. Samarbakhsh
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F. Rejali
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M.R. Ardakani
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F. Pak Nejad
and
Mohammad Miransari
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With respect to the significance of the combined effects of fungicides application and Arbuscular Mycorrhizal fungi on the growth and yield of different crop plants such as corn (Zea mays L.) a field experiment was conducted. The objectives were to determine: (1) the combined effects of different fungicides and different arbuscular mycorrhiza (AM) species on the growth and yield of corn and (2) the efficiency of different AM species in symbiosis with corn plants, treated by different fungicides, under field conditions. Four AM treatments including control (M0), Glomus mosseae (M1), G. etunicatum (M2) and G. intraradices (M3) and four fungicide treatments including control (F0), benomyl (F1), vitavax (F2) and captan (F3) were tested in a factorial fashion on the basis of a completely randomized block design in three replicates in 2006. Different species of AM significantly affected corn growth and yield when subjected to different fungicides treatments. G. mosseae and corn plants established the most efficient symbiosis. In addition, fungicide benomyl had the least unfavorable effects on the colonization of corn roots by AM species. Determination of the appropriate rates of fungicides for treating seeds to alleviate the unfavorable effects of fungicides on plant growth, especially when in symbiosis with AM species, is of great significance. |
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