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时间:2020-06-06
《陕北黄土高原刺槐植物功能性状与气象因子的关系.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、第2O卷第3期水土保持研究Vol_20,No.32013年6月ResearchofSoi1andWaterConservationJun.,2O13陕北黄土高原刺槐植物功能性状与气象因子的关系宋光,温仲明,郑颖,丁曼(1.西北农林科技大学资源环境学院,陕西杨凌712100;2.西北农林科技大学水土保持研究所,陕西杨凌712100)摘要:为阐明刺槐植物功能性状在黄土高原不同环境下的变异规律,探明刺槐对黄土高原环境的适应策略,对陕西省境内从中部向北的14个县(市、区)的刺槐植物功能性状进行测定与统计分析。研究了不同生境刺槐植物功能性状的种内差异
2、、刺槐功能性状间的相关关系及气象因子对刺槐植物功能性状的影响。结果表明:(1)除叶氮含量(LNC)、根组织密度(RTD)和根氮含量(RNC)在各采样点之间的差异不显著之外,其他8个性状在各采样点之间均表现出显著的差异(P3、象因子对刺槐植物功能性状的影响是不同的,对刺槐植物功能性状影响最大的气象因子是年均降水量(MAP)、年均温度(MAT)和年日照时数(ASR)。关键词:植物功能性状;刺槐;黄土高原;气象因子;适应策略中图分类号:S718.5文献标识码:A文童编号:1005—3409(2Oi3)030l25-06RelationshipsbetweenPlantFunctionalTraitsofRobiniaPseudoacaciaandMeteorologicalFactorsinLoessPlateau,NorthShaanxi,ChinaSONGGua4、ng,WENZhong—ming,ZHENGYing,DINGMan(1.CollegeofNaturalResourcesandEnvironment,NorthwestA&FUniversity,Yangling,ShaanJ'i712100,China;2.InstituteofSoilandWaterConservation,NorthwestA&FUniversity,Yangling,Shaanxi712100,China)Abstract:Toelucidatethevariationinplantfunctionaltrai5、tsandadaptivestrategiesofRobiniaPseudoacaciaontheLoessPlateau,wemeasured10plantfunctionaltraitsofRobiniaPseudoacaciain14countiesalongthemiddleareatothenorthofShaanxiprovince,andanalyzedtherelationshipsamongthesefunctionaltraitsalongenvironmentalgradients.Theresultsshowedth6、atleafnitrogencontent(LNC)androotnitrogencon—tent(RNC)havenosignificantdifferencesamong14samplingpoints,whileother8plantfunctionaltraitsshowedsignificantdifferencesamongsamplingpoints(P<0.05).Specificleafarea(SIA),leafthickness(LT),leaftissuedensity(LTD)andspecificrootleng7、th(SRL)havesignificantnegativecorrelations,androottissuedensity(RTD)andspecificrootlength(SRL)hastheremarkablenegativecorrelation.Differentenviromentalfactorshaddifferentimpactonplantfunctionaltraits.Itshowedthatmeanannualprecipitationhasthegreatestimpactonplantfunctionalt8、raitsofRobiniapseudoacacia,andfollowedbymeanannualtem—peratureandannualsunlightratioaccor
3、象因子对刺槐植物功能性状的影响是不同的,对刺槐植物功能性状影响最大的气象因子是年均降水量(MAP)、年均温度(MAT)和年日照时数(ASR)。关键词:植物功能性状;刺槐;黄土高原;气象因子;适应策略中图分类号:S718.5文献标识码:A文童编号:1005—3409(2Oi3)030l25-06RelationshipsbetweenPlantFunctionalTraitsofRobiniaPseudoacaciaandMeteorologicalFactorsinLoessPlateau,NorthShaanxi,ChinaSONGGua
4、ng,WENZhong—ming,ZHENGYing,DINGMan(1.CollegeofNaturalResourcesandEnvironment,NorthwestA&FUniversity,Yangling,ShaanJ'i712100,China;2.InstituteofSoilandWaterConservation,NorthwestA&FUniversity,Yangling,Shaanxi712100,China)Abstract:Toelucidatethevariationinplantfunctionaltrai
5、tsandadaptivestrategiesofRobiniaPseudoacaciaontheLoessPlateau,wemeasured10plantfunctionaltraitsofRobiniaPseudoacaciain14countiesalongthemiddleareatothenorthofShaanxiprovince,andanalyzedtherelationshipsamongthesefunctionaltraitsalongenvironmentalgradients.Theresultsshowedth
6、atleafnitrogencontent(LNC)androotnitrogencon—tent(RNC)havenosignificantdifferencesamong14samplingpoints,whileother8plantfunctionaltraitsshowedsignificantdifferencesamongsamplingpoints(P<0.05).Specificleafarea(SIA),leafthickness(LT),leaftissuedensity(LTD)andspecificrootleng
7、th(SRL)havesignificantnegativecorrelations,androottissuedensity(RTD)andspecificrootlength(SRL)hastheremarkablenegativecorrelation.Differentenviromentalfactorshaddifferentimpactonplantfunctionaltraits.Itshowedthatmeanannualprecipitationhasthegreatestimpactonplantfunctionalt
8、raitsofRobiniapseudoacacia,andfollowedbymeanannualtem—peratureandannualsunlightratioaccor
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