Effect of Biostimulants on Germination and Early Growth Properties of Radish

Some biostimulants can be employed to increase metabolic efficiency and thus improvegermination. The effect of the biostimulants usually depends on the type of biostimulant, its concentration and theplant species. The aim of this study was to investigate the effects of different biostimulants at varying doses onradish germination and early growth properties. In study factorial treatments of four biostimulants [fulvic acid(FA), amino acid (AA), chitosan oligosaccharide (CO) and seaweed extract (SWE)] and four levels ofbiostimulants (FA: 2.5-40 mg/100 ml; AA: 0.5-8 mg/L; CO: 2.5-40 mg/100 ml; SWE: 2.5-40 mg/100 ml) wereevaluated. In the control group, seeds were treated with distilled water and the effect of biostumulnat doses wascompared with control group. The experiment was conducted in a factorial experiment based on completelyrandomized design (CRD) with three replicates consisted of two petri dishes containing 100 seeds each.Germination percentage (GP), germination index (GI), mean germination time (MGT), time to 50% germination(T50), mean germination rate (MGR), coefficient of variation of germination time (CVt), vigor index (VI), peakvalue (PV), hypocotyl length, sprout length, stem diameter and sprout fresh weight were recorded