The Effect of Humic Acid on the Uptake and Removal of Prometryn by Vetiver Grass

Green house study was carried out to investigate the effect of humic acid on the uptakeing and removal of prometryn from hydroponic media by vetiver grass. GC-MS (Agilent 7890B-5977MSD, USD) was used for qualifying and quantitying theprometryn from the solution and plant samples. The results showed that humic acid (200 mg/L) had no significant effect on the absorption and removal of prometryn from the nutrient solution by vetiver grass, but the initial concentration of humic acid 200 mg/L could significantly promoted the absorption of prometryn by the roots of vetiver grass, and inhibit prometryn from the roots of vetiver grass transferd to the shoots significantly.