Effect of Spraying Nutritional Solution "PRO.SOL" and Chelated Iron on Growth and Flowering of Gazania Plant Gazania splenden L.

The aim of this research was to study the effect of spraying nutritional solution "PRO.SOL" and chelated iron on vegetative and floral growth characteristics on Gazania plant. Randomized Complete Block Design (R.C.B.D) was adopted utilizing two applications in three replicates. Three concentration levels of nutritional solution PRO.SOL (10.00, 5.00 and 0.00 mg/L) and four concentration levels of chelated iron (90.00, 60.00, 30.00 and 0.00 mg/L) were applied in this experiment. The interaction between the two factors was also measured. The mean values were compared using L.S.D test at probability level 0.05. Spraying PRO.SOL at concentration 10.00 mg/L or chelated iron concentration level 90.00 mg/L improved growth parameters. There was significant increase in: number of total leaves per plant, shoot dry weight, leaves total chlorophyll content, number of off-shoots, number and length of primary roots, length of the peduncle, number of flowers, number of petals and flower dry weight. Meanwhile leaf carbohydrate contents, phosphorus percentage and leaf iron content were increased significantly compared with the (unsprayed plants). The interaction treatment, spraying nutritional solution PRO.SOL at concentration level 10.00 mg/L with 90 mg L -1 chelated iron had a significant increase in all studied growth parameters, i.e., the number of flowers and petals gave 8.33 flowers and 18.67 petals compared with the control treatment which gave 3.33 flowers and 13.00 petals. Meanwhile leaf carbohydrate contents, phosphorus percentage and leaf iron content increased significantly in comparison with the unsprayed plants which gave the least values.