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时间:2020-06-06
《麻栎人工林生长规律模拟与研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、西北林学院学报2014,29(4):145~i50JournalofNorthwestForestryUniversitydoi:10.3969/j.issn.1001—7461.2014.04.26麻栎人工林生长规律模拟与研究魏国余,覃德文,孙灿岳,秦武明,阳纯。(1.广西高峰林场,广西南宁530031;2.广西大学林学院,广西南宁530005)摘要:以广西良凤江国家森林公园27年生麻栎人工林为对象,采用树干解析的方法对麻栎人工林测树因子各年间变化动态进行检测,研究树高(H)、胸径(D)、材积(V)与树
2、龄(T)间的回归关系。结果表明,麻栎人工林树高和胸径的平均生长量曲线和连年生长量曲线出现了多个交叉点,变化幅度较大,但其单株材积生长曲线27a间处于不断攀升,表现出良好的生长趋势,且各生长曲线表明麻栎的生长在0"-~4a为速生期;所拟合回归模型R均达到0.9以上,检验精度较高,其中树高和胸径最优生长模型均为Kof方程,单株材积最优生长模型为坎派兹模型。得出麻栎人工林在27a保持稳定的增长趋势,造林前期生长迅速,材积生长尚未达到数量成熟,仍有生长趋势。拟合模型精度较高,可运用于生产实践中。关键词:麻栎;人工
3、林;生长量曲线;最优生长模型中图分类号:$792.16文献标志码:A文章编号:1001—7461(2014)04—0145—06SimulationandResearchontheGrowthRegularityofQuercusacutissimaPlantationWEIGuo-yu,QINDe-wen孙,SUNCan—yue,QINWu-ming,YANGChun(1.GuangxiGaofengForestFarm,Nanning,Guangxi530031,China;2.ForestryCol
4、lege,GuangxiUniversity,Nanning,Guangxi530005,China)Abstract:InvestigationwasconductedonthegrowthregularityofQuercusacutissimaina27一year—oldplan—tationlocatedinLiangfen鲥iangNationalForestPark,Guangxi,China.Stemanalysismethodwasadoptedtoexaminethedynamiccha
5、ngesofdifferentvariables,suchastreeheight(H),diameteratbreastheight(DBH),volume,andage(T).Linearregressionalmodelwasadoptedtoexaminetherelationshipsamongvariables.Theresultsshowedthatsevera1crosswerepointspresentedinthecurvesofaverageandSucces—sivegrowtho
6、fHandDBH,andwidevariationswereobserved.However,theindividualtreevolumegrowthcurveexhibitedarisingtrendduring27a,showinggoodgrowingpotentia1.Thegrowthcurvesofdifferentvariablesdemonstratedthatthefirst4yearswerethefastgrowingperiods.ThevaluesofRofthesimulat
7、edmodelswereover0.9withhightestprecision.HandDBHgrowthmodelswereoptimalKorfequation,andtheoptimalmodelofindividualtreevolumegrowthwasKanpaiziequation.Itwascon—eludedthatQ.acutissimaplantationsintheforestparkmaintainedasteadygrowthtrendin27years,thetreesgr
8、ewrapidlyintheirinitialstage.Thevolumegrowthhadnotreacheditsfullmaturestage,growthpotentialstillexisted.Thefittingmodelshadhighprecision,andtheycouldbeappliedtothepracticalpro—duction.Keywords:Quercusacutissima;plan
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