الفهرس 
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Abstract
The scope of the current study was to examine the main and interaction effects of NaCl as soil application, water regimes and salicylic acid as foliar spraying on growth and productivity of chili pepper (Capsicum frutescens L.) plants. Therefore, a pot experiment was conducted during the summer seasons of 2016 and 2017 in the Experimental Farm, Faculty of Agriculture, Fayoum University. The experimental layout was a split-split plot system in a Randomized Complete Blocks Design with three replications. Salinity levels (0.0, 3000, 6000 and 9000 ppm NaCl) were randomly distributed in the main plots and water stress treatments (100, 70 and 40 % based on field capacity) were assigned to sub plots whilst, salicylic acid concentrations (0, 100 and 200 ppm) were allocated in the sub-sub plots.
Gained results displayed that in both seasons of study the level of soil salinity at 9000 ppm NaCl or water stress of (40% F.C.) reflected the negatively significant influences on all growth attributes of chili pepper plants including plant height, stem diameter, No. of branches and leaves/plant, leaf area, fresh and dry weights of different plants parts, as well as fruits yield and its parameters including (No. of fruits/plant and fresh and dry weights of fruits). However, leaf thickness affected positively under the same levels of either salinity or drought stresses and resulted in the greatest values in this concern. Furthermore, irrigated chili pepper plants with (70% F.C.) improved fruit yield parameters and resulted in the highest fruits number/plants, fresh and dry weights of fruits/plant in both seasons of 2016 and 2017. Foliar application of salicylic acid at the concentration of 100 and/or 200 ppm was remarkable in the aforementioned traits in comparison with unsprayed plants