Effect of on-farm seed priming and foliar application of amino acids on some growth indices and yield of rainfed wheat under supplementary irrigation conditions

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Document Type : Research Paper

Authors

1 Department of Plant Production and Genetics, Faculty of Agriculture, Bu-Ali Sina University

2 Agronomy Department, Faculty of Agriculture, Bu-Ali Sina University

3 Department of Seed and Plant Improvement, Agricultural and Natural Resources Research and Training Center, Hamedan, Iran

Abstract

Background and Objective: This research was conducted with the aim of investigating the interactions of on-farm seed priming, foliar application of two amino acids, and supplementary irrigation on improving some growth indices and yield of rainfed wheat.
Materials and Methods: The experiment was conducted in Hamedan in the cropping year 2020-2021 in the form of a three-factor factorial based on a randomized complete block design with three replications. The first factor was supplementary irrigation (planting, flowering, grain filling, no supplementary irrigation). The second factor was on-farm seed priming (primed and non-primed). The third factor involved foliar application of amino acid (methionine, lysine, and pure water).
Results: Supplementary irrigation during the flowering and grain filling increased the maximum leaf area index by 45% and 35%, respectively, and the maximum total dry matter by 24.3% and 10.7%, respectively. The maximum leaf area index and total dry matter were 7.7% and 6% higher, respectively, with seed priming compared to no-priming. The application of both amino acids increased the maximum leaf area index and crop growth rate by 6.9% and 12.5%, respectively, compared to pure water. The relative growth rate increased by 12.5% with supplementary irrigation during the flowering only. Irrigation during the grain filling with the application of methionine was more effective in enhancing yield compared to lysine.
Conclusion: Supplementary irrigation during the flowering, along with foliar application of amino acids and on-farm seed priming, can lead to the improvement of growth and yield of rainfed wheat by reducing drought stress intensity.

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION

Articles in Press, Accepted Manuscript
Available Online from 22 October 2025

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