Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

Abstract

T HE PRESENT study was carried out to investigate the effect of high NaCl concentrations on some growth parameters and physiological processes of wheat (Triticum aestivum L.) plant. The results indicated that Gemeza.9 was the most sensitive cultivar to high salinity levels compared to all tested wheat cultivars. Moreover, salinity stress caused a reduction in the germination percentage by 65% and all growth parameters by 21%, 25% and 60% in the lengths of shoot, root and leaf area, also by 27% and 48% in fresh weights of shoot, root and 40% and 75% in dry weights of shoot and root. It also increased the activity of antioxidant enzymes (peroxidase and catalase), lipid peroxidation and ascorbic acid content. Salinity induced increase of osmolytes compounds such as total soluble proteins, carbohydrates and amino acids. Furthermore, all measured yield parameters, the percentage of grain's maturity and productivity were highly decreased. Accordingly, the role of potassium humate and potassium silicate either sole or combined in alleviating the toxic effect of salinity was also studied. Results showed that application of potassium humate as sole had a stimulatory effect higher than potassium silicate or their combination. It increased the germinating percentage by 128% at 200mM NaCl. In addition, potassium humate and potassium silicate increased the photosynthetic activity, decreased the activity antioxidant enzymes (Peroxidase and Catalase) as well as biosynthesis of MDA and ascorbic acid also they induced increase biosynthesis of proteins and carbohydrates in yielded grains. Accordingly, our study recommends the application of potassium humate as an organic fertilizer and potassium silicate as a foliar spray for improving the quality and quantity of the sensitive wheat cultivar Gemeza.9 cultivated in salty lands and increases its productivity.

Effect of Proline and Potassium Humate on Growth, Yield and Quality of Broad Bean under Saline Soil Conditions

“…Abdellatif and Abdel-Ati (2017) stated that humic acid application targeted agreat results on tomato plant growth and productivity as compared with control. Osman et al (2017) recommended that application of PH as a foliar spray for improving the quality and quantity of wheat cultivated in salty lands. Taha and Osman (2018) indicated that addition of PH significantly increased growth parameters and chemical composition related to salt tolerant either inorganic or organic components.…”

Effect of Soil Amendments and Foliar Application of Potassium Silicate on Wheat Plants Grown under Sodicity Conditions

“…of grain spike -1 , spike weight, 1000 grain weight and grain yield, while the rate of 750 mg L -1 K2SiO3 came in the secondorder and lately control treatment (without foliar application). The effective role of potassium silicate in improving the wheat yield and its components under sodicity condition may be attributed to increasing water contents in wheat and photosynthetic efficiency as mentioned by Osman et al (2017). Beside, Bybordi, (2014) reported that potassium silicate increased wheat yield under salt stress.…”

Effect of Humic Acid on Reducing Salt (NaCl) Stress in Broad Bean (Vicia faba L.)

“…Buğday (Triticum aestivum L.)'da 200 mM NaCl uygulaması sonucunda fidelerde sürgün boyları ve gövde yaş ağırlığında sırasıyla %40 ve %75 oranında azalma meydana gelmiştir. Aynı çalışmada humik asit uygulaması sonucu meristem hücrelerindeki çoğalma sonucu sürgün boyu ve gövde yaş ağırlığında %20, %33 artış tespit edilmiştir (Osman et al, 2017).…”