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时间:2020-06-04
《开敞度调控对阔叶红松人工天然混交林上层阔叶树的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第50卷第2期林业科学Vo1.50.No.22014年2月SCIENTIASILVAESINICAEFeb.,2014doi:10.11707/j.1001—7488.20140204开敞度调控对阔叶红松人工天然、?昆交林上层阔叶树的影响沈海龙王龙林存学丛健杨文化张鹏张群范少辉(1.东北林业大学林学院哈尔滨150040;2.黑龙江省海林市林业局海林l57100;3.辽宁省林业厅外资项目办公室沈阳l10031;4.中国林业科学研究院林业研究所北京100091;5.国际竹藤网络中心北京100102)摘要:以阔叶红松人工天然混交林
2、为对象,以林下红松个体开敞度()为主要数量控制指标进行群落结构量化调整,研究调整后6年间上层阔叶树直径和树高生长及树种组成和物种多样性的变化。结果表明:量化调整明显促进了保留阔叶树的直径生长和树高生长,各处理累计的定期生长量均高于对照,且随调整时期延长差异不断加大;K=1.5和K=2.0水平的年生长量与对照林分的差异基本都达到显著水平;量化调整改善了上层阔叶树树种组成,水曲柳、黄檗和胡桃楸等珍贵阔叶树种比例上升,白桦和山杨等先锋树种比例下降;量化调整使阔叶树物种丰富度增加,物种多样性和均匀度增加或差别不大,生态优势度降低或差
3、别不大。关键词:次生林;上层阔叶树;开敞度调控;生长;物种多样性中图分类号:s718.55文献标识码:A文章编号:1001—7488(2Ol4)02—0022—09EfrectofCommunityStructureRegulationonUpper-LayerBroad-LeavedTreesinaMixedForestofPlantedKoreanPineandNaturally--regeneratedBroad-LeavedTreesShenHailongWangLong’LinCunxueCongJianYangW
4、enhuaZhangPeng‘ZhangQunFanShaohui(1.SchoolofForestry,NortheastForestryUniversityHarbinl50040;2.ForestryBureauofHailinCity.HeilongjiangProvinceHailin157100:3.ForeignCapitalPr~ectOdficeunderLiaoningProvincialForestryDepartmentShenyang11003l;4.ResearchInstituteofFores
5、try,CAFBeijing100091;5.InternationalCentreforBambooandRattanBeijing100102)Abstract:Inthispaper,thediameterandheightincrement,speciescompositionandspeciesdiversityoftheupper—layerbroad—leavedtreesweremeasuredduring6yearsperiodafterstandstructurequantitativeregulatio
6、nwithopeningdegreeoftheunder-canopyplantedP.koraiensisistreesinamixedforestofplantedPinuskoraienswithnaturalbroad—leavedtrees.Theresultsshowedthatthequantitativeregulationofstandstructure(QR)evidentlypromotedthediameterandheightincrementofupper—layerbroadleavedtree
7、s(UBT).PeriodicincrementofUBTinvariousQRtreatmentswasallhigherthanthatincontrolandtheincrementwasincreasedalongwiththeelongationofQRperiod.TheannualincrementofUBTinK=1.5andK=2.0treatmentswassignificantlyhigherthanthatincontro1.QRimprovedthespeciescompositionofUBTin
8、thetreatedplots,theproportionofvaluablehardwoodspecieslikeFraxinusmandshurica,PhellodendronamurenseandJuglansmandshuricawasincreased,andthepropor
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