Journal of Food, Agriculture and Environment

The effect of mycorrhizal fungi on onion (Allium cepa L.) growth and yield under three irrigation intervals at field condition

Author(s):

Sahebali Bolandnazar

Recieved Date: 2009-01-22, Accepted Date: 2009-04-20

Abstract:

For a sustainable agriculture, the use of arbuscular mycorrhizal fungi (AMF) for improving plant performance, mineral nutrition and water uptake has been attracted great attention in recent years. The response of Azar-Shahr red onion to 3 species of mycorrhizal fungi (Glomus versiforme, G. intraradices and G. etunicatum) under 3 irrigation intervals was studied during two consecutive years. Pre-inoculated onion seedlings and un-inoculated ones were transplanted to 6 m² plots. The plants were irrigated every 7, 9 and 11 days after establishment. The results indicated that mycorrhizal colonization significantly increased seedling survival in all irrigation intervals and seedling establishment were increased more than 21% by mycorrhizal colonization. Onions colonized by G. versiforme at 9-day irrigation interval had the highest leaf area at bulbing stage (633.6 cm²) and non-mycorrhizal plants at 11-day irrigation interval had the lowest leaf area (305.2 cm²). Mycorrhizal colonization improved onion bulb yield about 3 fold in comparison with control plants. Onions colonized by G. versiforme and G. intraradices under 7 and 9 day irrigation intervals and G. etunicatum at 7-day irrigation interval produced the highest marketable bulb (more than 35 t/ha) and non-mycorrhizal plants at 11-day irrigation interval had the lowest marketable yield (5.7 t/ha).

Keywords:

Onion, mycorrhizal fungi, yield, irrigation intervals, water stress

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Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 360-362

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