简介:Background:Ineconomicallyoptimalmanagement,treesthatareremovedinathinningtreatmentshouldbeselectedonthebasisoftheirvalue,relativevalueincrementandtheeffectofremovalonthegrowthofremainingtrees.Largevaluabletreeswithdecreasedvalueincrementshouldberemoved,especiallywhentheyovertopsmallertrees.Methods:Thisstudyoptimizedthetreeselectionruleinthethinningtreatmentsofcontinuouscovermanagementwhentheaimistomaximizetheprofitabilityofforestmanagement.Theweightsofthreecriteria(stemvalue,relativevalueincrementandeffectofremovalonthecompetitionofremainingtrees)wereoptimizedtogetherwiththinningintervals.Resultsandconclusions:Theresultsconfirmedthehypothesisthatoptimalthinninginvolvesremovingpredominantlylargetrees.Increasingstumpagevalue,decreasingrelativevalueincrement,andincreasingcompetitiveinfluenceincreasedthelikelihoodthatremovalisoptimaldecision.However,ifthespatialdistributionoftreesisirregular,itisoptimaltoleavelargetreesinsparseplacesandremovesomewhatsmallertreesfromdenseplaces.However,thebenefitofoptimalthinning,ascomparedtodiameterlimitcuttingisnotusuallylargeinpureone-speciesstands.Onthecontrary,removingthesmallesttreesfromthestandmayleadtosignificant(30-40%)reductionsinthenetpresentvalueofharvestincomes.