Application of heteroauxin in strengthening phytoremediation of polycyclic aromatic hydrocarbon contaminated soil

The invention relates to the technical field of contaminated soil remediation, and discloses application of heteroauxin in strengthening phytoremediation of polycyclic aromatic hydrocarbon contaminated soil. The grass family is planted in soil contaminated by polycyclic aromatic hydrocarbon, and carbinol aqueous solution of heteroauxin is sprayed on the surface of the soil in the process of plant growth. After growing for 80-90 days, plant bodies are harvested, dried at low temperature and processed in a centralized mode. The application of the heteroauxin in strengthening phytoremediation of the polycyclic aromatic hydrocarbon contaminated soil has the advantages of simple processes, low cost and in-situ remediation, does not cause influence or damage on the surroundings, and is good in remediation effect of organic contaminated soil of polycyclic aromatic hydrocarbon and the like and applicable to remediation of the organic contaminated soil.