Effect of Potassium Nano Chelate on Physiological and Yield Characteristics of Barley in Phenological Stages under Irrigation Cut-Off Conditions
Subject Areas : Journal of Crop Ecophysiologymohammad sayahi 1 , مانی مجدم 2 * , Alireza Shokuhfar 3
1 - Master's graduate student, Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 - گروه زراعت، دانشگاه آزاد اسلامی واحد اهواز، اهواز، ایران.
3 - Associate Professor Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Keywords: Foliar application, Grain yield, Irrigation holding is better, Stomatal conductance,
Abstract :
In order to effect of potassium nano chelate on physiological and yield characteristics of barley in irrigation cut-off conditions, this research was done as split plot in randomized complete blocks design with three replications. Main treatment consisted: full irrigation, no irrigation at the beginning of stem elongation, and no irrigation at the pollination stage and sub treatment consisted: no foliar application (control), 35 mg.L-1 and 65 mg.L-1 potassium nano chelate. results showed that the effect of deficit irrigation cut-off and potassium nano-chelate on number of spikes, number of seeds per spike, weight of 1000 seeds, grain yield, stomatal conductance, canopy temperature and relative water content leaf were statistically significant at 1% level of probability. Interaction irrigation cut-off and potassium nano-chelate number of spikes, weight of 1000 seeds, in canopy temperature and relative water content leaf were significant at 1% probability and stomatal conductance at 5% probability level. The highest grain yield was in full irrigation (control) (5308 kg.ha-1) and 65 mg.L-1 potassium nano-chelate (4854.9 kg.ha-1) and the lowest was in irrigation at anthesis (3169.4 kg.ha-1) and no foliar application (control) (3588 kg.ha-1). the maximum relative water content of leaf was in complete irrigation (control) and foliar application of 65 mg.L-1 potassium nano-fertilizer (73.13%) and the minimum was in non-irrigation at anthesis and non-foliar application of potassium nano-fertilizer (35.99%). maximum stomatal coductance was in complete irrigation (control) and foliar application of 65 mg.L-1 potassium nano-fertilizer (185.87 mlmol.m-2s-1) and the minimum was in non-irrigation at anthesis and non-foliar application of potassium nano-fertilizer (47.99 mlmol.m-2s-1). as a result, foliar application of 65 mg.L-1 potassium nano-fertilizer at different irrigation cut-off periods cause improves grain yield and leaf water in comparison to control (no foliar application) and is recommended.
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