Effect of spraying number and type of growth regulator on growth, leaves yield andAntioxidant Activity for Fenugreek leaves

The experiment was conducted in one of a private field during the winter season (2017-2018) inBabylon province, Al-Taliaa district, to know the effect of spraying number (one, two, three spraying)and the type of growth regulators (GA3, NAA, GA3×NAA) as well as control treatment on growthIndicators (plant height, the number of secondary branches, the number of leaves, leaf area, leaf areaindex, total chlorophyll pigments in leaves), leaves yield (fresh weight, the dry weight, the yield of unitarea from the fresh and dry leaves) and antioxidant activity of seeds (total phenolic compounds, totalantioxidant capacity and The percentage of free radical scavenging). The treatments were distributed onfactorial experiment according to randomized complete block design, with three replicates, the averageswere compared by using least significant difference at probability level of 0.05. The results showed thatthere were significant differences in the number of sprayings and the type of growth regulator in mostIndicators of growth and fresh and dry leaves yield. The treatment of twice spraying with NAA gave thehighest values in the seeds content of total phenolic compounds and the total antioxidant capacityamounted of (257.88, 53.69 mg 100 g-1dry weight). The treatment of Twice spraying with GA3×NAAgave the highest averages in the percentage of free radical scavenging in seeds amounted of (79.83 %).