Wheat is the most important crop in the world and drought is a worldwide challenge. Irrigated wheat production encounters water deficiency after anthesis stage in Ardabil Region. As a biologic fertilizer with natural origin, humic fertilizers have a balancing effect on plants encountering biotic and abiotic stresses. This experiment was conducted in split plot form based on completely randomized blocks in Ardabil. The main factor was combination of irrigation levels with humic fertilizer, whereas the sub factor was genotypes. Results indicated that there is a significant difference between study genotypes in terms of traits such as number of grain per spike, 1000 grains weight and seed yield. In addition, no significant difference was observed in any of the traits in terms of genotype × irrigation levels and humic fertilizer interaction. Humic fertilizer increased the seed yield from 3.05 to 3.53 ton/ha under drought condition. It is recommendable to apply humic fertilizer for organic seed production of wheat especially in cases of drought stress condition after anthesis.
Key words: Wheat, seed, humic fertilizer, drought stress.
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