Influence of Salicylic Acid on Growth, Yield and Macro-elements Absorption of Fennel (Foeniculum vulgare Mill.) under Water Stress

The present study was conducted in order to investigate the effect of salicylic acid on growth, yield and macro-elements absorption of fennel in split-plot as base on randomized complete block design (RCBD) with three replications in Tehran, Iran. Irrigation regime as main plot was undergone in ۵ levels that included: I۱: full irrigation, I۲: cut off irrigation at stem elongation stage, I۳: cut off at budding stage, I۴: cut off irrigation at ۵۰% flowering stage and I۵: cut off irrigation at grain filling stage. Foliar application of SA (۰, ۳, ۶, and ۸ mM) as sub plot was applied at stem elongation, budding and ۵۰% flowering stages. Result indicated application of SA was resulted to increase biological yield in all irrigation regimes. However, application of ۶ mM SA had the most biomass under water stress at grain filling stage. Interaction of water stress and SA demonstrated that application of ۳ mM SA had the most grain yield under full irrigation, water stress at stemming and water stress at grain filling stages, while application of ۹ mM SA had the highest grain yield under water stress at budding and ۵۰% flowering stages.

کلیدواژه ها:

Grain yield ، Macro-elements ، Medicinal herb ، salicylic acid ، Water stress