简介：Thesorption-desorptionbehaviorofdicyandiamide(DCD)isanimportantchemicalprocessthataffectsDCDfateandmobilityinsoils.Therefore,thisstudyquantifiedDCDsorption-desorptiononaphaeozem(Mollisol),aburozem(Alfisol),asoilwithorganicmatter-removedandpeathumususingthebatch-equilibrationprocedure,andidentifiedsoilpropertiesthatinfluencedDCDsorption.Thesorptiononpeathumuswashigherthanthatonthephaeozemandtheburozem,withmuchlowersorptionobservedonthesoilwithorganicmatter-removed,indicatingthatsoilorganicmatterwasthemaincarrierofDCDsorption.DuetoitsamphipathicpropertytheDCDmoleculesorptiononthephaeozemandtheburozemdecreasedaspHincreasedfromabout2to5,butafurtherincreaseinpHledtoariseinDCDsorption.TheDCDdesorptionhystereticeffectforpeathumuswasgreaterthanthatforthephaeozemandtheburozemusing0.01molL-1CaC12asthebackgroundelectrolyte,suggestingthatthehydrophobicdomainsoforganicmattermayplayanimportantroleinDCDsorption.