Improvement in ryegrass seed germination for diesel contaminated soils by peg treatment technology

摘要

Phytoremediation of petroleum contaminated soils has been recognized s a potentially cost effective treatment technology and has gained much attention recently. Because grasses have fibrous root systems which can provide high surface areas for the soil microbial population to increase bioremediation in the rhizosphere, many researchers choose grass species as plants wit great potential I the phytoremediation of petroleum contaminated soils. The presence of volatile petroleum hydrocarbons in soils at relatively low concentration (4000-8000 mg kg ~-1 dry soil) could severely hinder seed germination resulting in poor plant establishment.