Document Type : Research Paper

Authors

1 M.Sc. Student, Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran.

2 Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran.

Abstract

In order to study the effect of 0.05 g.L-1 Uniconazole and biofertilizers application on yield, chlorophyll content and grain filling components of wheat using segmented model under soil salinity conditions, an experiment was carried out as factorial based on randomized complete block design with three replications. Factors were included soil salinity in four levels (non-application of salinity as control and 40, 80 and 120 mM salinity in soil), by NaCl and single and combination application of Uniconazole and bio fertilizers (1) control or without bio fertilizers and Uniconazole, (2) mycorrhiza fungi, (3) Uniconazole, (4) Pseudomonas putida, (5) mycorrhiza with Pseudomonas putida, (6) mycorrhiza with Uniconazole, (7) both application of mycorrhiza with Uniconazole and Pseudomonas). A segmented model was used to quantifying the grain filling parameters. The results showed that both application of mycorrhiza with Uniconazole and Pseudomonas under no salinity condition increased the content of chlorophyll a, total chlorophyll, carotenoid, root weight and volume (39.8, 51.6, 47.2, 97.9 and 54.7% respectively) and also maximum of grain weight, grain filling period, effective grain filling period and grain weight (78.4, 21.8, 32.2 and 108.8% respectively) in comparison with no application of bio fertilizers and Uniconazole under the highest soil salinity level. Based on the results, bio fertilizers and Uniconazole application can be suggested as a proper approach for increasing of yield and grain filling period of wheat under soil salinity condition.

Keywords

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