太行山区不同植被降雨再分配特征 -pg电子娱乐平台

doi:10.12357/cjea.20220980太行山区不同植被降雨再分配特征[j].中国生态农业学报(中英文),2023,31(9):14711481sunrainfallredistributiondifferentvegetationstaihangmountain,china[j].chinesejournaleco-agriculture,2023,31(9):14711481太行山区不同植被降雨再分配特征植被林冠层降雨再分配是森林生态系统重要的水文过程,其研究对进一步探索太行山植被林冠层的水文效揭示森林生态系统水源涵养功能具有重要意义。选取位于中国科学院太行山山地生态试验站自然荆条灌丛以及人工刺槐林、白皮松林、黄连木林、樱桃林、杜仲林、白蜡林、竹林为研究对象,于20222022年雨季次降雨量波动性较大,降雨时间分布不均主要集中在7总穿透雨量占总降雨量的比例均超过60%;总树干径流量占总降雨量的比例最大的为杜仲林(13.94%),次为竹林(6.78%),其余树种总树干径流量所占比例均低于5%;总冠层截留量占总降雨量的比例,白蜡林最大(32.97%),白皮松林最小(7.53%),整体上表现为穿透雨量冠层截留量树干径流量。3)穿透雨量、树干径流量与林外降雨量呈一元线性函数关系,冠层截留量与林外降雨量呈幂函数关系,穿透雨率和树干径流率与林外降雨量呈对数函数关系(单调增函数);冠层截留率与林外降雨量呈对数函数关系(单调减函数)。降雨再分配特征受降雨量及叶片吸水能力影响较大。因此,合理选择林分类型,调整不同林分比例可减少冠层截留量,提高降水利用效率。关键词:太行山区;降雨再分配;穿透雨;树干径流;冠层截留;叶片吸水能力中图分类号:s157.2开放科学码(资源服务)标识码(osid):rainfallredistributiondifferentvegetationstaihangmountain,chinasuntianmiao1,2yanghuicaojianshengagriculturalresourcesresearch,institutedevelopmentalbiology,chineseacademykeylabor-atoryagriculturalwaterresources,chineseacademysciences,shijiazhuang050022,china;chineseacademysciences,beijing100049,china)abstract:ecologicalrestorationprojects,vegetationcovertaihangmountainshasincreased,currentsituationwatershortageshasstillbeeneffectivelyimproved.increasedvegetationhydrologicalprocessesfirstactionlayerrainfallreachesterrestrialecosystem,vegetationcanopydividesrainfallthroughfall,stemflow,canopyinterception.spatialdistributionrainfall.therefore,studyingrainfallredis-tributionprocessesrelationshipbetweenvegetationstudyselectedeighttypicalforests,naturalvitexnegundo,artificialfroestsrobiniapseudoacacia,pinusbungeana,pistaciachinensis,eucommiaulmoides,河北省自然科学基金创新研究群体项目(d2021503001)、科技基础资源调查专项(2022fy100104)、河北省创新能力提升计划项目(20536001d)和河北省重点研发计划项目(20324201d)资助主要从事山地生态水文过程与降水资源调控机制研究。e-mail:caojs@sjziam.ac.cn主要研究方向为生态水文学。e-mail:stm15254173360@163.com收稿日期:2022-12-20　接受日期:2023-04-21naturalsciencefoundationhebeiprovince(d2021503001),specialinvestigationprojecttechnologicalbasicresourceschina(2022fy100104),innovationcapabilityenhancementplanprojecthebeiprovince(20536001d),keyresearchdevelopmentplanprojectshebeiprovince(20324201d).correspondingauthor,e-mail:caojs@sjziam.ac.cnreceiveddec.20,2022;acceptedapr.21,2023中国生态农业学报(中英文)　2023chinesejournalofeco-agriculture,sep.2023,31(9):14711481http://www.ecoagri.ac.cncerasuspseudocerasus,fraxinuschinensis,garciniamultiflora.fieldmonitoringindoorexperimentswereconductedex-plorerainfallredistributioncharacteristicsdifferentforeststandstaihangmountains.studywerefol-lows:studyyear(2022),rainfallamount480.0mm,rainfallrainyseason283.25mm,rainfalleventsrainyseasonaverageamountperrainfall14.16mm,variationrangerainfallintensity0.050.72mmhmainlyconsistingrainfalleventslessthanrainyseason2022fluctu-atedgreatly,unevendistributionrainfalltimemainlyconcentratedtotalthroughfalltotalrainfall greaterthan 60%. lowestthreshold rainfallamount among eight vegetations producingthroughfall 0.77mm; ulmoidesforest has largestproportion totalstemflow totalrainfall, 13.94%,fol- lowed multifloraforest (6.78%), totalstemflow remainingspecies lessthan 5%. lowestthreshold rainfallamount eightvegetations producingstemflow 3.35mm; totalcanopy interception totalrainfall chinensisforest, accounting bungeanaforest, accounting overallperformance follows:throughfallcanopy interceptionstem flow. throughfall,stemflow, canopyinterception increased significantly rainfall.throughfall rate, stemflow rate, funnelingratio increased rapidly leveledoff increasingrainfall amount. canopyinterception rate decreased rapidly leveledoff increasingrain-