西北林学院学报2013，Vol.28Issue(2)：8-14,7.DOI:10.3969/j.issn.1001-7461.2013.02.02
天目山柳杉树干液流春秋季特征及影响因素分析
Characteristics of Stem Sap Flow of Cryptomeria fortunei and Relevant Factor Analysis in Spring and Autumn at Mount Tianmu
摘要
Abstract
From March to May and September to November 2009, stem sap flow of Cryptomeria fortunei at Mount Tianmu was continuously monitored with thermal dissipation probe (TDP). Several environmental factors were also measured. Dynamic changes of the flow showed a single peak curve in sunny and cloudy days. However,the magnitude of the variation was not obvious in rainy days. In the sunny days in spring, the flow started to move at about 6:00,and reached its peak value at about 13:00. In spring,it started one hour earlier and acted longer than in autumn. The dynamic changes of the flow in cloudy days demonstrated similar patterns to those in sunny days,however,the starting time,the time to reach its peak value,and the time begun to decline were quite different. Significant correlations were observed between the flow rate and photosynthetic active radiation (PAR), temperature, relative humidity, and leaf humidity, while the relevance was poor with carbon dioxide concentration. Moreover, the relevance between the sap flow and the humidity of the leaf surface were different in different seasons. The regression equations between the flow of stem and environmental factors were established by using multiple statistics:Vs =-23. 785+0. 032PAR+9. 944Ta -1. 022Rh + 1. 263Lh(spring) ;Vs = 29. 635 + 0. 069PAR+4. 641Ta -0. 756Rh -1. 072Lh (autumn).关键词
柳杉/树干液流/春秋季/环境因子Key words
Cryptomeria fortunei/ stem sap flow/ spring and autumn/ environmental factor分类
农业科技引用本文复制引用
杨广远,张涛,戴锋,赵明水,蒋文伟..天目山柳杉树干液流春秋季特征及影响因素分析[J].西北林学院学报,2013,28(2):8-14,7.基金项目
国家自然科学基金项目(30972342). （30972342）
