The Role of Regular and Nano-Chitosan in some Indicators of Vegetative and Root Growth of Tecoma stans (L.) Seedlings Under Different Levels of Water Stress

Abstract

Abstract A factorial experiment was conducted with three factors, the first using three levels of water stress (50, 75 and 100%) of the field capacity value, the second spraying seedlings of Tecoma stans (L.) Juss. ex Kunth with regular chitosan in three concentrations (0, 150 and 300 mg.L-1), and the third spraying seedlingsat with nano-chitosan in three concentrations (0 and 150 and 300 mg.L-1). arithmetic mean of the coefficients was compared. Statistically according to Duncan’s Multiple Range Test. The results of the single effect of water stress showed the superiority of the seedlings that were treated with light water stress treatment by (100%) of the field capacity value, as well as the single effect of the regular and nano-chitosan biofertilizer, the superiority of the seedlings that were treated with a concentration of (300 mg.L-1) in the increase in the height of the seedlings, the increase in the diameter of the main stem of the seedling, main root length and root volume in the increase in the height of the seedlings, the increase in the diameter of the main stem of the seedling, main root length and root volume.