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1、維普資訊http://www.cqvip.com應(yīng)用與環(huán)境生物學(xué)報(bào)2003,9(5):455—459Ch/nJf曲朋Biol=ISSN1006-687X2003.10-25杉木人工林不同經(jīng)營(yíng)模式樹冠的分形特征書封磊洪偉吳承禎“王新功程煜廖成章范海蘭(福建農(nóng)林大學(xué)資源與環(huán)境學(xué)院福州350002;福建農(nóng)林大學(xué)林學(xué)院福建南平353001)摘要對(duì)杉木純林、杉木擬赤楊混交林、杉木觀光木混交林的不同樹種冠幅的分形維數(shù)進(jìn)行計(jì)算和比較.結(jié)果表明:杉木觀光木混交林中杉木種群冠幅分形維數(shù)>杉木擬赤楊混交林中杉木種群冠幅分形維數(shù)>杉木純林冠幅分形維數(shù);杉木觀光木混交林中觀光木種群冠幅分形維數(shù)>杉木
2、擬赤楊混交林中擬赤楊種群冠幅分形維數(shù).說明杉木混交林種間競(jìng)爭(zhēng)小,而杉木種內(nèi)競(jìng)爭(zhēng)激烈,同時(shí)杉木同觀光木之間的種間競(jìng)爭(zhēng)小于杉木同擬赤楊之間的種間競(jìng)爭(zhēng).圖4表2參l6關(guān)鍵詞分形維數(shù);冠幅;杉木;改進(jìn)單純形法CLCS718.542FRACTALFEATURESoFCRoWNBREATHoFDⅡERENTTREESINDⅡERENTIANAGEMENTSoFCHINESEFⅡPLANTATIoNFENGLei,HONGWei,WUChengzhen一,WANGXingong,CHENGYu,LIAOChengzhang&FANHailan(CollegeofResouwesandEnv
3、ironment,F(xiàn)ujianAgricultureandForestryUnivisity,F(xiàn)uzhou350002,China)(ForestryCollege。FujianAgricultureandForestryUniversity,Nanping,F(xiàn)ujian353001,China)AbstractStudyonspatialdistributionofplantpopulationwitlldiferentcrownbreathCallsiretheinformationforthem~cha-nismofpopulationdistrbution.Fract
4、algeometryofcrownisconsideredtobeaveryusefultoolfordealingwiththedistributionofcrown.Inthispaper。thefractaldimensionofdiferentspeciescrowninthepureChinesefirplantation,theChinesefirplan—tationmixedwitllAlniphyUumfortumeiandtheonewitllTsoongiodenronodorumwerecalculatedandcompared.Theresultsi
5、n—dicatedthatthefractaldimensionofChinesefirwhichmixedwithTsoongiodenronodorumWS.Slargerthantheothers;thefractaldimensionoftheChinesefirmixedplantationwithAlniphyllumfortum~arclargerthanthatofthepureChinesefirplantation;thefractaldimensionofTsoong/odenronodorumwaslargerthanthatofAlniphyllum
6、,0wne.Theseshowedthattheinterspocificcompetitionofvariablepopulationswasnotintense,buttheintraspecificcompetitionWflSveryintense.Fig4,2,Ref16Keywordsfractaldimension;canopy;Cunninghamialanceolata(Lamb.)Hook;med~edsimplexmethodCLCs718.542分形(fracta1)一詞是用來描述一些非常不規(guī)則以至不適依賴的影響.冠幅的分形維數(shù)作為表征植物種群空間占據(jù)
7、宜視為經(jīng)典幾何研究的對(duì)象,試圖透過混亂現(xiàn)象和不規(guī)則構(gòu)型能力的工具,是種群動(dòng)態(tài)分析和種群分布格局研究的重要指標(biāo)揭示隱藏于現(xiàn)象背后的局部與整體的本質(zhì)聯(lián)系和運(yùn)動(dòng)規(guī)之一¨.杉木(Cunninghamialanceolata(Lamb.)Hook]作為我律?.從B.B.Mandelbort(1967)提出該理論以來,分形理論已國(guó)南方最重要的速生優(yōu)良用材樹種,由于其生長(zhǎng)快、輪伐期短、廣泛應(yīng)用于自然科學(xué)、社會(huì)科學(xué)中,成為研究無特征尺度卻有自肥能力差,加上目前不合理的栽培制度,導(dǎo)致一系列生態(tài)問著自相似性質(zhì)的體系強(qiáng)有力的