Degradation of diesel fuel in rhizosphere soil

摘要

Little is known regarding the ability of the plant rhizosphere to decompose diesel range organic (DRO) compounds in soil. A growth chamber study was conducted to assess the decomposition of DROs in soil as affected by grasses and legumes. A sandy loam soil was contaminated with 2/100 (w/w) commercial diesel fuel, and was treated with: (a) mixed NPK fertilizer; (b) urea; (c) glucose; and (d) control (i.e., no additives). Soil was seeded with either a grass mix (Poa, Phleum, Agrostis), a legume mix (Pisum sativum, Trifolium pratense); or no vegetation; and incubated. Over 150 days, approximately 10.6/100 of DROs was Lost by volatilization.