江西省大岗山主要森林类型降雨再分配特征_李道宁 (1)VIP专享VIP免费

江西省大岗山主要森林类型降雨再分配特征*李道宁1摇王摇兵2摇蔡体久3**摇殷摇卓1摇琚存勇3(1东北林业大学生态研究中心,哈尔滨150040;2中国林业科学研究院森林生态与环境保护研究所,北京100091;3东北林业大学林学院,哈尔滨150040)摘摇要摇以江西大岗山地区杉木林、常绿阔叶林和毛竹林为研究对象,分析其对降水再分配过程的影响.结果表明:2012年4—6月,研究区降水量为531.6mm,以小到中雨为主,单次最大降雨量为61.7mm.研究期间,毛竹林总穿透雨量最大,常绿阔叶林最小.降水量相同条件下,毛竹林与杉木林的穿透雨量相差不大;降水量较大且相同时,常绿阔叶林的穿透雨量明显小于另两种林型;穿透雨在林内有明显的空间变异性.杉木林、常绿阔叶林和毛竹林的树干径流率分别为1.4%、8.9%和8.8%.杉木林树干径流与另两种林型差异极显著(P<0.01).3种林型树干径流量均与前期降水条件有关,毛竹林相关程度最小,杉木林最大.3种林型林冠截留量大小依次为杉木林(30.5%)>阔叶林(25.5%)>毛竹林(19.2%).在该地区常见降雨条件下(小雨),杉木林截留率明显高于另两种林型.关键词摇杉木林摇毛竹林摇常绿阔叶林摇穿透雨摇树干径流摇林冠截留文章编号摇1001-9332(2014)08-0000-04摇中图分类号摇S718.5摇文献标识码摇ARainfallredistributiontraitsofthreemainforesttypesinDagangshanMountainsofJiangxiProvince,China.LIDao鄄ning1,WANGBing2,CAITi鄄jiu3,YINZhuo1,JUCun鄄yong3(1Eco鄄logicalResearchCenter,NortheastForestryUniversity,Harbin150040,China;2InstituteofForestEcologyandEnvironmentalProtection,ChineseAcademyofForestry,Beijing100091,China;3CollegeofForestry,NortheastForestryUniversity,Harbin150040,China).鄄Chin.J.Appl.Ecol.,2014,25(8):-.Abstract:Theredistributionprocessesofrainfallduetothecanopywerestudiedonthreetypicalforesttypes(Chinesefirforest,evergreenbroad鄄leavedforestandPhyllostachyspubescensforest)inDagangshanMountainsofJiangxiProvince.TheresultsshowedthatfromApriltoJune,2012,thetotalprecipitationwas531.6mm,withthemaximumsinglerainfallof61.7mm.Therainfallinthisareawasmainlylightandmoderate.Duringtheresearchperiod,thetotalthroughfallofP.pu鄄bescensforestwasthegreatest,andthatofevergreenbroad鄄leavedforestwasthesmallest.ThethroughfallofP.pubescensandChinesefirforestwerealmostequalatthesamerainfallintensity.However,thethroughfallofevergreenbroad鄄leavedforestwasobservablysmallerthanthoseoftheothertwotypesofforestatthesamehighrainfallintensity.Throughfallpresentedadistinctspatialvariabilitywithineachforest.StemflowofChinesefirforest,evergreenbroad鄄leavedforestandP.pubescensforestwere1.4%,8.9%and8.8%,respectively.Thereweresignificantlydifferences(P<0.01)instemflowbetweentheChinesefirforestandtheothertwotypesofforests.Inaddi鄄tion,themoisturedegreeofforestsbeforearaineventgreatlyinfluencedthequantityofthestem鄄flow.TheeffectwasstrongestintheChinesefirplantationandweakestinthePpubescensforest.Theproportionofinterceptiontorainfallwasinadescendingorderof30.5%,25.5%and19.2%fortheChinesefirforest,theevergreenbroad鄄leavedforestandthePpubescensforest,respectively.TheChinesefirforesthadtheobviouslygreaterinterceptionratetheothertwotypesofforestsunderusualrainfallinthestudyarea.Keywords:Chinesefirforest;Phyllostachyspubescensforest;evergreenbroad鄄leavedforest;throughfall;stemflow;interception.*国家林业公益性行业科研专项(201104005鄄05)和东北林业大学学术名师支持计划项目资助.**通讯作者.E鄄mail:caitijiu1963@163.com2014鄄03鄄11收稿,2014鄄05鄄16接受.应用生态学报摇2014年8月摇第25卷摇第8期摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇ChineseJournalofAppliedEcology,Aug.2014,25(8):-网络出版时间：2014-05-...