Release of Soil Nonexchangeable K by Organic Acids-中国期刊网

摘要 TheamountsofsoilnonexchangeableKextractedwith0.01mL/Loxalicacidandcitricacidsolutionsandthatwithboiling1mL/LHNO3fortenminuteswereremarkablysignificantlycorrelatedwitheachother,andtheamountextractedwiththeoxalicacidsolutionwashigherthanthatwiththecitricacidsolution.ThesoilnonexchangeableKreleasewascomprisedoftwofirst-orderkineticprocesses.ThefasteronewasascribedtotheinterlayerKinoutersphere,whilethesloweronetothatininnersphere.TherateconstantsofthesoilnonexchageableKweresignificantlycorrelatedwiththeamountsofnonexchangeableKextractedwithboiling1mL/LHNO3fortenminutes.Studyonthefitnessofdifferentkineticequationsindicatedthatthefirst-order,parabolicdiffusionandzero-orderequationscouldalldescribethereleaseofsoilnonexchangeableKwell,butElovichequationwasnotsuitabletodescribeit.

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Release of Soil Nonexchangeable K by Organic Acids

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Release of Soil Nonexchangeable K by Organic Acids

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