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时间:2020-06-03
《黄河三角洲刺槐人工林风害成因.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、应用生态学报2012年8月第23卷第8期ChineseJournalofAppliedEcology,Aug.2012,23(8):2049—2054黄河三角洲刺槐人工林风害成因米曹帮华张玉娟毛培利李成波(山东农业大学农业生态与环境重点实验室,山东泰安271018;中国科学院烟台海岸带研究所山东省海岸带环境过程重点实验室,山东烟台264003;山东黄河三角洲国家级自然保护区大汶流管理站,山东东营257509)摘要在调查2010年6__7月大风对黄河三角洲地区人工刺槐林的影响基础上,测定了风倒木形态指标、根系特征及其
2、所处林窗的赶小和土壤紧实度,分析滨海盐碱地人Z-*0槐林风倒的成因.结果表明:风倒是刺槐林遭受风害的主要形式,以胸径15~20cm的树木受害最严重.随着径级的增加,风倒木的树高、冠幅、冠高和尖削度显著增加,而枝下高、冠幅/冠高和枝下高/树高变化不显著;根系长度先迅速增加而后增加缓慢,根系质量逐渐增加.随林窗面积增加,倒木株数先增加后下降,100~150in林窗倒木株数最多.土壤紧实度随土壤深度增加而增加,而随样木径级增加变化不显著.随径级增加,树形因子增大、根系生长受抑是刺槐风倒的重要原因,而林窗起到了促进作用.关
3、键词风倒树形根系林窗文章编号1001—9332(2012)08—2049—06中图分类号s718文献标识码AFormationcausesofwinddamagetoRobiniapseudoacaciaplantationinYellowRiverDelta.CAOBang—hua,ZHANGYu—juan,MAOPei—li,LICheng—bo。(KeyLaboratoryofAgriculturalEcologyandEnvironment,ShandongAgricuhuralUniversity,’an
4、271018,Shandong,China;ShandongProvinceKeyLaboratoryofCoastalZoneEnvironmentalProcesses.YantaiInstituteofCoastalZoneResearch,ineseAcademyofSciences,ynnta264003,Shandong,ina;DawenliuStationofYellowRiverDeltaNationalNatureProtectionZone。Dongying257509,an.如,China)
5、.一App1.Eco1.,2012,23(8):2049—2054.Abstract:Basedontheinvestigationofthegale.causeddamagetotheRobiniapseudoacaciaplanta.tionifltheYellowRiverDeltainJune—July2010.thispapermeasuredthemorphologicalindexesandrootsystemcharacteristicsoffallentrees.,gapsizes,andsoil
6、compactness,aimedtoanalyzetheformationcausesofthewinddamagetotheplantation.Wind—fallingwasthemainformofthewinddamagetotheR.pseudoacaciaplantation.andthedamagewasmoreseriOUSforthetreeswiththediameteratbreastheightof15—20cm.Forthefallentrees,theirtreeheightandth
7、eircrownwidth.height,andtaperdegreeincreasedsignificantlywiththeincreaseofthediameteratbreastheight,whiletheheightunderbranch,theratioofcrownwidthtoheight,andtheratiooftheheightunderbranchtotreeheightshowednosignificantchange.Withtheincreaseofdiameterclass.roo
8、tlengthhadarapidincreasefirstbutaslowinereasethen.whilerootmassincreasedgraduaUv.Within.creasingforestgaparea,thenumberoffallentreesdecreasedafteraninitialincrease.beingthemaximumi
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