冀北山区华北落叶松人工林林分主要因子与其水源涵养功能关系分析

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1、effectonthefunctionofwaterconservationindexwasmoresignificant，it1Salinearpositivecorrelation．Intermsofsignificance，forcanopyinterceptionrate，crowndensityisgreaterthantheaveragetreeheight，theaveragetreeheightisgreaterthantheaveragediameteratbreastheight；forst

2、andthestaticholdingwatercapacity,theaveragetreeheightisgreaterthantheaveragediameteratbreastheight，theaveragediameteratbreastheightisgreaterthancrowndensity．(3)Standdensityandthestandstaticwater-holdingabilityhadnoobviouslinearrelationship，Alongwiththestandd

3、ensityincrease，Larixprincipis—rupprechtiiMayr．Litterlayerandsoillayercapacityshowedatrendoffirstincreasedafterdecreased．Whenthelitterlayerandsoillayerwater-holdingabilityachievesmaximum，thebestmanagementdensityofLarixprincipis-rupprechtiiMayr．plantationofdif

4、ferentforestage：20ais2500n／hm2，30ais1800n／hm2，40ais1000n／hm2，50ais800n／hm2．(4)Optimumdensityof20aLarixprincipis—rupprechtiiMayr．plantationis2500plants／ha，thedensitycanbeused鹊Larixprincipis-rupprechtiiMayr．plantationatthebeginningoftheplantingdensity．Larixpri

5、ncipis—rupprechtiiMayr．belongstolong-livedtreespecies，Inthestudyareaofsiteenvironmenttofosterwatersourceconservationforests，densityshouldbecontrolledin800～1000plantsperhectareinstandmaturestage．(5)Throughestablishingmodelofrelationshipbetweenequaltreeheight，

6、equaldiameter,maximaldensity,naturalthinningline，volumeandwatercontent，itcouldpreparetheWaterconservationfunctionofdifferentforeststanddensitycontroldiagram．ThewaterconservationfunctiondensitycontroldiagramofLarixprincipis·rupprechtiiMayr．isusedtoplantationf

7、orestProductionestimates，resourceinvestigation，forestthinningect，itisofgreatsignificancetotheproductionpracticeandregulatingthefunctionofwaterconservationforest，provideanewapproachforLarixprincipis·rupprechtiiMayr．plantationmanagement．Keywords：Northernhebeim

8、ountain；Larixprincipis—rupprechtiiMayr；Mainfactorstostand；Standdensity；Waterconservation目录弓l言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11研究综述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．31．1研究的目