الفهرس 
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Abstract
This study aimed to: The objectives of the present study was to evaluate the effect of pre-soaking or pre-soaking plus spraying with ascorbic acid, humic acid or nicotinic acid on growth characteristics, certain flowering aspects and some important metabolites in fenugreek. Methods& Results: The experiments were arranged in a randomized complete blocks design with 3 replicates. Homogenous seed lot were divided into 7 groups and soaked either in water and MIS ascorbic acid (100 and 200 mg/L) ; humic acid (1500 and 3000 mg/L) and nicotinic acid (100 or 200 mg/L) separately for 5 hours before sowing. At 30 and 45 days after sowing (DAS) each group divided into two subgroups one of them was sprayed with the same concentration of the MIS meanwhile the second subgroup was unsprayed. The most important results could be summarized as follows Growth parameters: In general, the lower level of NA and the higher level of both AsA and HA was more effective for enhancement vegetative growth parameter. In addition, no significant difference was recorded between the two application modes (soaking only or soaking plus spraying) with respect to growth parameters. Flowering characteristics: It was observed that the use of MIS (ascorbic acid, humic acid and nicotinic acid) led to a significant reduce in the number of days until flowering whereas increased number of flowers / plant compared to control during all both seasons.Yield and its components : Higher concentrations of each MIS (ascorbic, humic and nicotinic acids) resulted in the highest values of the yield and its components.The percentage of protein, carbohydrates and fixed oil on seeds : The results obtained indicated that ascorbic, humic and nicotinic acids led to a significant increase in the percentage of protein, carbohydrates and fixed oil compared with control.Metabolites in the seeds (alkaloids - trigonelline - phenols - flavonoids). Results indicated that total flavonoids, total alkaloids and trigonelline contents were increased due to both AsA, HA and NA at their adopted higher levels. On the other hand, total phenols content was decreased in response to the higher level of all tested MIS. Trigonelline content was also increased due to the lower adopted level of all MIS, whereas its effect on secondary metabolites the other was variable. Conclusions: Based on obtained results, it could be concluded that growth and metabolites of fenugreek are amenable to enhancement due to the treatment with either AsA, HA or NA at 200, 3000, 200 mg/l respectively, preferably with AsA at 200 mg/L considering the economic factors. Metabolic enhancement of these substances should increase secondary metabolites contents in plant tissues, epically total alkaloid and trigonelline contents which promote the medicinal value of the plant.