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时间:2020-04-25
《天目山柳杉叶水势日变化及其与空气温湿度和 PAR 的相关性-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、植物资源与环境学报2014,23(1):39—43JournalofPlantResourcesandEnvironment天目山柳杉叶水势日变化及其与空气温湿度和PAR的相关性秦登,刘鹤,赵明水,蒋文伟,①(1.浙江农林大学园林学院,浙江『临安311300;2.浙江天目山国家级自然保护区管理局,浙江临安311311)摘要:对天目山不同海拔(1067、698和419m)样点柳杉(Cryptomeriafortu~iHooibrenkexOttoetDietr.)不同冠层(分别离地面高1.3、4和8n1)的叶水势日变化特征进
2、行了研究,并对柳杉叶水势与空气温度、空气相对湿度及光合有效辐射(PAR)的相关性进行了分析。结果表明:不同海拔样点柳杉不同冠层叶水势日变化曲线均呈典型的“v”型,但谷值及其出现的时间有差异;随树冠高度增加叶水势日均值均逐渐降低;不同海拔柳杉同一冠层叶水势日均值有明显差异,其中,海拔419m处柳杉叶水势日均值为一1.1l—一1.22MPa,海拔698和1067nl处柳杉叶水势日均值为一0.78—一0.98MPa,差异极显著(P<0.01)。相关性分析结果表明:柳杉叶水势与空气相对湿度均呈显著正相关(P3、和光合有效辐射均呈负相关。逐步回归分析结果表明:在海拔419m处影响柳杉叶水势日变化的主导因子是空气温度,而在海拔l067和698m处影响柳杉叶水势日变化的主导因子是空气相对湿度。研究结果显示:随海拔升高柳杉叶水势增大且导致叶水势变化的主导因子也有所改变。关键词:柳杉;叶水势;海拔;天目山;气候因子;相关性中图分类号:Q945.171;Q948.11文献标志码:A文章编号:1674—7895(2014)O1—0039一O5DOI:10.3969/j.issn.1674-7895.2014.O1.06Diurnalchang4、eofleafwaterpotentialofCryptomeriafortuneianditscorrelationwithairtemperature,humidityandphotosyntheticaⅡyactiveradiation(PAR)inTianmuMountainQINDeng,LIUHe,ZHAOMingshui,JIANGWenwei,①(1.SchoolofLandscapeArchitecture,ZhejiangA&FUniversity,Lin’an311300,China;2.Manage5、mentOffice,NationalNatureReserveofMountTianmuinZhejiang,Lin’an311311,China),PlantResour.&Environ.2014,23(1):39—43Abstract:Diurnalchangecharacteristicsofleafwaterpotentialindifferentcrownlayers(heightofthegroundof1.3、4and8m,respectively)ofCryptomeriafortuneiHooibre6、nkexOttoetDietr.atsamplingplotswithaltitudes1067.698and419minTianmuMountainwereresearched,andalso,correlationofleafwaterpotentialwithairtemperature.airrelativehumidityandphotosyntheticallyactiveradiationfPAR)wasanalyzed.Resuhsshowthatdiurnalchangecurveofleafwaterp7、otentialindifferentcrown1ayersofC.fortuneatsamplingplotswithdifferentaltitudesallaretypical“V”type.buttherearecertaindifferencesinvalleyvalueanditsaDpearancetime.Dailyaveragevalueofleafwaterpotentialgraduallyreduceswithincreasingofcrownheight.withobviousdifference8、insamecrownlayeratsamplingplotswithdifferentaltitudes.Inwhich,dailyaveragevalueofleafwaterpotentialataltitude419misfrom一1.11MPat0—1.22MPaandthatataltitu
3、和光合有效辐射均呈负相关。逐步回归分析结果表明:在海拔419m处影响柳杉叶水势日变化的主导因子是空气温度,而在海拔l067和698m处影响柳杉叶水势日变化的主导因子是空气相对湿度。研究结果显示:随海拔升高柳杉叶水势增大且导致叶水势变化的主导因子也有所改变。关键词:柳杉;叶水势;海拔;天目山;气候因子;相关性中图分类号:Q945.171;Q948.11文献标志码:A文章编号:1674—7895(2014)O1—0039一O5DOI:10.3969/j.issn.1674-7895.2014.O1.06Diurnalchang
4、eofleafwaterpotentialofCryptomeriafortuneianditscorrelationwithairtemperature,humidityandphotosyntheticaⅡyactiveradiation(PAR)inTianmuMountainQINDeng,LIUHe,ZHAOMingshui,JIANGWenwei,①(1.SchoolofLandscapeArchitecture,ZhejiangA&FUniversity,Lin’an311300,China;2.Manage
5、mentOffice,NationalNatureReserveofMountTianmuinZhejiang,Lin’an311311,China),PlantResour.&Environ.2014,23(1):39—43Abstract:Diurnalchangecharacteristicsofleafwaterpotentialindifferentcrownlayers(heightofthegroundof1.3、4and8m,respectively)ofCryptomeriafortuneiHooibre
6、nkexOttoetDietr.atsamplingplotswithaltitudes1067.698and419minTianmuMountainwereresearched,andalso,correlationofleafwaterpotentialwithairtemperature.airrelativehumidityandphotosyntheticallyactiveradiationfPAR)wasanalyzed.Resuhsshowthatdiurnalchangecurveofleafwaterp
7、otentialindifferentcrown1ayersofC.fortuneatsamplingplotswithdifferentaltitudesallaretypical“V”type.buttherearecertaindifferencesinvalleyvalueanditsaDpearancetime.Dailyaveragevalueofleafwaterpotentialgraduallyreduceswithincreasingofcrownheight.withobviousdifference
8、insamecrownlayeratsamplingplotswithdifferentaltitudes.Inwhich,dailyaveragevalueofleafwaterpotentialataltitude419misfrom一1.11MPat0—1.22MPaandthatataltitu
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