Volume 17, Issue 63 (Spring 2013)
jwss 2013, 17(63): 123-136 |
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M. Ghorchiani, GH. Akbari, H. A. Alikhani, M. Zarei, I. Allahdadi. Effect of Arbuscular Mycorrhizal Fungi and Pseudomonas fluorescens on Phosphorus Fertilizer Use Efficiency, Mycorrhizal Dependence and Maize Yield under Water Deficit Conditions . jwss 2013; 17 (63) :123-136
URL: http://jstnar.iut.ac.ir/article-1-2547-en.html
URL: http://jstnar.iut.ac.ir/article-1-2547-en.html
, halikhan@ut.ac.ir
Abstract: (16897 Views)
In order to evaluate the effect of arbuscular mycorrhizal (AM) fungi and Pseudomonas fluorescens bacteria on phosphorus fertilizer use efficiency, mycorrhizal dependence and grain yield and dry matter yield of maize under water deficit conditions, a field experiment was conducted as split-split plot arrangement based on randomized complete block design with three replications. The treatments in this experiment were included as follows: irrigation (normal irrigation and water deficit stress based on evaporation from class A pan evaporation) combined different seed inoculations with AM and Pseudomonas fluorescens and treatment of chemical phosphate fertilizer (non- consumption of phosphate fertilizer, consumption of 50 percent of triple superphosphate fertilizer needed, and consumption of rock phosphate, based on the quantity of consumed phosphorus of triple superphosphate source). The results showed that effects of irrigation, seed inoculation with AM and Pseudomonas fluorescens biological phosphate fertilizer and chemical phosphate fertilizer were significant on yield and yield components, dry matter yield, relative agronomic efficiency and root colonization. Mild stress significantly reduced grain yield, relative agronomic efficiency and fertilizer agronomic efficiency compared to optimum irrigation. Results showed that grain and dry matter yield are highly correlated with root colonization under mild stress condition. Maximum mycorrhizal dependence was obtained in mild stress condition. Maximum relative agronomic efficiency, fertilizer agronomic efficiency, yield and yield components was related to seed inoculation with AM and Pseudomonas fluorescens. The use of triple superphosphate fertilizer were increased grain yield in comparison with rock phosphate along with inoculation of phosphate solubilizing microorganisms. However, maximum root colonization and mycorrhizal dependence was achieved in non- consumption treatment of phosphate fertilizer.
Keywords: Relative agronomic efficiency, Pseudomonas fluorescens, Maize, Arbuscular mycorrhizal fungi, Mycorrhizal dependence.
Type of Study: Research |
Subject:
Ggeneral
Received: 2013/06/2 | Accepted: 2013/06/2 | Published: 2013/06/2
Received: 2013/06/2 | Accepted: 2013/06/2 | Published: 2013/06/2
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