الفهرس 
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Abstract
The sage plant (Salvia officinalis L.) is one of the family labiatae. It’s a perennial herb. Itwas found in its natural condition in Spain along the Mediterranean Coast. It was used in ancient Egypt for different purposes such as restoring old age and restoring energy. It is widely used as atreatment agent for many diseases. The most recent medical application of sage plant is used for treating nervous conditions and Alzheimer’s disease. This work aimed to investigate the effect of different laser sources (He-Ne and Ar) on sage plant growth improvement separately or combined with humic substances (HS) and amino acid (AA). The seeds of sage plant were exposed to He–Ne laser irradiation (λ=632.8 nm, power density 95.4 mW/cm and exposure times 10, 15 and 20 min) and Ar laser (λ=514.5 nm, power density 94.3mW/cm 2 and exposure times 10, 15 and 20min) as a physical treatment agent. Humic substances (0.2%, 0.4% and 0.6%) and amino acids (Terra-Sorb® 4 marco radicular and Terra-Sorb® foliar) were used as chemical treatment agent. The results of the effect of these agents were compared with the control. The effect of all reatments on the sage plant cultivation improvement was studied as a function of essential oil yield increase and over ground herb trails improvement. plant height, number of branches/plant, fresh weight, dry weight, essential oil percent, chlorophyll a, chlorophyll b, carotenoids, nitrogen percent, phosphorus percent, potassium percent, total carbohydrates, protein percent, concentrations of indole-3-acetic acid and gibberellic acid and the composition of essential oil samples were determined. The main obvious results of this study could be summarized as follows: It was found that 0.6% humic substances treatment with He-Ne laser exposure at 10 minute gave the highest values of the dry matter and the essential oil percentage (11.9 tons/feddan and 4.57% respectively) of sage plant compared with control (2 tons/feddan and 2% respectively) followed by the combined treatment of amino acid treatment A with He-Ne laser exposure at 10 minutes (10.3 tons/feddan and 4.2% respectively). On the other hand, amino acid treatment (C) with 20 minute Ar laser exposure showed the lowest values of dry matter and the essential oil percentage (1.53 tons/feddan and 1.5% respectively). The result of this work may introduce promising treatment modalities for improving the sage plant cultivation. This is very important for future plants of doubling of medicinal plant yield in the same land area and the same irrigation water amount.