The effect of mycorrhiza and phosphorus fertilizer application on some corn quantitative and qualitative traits under drought stress

Subject Areas : Agroecology Journal

Amirreza Pourrafezi ¹ (Master student of Biology Ardabil Branch, Islamic Azad University, Ardabil, Iran)
Ahmad Afkari ² (Assistant Professor, Department of Agronomy and Plant Breeding, Kaleybar Branch, Islamic Azad University, Kaleybar, Iran)

Received: 2017-01-14 Accepted : 2017-04-26 Published : 2017-04-21

Keywords: o plant nutrition, o triple super-phosphate, o water deficient stress, o phosphorus availability,

Abstract :

Water deficient is one of the most important factors limiting yield of field crops in arid and semi-arid regions. To investigate the effects of mycorrhizal fungi and phosphorus fertilizers on some quantitative and qualitative traits of corn under water deficient stress; an experiment was carried out as split factorial based on completely block randomized design with three replications in Research Station of the Faculty of Agriculture, Islamic Azad University, Ardabil Branch in 2015. The experimental treatments included inoculation with two mycorrhizal fungi species of Glumus mosseae and Glumus etanicatum, phosphorus fertilizer from triple superphosphate source at levels of 75, 100, and 125 kg/ha, and irrigation at levels of 70, 140, and 210 mm evaporation from class A evaporation pan. The effect of irrigation, phosphorus fertilizer and mycorrhiza on all measured traits was significant at 1% probability level. Also interaction of phosphorous fertilizer and mycohrriza was significant in plant height, grain yield, plant dry weight, nitrogen percentage and the phosphorous concentration was significant. Increasing in drought stress caused decrement in plant height, ear length, number on grains per ear, plant dry weight, grain yield, nitrogen percentage and leaf phosphorus content, but increment in leaf potassium percentage content. Furthermore, inoculation with mycorrhiza along with with phosphorus fertilizer at 125 kg/ha, significantly increased agronomic indices and phosphorus and potassium contents of corn leaves under of water stress conditions. On the whole, implementation of mycorrhizal fungi along with phosphorus fertilizer in planting bed caused tolerance enhancement in corn against drought stress through influencing on some physiological characteristics.

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