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1、摘要本文利用胡楊林同一標(biāo)準(zhǔn)地不同年齡的三株解析木的胸徑、樹高及材積的調(diào)查數(shù)據(jù)，選取11種生長經(jīng)驗(yàn)方程對額濟(jì)納胡楊林的生長規(guī)律和生長模型進(jìn)行了研究。根據(jù)相關(guān)指數(shù)(R2)最大以及剩余殘差平方和(SSe)最小的原則，選取最優(yōu)的模擬方程，模擬出額濟(jì)納地區(qū)天然胡楊樹高、胸徑及材積與年齡的最優(yōu)生長經(jīng)驗(yàn)方程。3株解析木的胸徑擬合最優(yōu)方程是吉田正男方程，分別為：y=14．844／(1+965．867t。3·蝻)+O．815、y=O．968／(1+4．06X103t喝‘姻)+1．327、y--8．374／(1+3．44×103t咀酗)+0．3
2、69：樹高擬合最優(yōu)方程是柯列爾方程，分別為y=1．467t仉翩e吼吧‘、y=O．815t¨∞e-O．069‘、y-1．358t0’6船e噸0““；材積擬合最優(yōu)方程分別為混合型方程y=O．815t¨％e-O．帆、修正Weibull方程Y=O．038(1一e-O．OOlt3“)、混合型方程y=l／(-158．93+2．10×10qt．1瑚5)。并運(yùn)用X2檢驗(yàn)法來檢驗(yàn)所選方程，結(jié)果表明，預(yù)測值與實(shí)測值的差異性不顯著。在此基礎(chǔ)上探討了額濟(jì)納胡楊的生長狀況，結(jié)果表明胡楊生長具有明顯的階段性。關(guān)鍵詞：胡楊；直徑：樹高；材積；生長過程：生
3、長模型StudiesonthegrowingprocessofPopuluseuphraticaOliver●1一●●mEllna^bstractInthispaper，westudiedthegrowthpattemandthegrowthmodelofPopuluseuphraticaOliverinEjinabyusing1growthexperienceequation，whichalsousedthediameter、heightandvolumeofthethreetimberinthesamestandardg
4、roundandinthedifferentagegroups．Accordingtotheprincipleofrelevantindex(R2)Maximumandthesumofsquares(SSe)ofresidualtheminimumtwofactors，selectthebestsimulationequationstosimulateanEjinaareaofnaturalPopuluseuphraticaOliverheight，diameterandvolumegrowthofage—optimalem
5、piricalequation．ItisbestfittedtheequationofDBH．whichwasrepresentedtheMasaoYoshidaequationy=0．968／(1+4．06x103f3·629)+1．327，MasaoYoshidaequationy=0．968／(1+4．06x103t。3·629)+1．327，MasaoYoshidaequationy=8．374／(1+3．44x103t。朋)+O．369：treeheightequationswel'ethebestfittedRo
6、J甥cpequationy=1．467to’68e’0-02l，Roa疊cpequationy--O．815t1．136一。069tandRonzcpequationy=1．358to·622e-o·024t，volumeequationswerefittedbestmixedequationy=l／(13．596+1．218×105t’3·478)，amendedWeibullequationY=0．038(1一e卸·∞1f3心)，mixedequationy=l／(．158．93+2．10x10-3t-1-285)．An
7、dbyusingthex2testmethodtotesttheselectedequation，theresultsshowedthatitWasnotsignificantbetweenthedifferencevaluesofpredictedandmeasured．Onthisbasis，wediscussedthesituationofPopuluseuphraticaOliverinEjina,theresultsshowedthatthegrowthofPopuluseuphraticaOliverhaveob
8、viousstages．‘KeyWords：PopuluseuphratieaOliver；Diameter；Treeheight；Volume；Growingprocess；GrowingmodelDirectedby：Prof．ZHANGMingTieAppIicantforMaste
