Effect of GA_3 Treatments on Seed Germination Dynamics of Natural Vetiver Grass in Western Guangdong Province
The vetiver seeds of western Guangdong harvested in July-December were immersed in gibberellin(GA3)solution with concentrations of 100,200,300 and 400 mg/kg respectively for 8 hours.The results showed that the germination energy,germination rate and germination index gradually increased from July to October,and decreased from November to December.The GA3 might help the germination of vetiver seeds with the concentration of 100 to 400 mg/kg.The highest germination energy,germination rate and germination index of vetiver seeds,12.00%,14.00%,15.51%,respectively,were found for treatment with the concentration of 100 mg/kg of GA3 in October.But the transplanting survival rate for the Treatment was the lowest.