Improvement of Selected Morphological, Physiological, and Biochemical Parameters of Roselle ( L.) Grown under Different Salinity Levels Using Potassium Silicate and Extract.

Two successive field trials were carried out at the experimental farm of the Agriculture Department of Fayoum University, Fayoum, Egypt, to investigate the sole or dual interaction effect of applying a foliar spray of extract (Ae) or potassium silicate (KSi) on reducing the stressful salinity impacts on the development, yield, and features of roselle ( L.) plants. Both Ae or KSi were used at three rates: 0% (0 cm L), 0.