Document Type : Research Paper
Authors
1
Department of Agriculture, Faculty of Technical and Engineering, Payame Noor University, Tehran, Iran. E-mail: Mohammad.Azimi@pnu.ac.ir
2
Department of Agriculture, Faculty of Technical and Engineering, Payame Noor University, Tehran, Iran. E-mail: Alinaghizadeh62@pnu.ac.ir
Abstract
In order to study the morpho-physiological responses and performance of quinoa to silicon fertilization under drought stress conditions, an experiment was conducted at the research farm of Payam Noor University, Gandoman Center, located in Chaharmahal and Bakhtiari Province, during the 2023-2024 agricultural year. The experiment was arranged in a split-plot design based on a randomized complete block design with three replications. The experimental treatments included drought stress at four levels in the main plots (40%, 60%, 80%, and 100% field capacity) and silicon fertilizer application at four levels in the subplots (0, 1, 2, and 3 liters per hectare). The results showed that the highest plant height (105.5 cm), grain yield (1868 kg. ha-1), and biological yield (4690 kg. ha-1) were obtained from the treatment with 100% field capacity and 3 liters per hectare of silicon. Additionally, the highest water use efficiency (1.14 kg. m³) was achieved in the treatment with 40% field capacity and 3 liters per hectare of silicon. Silicon improved traits at all irrigation levels, but for leaf area index, number of seeds per panicle, and water use efficiency, it had a more positive effect in the 40% field capacity treatment compared to the 100% field capacity irrigation treatment. In conclusion, although quinoa has relatively good resistance to drought, the best treatment for higher quinoa yield was 100% field capacity irrigation combined with 3 liters per hectare of active silicon.
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