兴安落叶松树干液流与太阳辐射的时滞效应  

Time Lag Effect between Stem Sap Flow and Solar Radiation in Larch

作　　者：田原 张秋良[1] 刘璇[1] 张永亮 Tian Yuan;Zhang Qiuliang;Liu Xuan;Zhang Yongliang(Inner Mongolia Agricultural University, Hohhot 010020, P. R. China;Inner Mongolia Greater Khingan Ecological Station of Forest)

机构地区：[1]内蒙古农业大学,呼和浩特010020 [2]内蒙古大兴安岭森林生态系统国家野外观测研究站

出　　处：《东北林业大学学报》2018年第5期23-26,共4页Journal of Northeast Forestry University

基　　金："十三五"国家重点研发计划(2017YFC0504003)

摘　　要：为了系统研究大兴安岭地区兴安落叶松树干液流与太阳辐射的时滞效应,采用热扩散技术测定树干液流,使用自动气象仪器测定辐射因子,利用逐行错位分析及相关分析法,分析兴安落叶松树干液流日变化和时期变化对总辐射(GR)、净辐射(Rn)、光合有效辐射(PAR)的时滞效应。结果表明:树干液流日变化对GR、Rn、PAR的响应不是同步进行,响应存在140~150 min的时滞,时滞效应显著;树干液流与Rn的相关性最好(R2=0.465)、时滞最短(滞后140 min);生长季树干液流量变化与GR的相关性高于Rn、PAR,树干液流与GR、Rn、PAR的时滞性的相关性不显著;树干液流对Rn的响应存在时滞,树干液流量时期变化与太阳辐射的时滞效应的相关性不显著。In order to systematically study the time lag effect of daily and period between stem sap flow and solar radiation including general radiation（ GR）,net radiation（ Rn） and photosynthetic active radiation（ PAR） in Larch forest of the Greater Khingan Mountains,we analyzed the data which include stem sap flow based on the measurement of the technology of thermal dissipation and radiation factors measured by the instrumentation of automatic meteorological station based on the crosscorrelation and correlation analysis. It was not synchronous to the daily change of stem sap flow and solar radiation which include GR,Rn and PAR,which had a significant lag effect for about 140-50 min in response. Stem sap flow had the best correlation（ R2= 0.465） and the minimum time delay（ lagged for 140 min） with Rn in the daily change. The correlation of stem sap flow and solar radiation indicated that GR had a higher correlation than Rn or PAR,and the time lag of them was not significant in period change of growth season. There was a time lag effect between stem sap flow and Rn in daily change,and there was not a significant time lag effect between stem sap flow and solar radiation in period change.

关 键 词：树干液流 热扩散法 太阳辐射 时滞效应 兴安落叶松 

分 类 号：S715.2[农业科学—林学]