Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 53 1 2022 03 21 Effect of potassium silicate, calcium chloride and nanosilicate on yield, yield components, photosynthetic pigments and proline in sweet corn under differentirrigation regimes Effect of potassium silicate, calcium chloride and nanosilicate on yield, yield components, photosynthetic pigments and proline in sweet corn under differentirrigation regimes 39 54 87204 10.22059/ijfcs.2021.284502.654624 FA Tahereh Drikvand Agronomy Department, Faculty of Agriculture, Tarbiat modares University, Tehran, Iran Seyed Ali Mohammad Modarres-Sanavy Agronomy Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran Majid Aghaalikhani Agronomy Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran Ali Heidarzadeh Department of Agronomy, Faculty of Agriculture, University of Tarbiat Modares, Iran Journal Article 2020 08 11 Effect of potassium-silicate, calcium chloride and nano-silicate spray was investigated on yield, yield components and some physiological properties of sweet corn under irrigation regimes in a split plot experiment based on a complete block design with three replications in 2017. Experimental treatments were irrigation regimes as optimal irrigation, moderate and severe water deficit stresses, irrigation after 35%, 55% and 75% depletion of available water in the root zone as the main factor and foliar applications of 1000 and 2000 ppm potassium silicate and calcium chloride , 1000 ppm  nano-silica, pure water and without foliar application as sub plots. The highest grain (6588 kg ha^-1), biomass (36050 kg ha^-1) and dry forage (30417 kg ha^-1) yields were obtained from the main effect of foliar application of 1000 ppm potassium silicate. In water deficit conditions, application of potassium silicate significantly increased grain yield, so that potassium silicate in optimal irrigation conditions, moderate and severe irrigation increased grain yield 7, 25 and 49% compared to non-foliar application, respectively. In intensive irrigation regime the conditions, these increases were -9.29 and 9.82%, for calcium chloride and nano-silica, compared to the control (without foliar). Therefore, according to the results of this study, it can be stated that foliar application of potassium silicate was more efficient in deficit irrigation conditions in sweet corn.<br />  Effect of potassium-silicate, calcium chloride and nano-silicate spray was investigated on yield, yield components and some physiological properties of sweet corn under irrigation regimes in a split plot experiment based on a complete block design with three replications in 2017. Experimental treatments were irrigation regimes as optimal irrigation, moderate and severe water deficit stresses, irrigation after 35%, 55% and 75% depletion of available water in the root zone as the main factor and foliar applications of 1000 and 2000 ppm potassium silicate and calcium chloride , 1000 ppm  nano-silica, pure water and without foliar application as sub plots. The highest grain (6588 kg ha^-1), biomass (36050 kg ha^-1) and dry forage (30417 kg ha^-1) yields were obtained from the main effect of foliar application of 1000 ppm potassium silicate. In water deficit conditions, application of potassium silicate significantly increased grain yield, so that potassium silicate in optimal irrigation conditions, moderate and severe irrigation increased grain yield 7, 25 and 49% compared to non-foliar application, respectively. In intensive irrigation regime the conditions, these increases were -9.29 and 9.82%, for calcium chloride and nano-silica, compared to the control (without foliar). Therefore, according to the results of this study, it can be stated that foliar application of potassium silicate was more efficient in deficit irrigation conditions in sweet corn.<br />  https://ijfcs.ut.ac.ir/article_87204_eab79291481832f1f9d4bd8b8b87dec1.pdf