globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6495475
论文题名:
鹅掌楸树木直径动态变化及其对气象因子的响应
其他题名: Stem Diameter Variation of Liriodendron chinense and Its Response to Climatic Factors
作者: 张宝玉; 叶兰芝; 陈爱军; 胡佳成; 李东升
刊名: 东北林业大学学报
ISSN: 1000-5382
出版年: 2019
卷: 47, 期:5, 页码:52-57
语种: 中文
中文关键词: 气象因子 ; 径生长量 ; 树木直径-气候学模型 ; 时滞现象
英文关键词: Climatic factors ; Stem diameter variation ; Stem diameter-climate model ; Time lag
WOS学科分类: PLANT SCIENCES
WOS研究方向: Plant Sciences
中文摘要: 为了探讨鹅掌楸(Liriodendron chinense)径生长量对气象因子的响应,以及树木直径生长的变化规律,运用差动电动传感器(3210801,TESA,瑞士),对鹅掌楸不同部位的直径生长量进行连续监测。结果表明:(1)在不同天气状态下,树木直径有两种典型的动态变化模式。天气降水时,树木直径持续扩张;天气晴朗时,树木直径明显经历收缩、恢复、扩张的过程。(2)树木直径日波动量在不同部位、不同季节显著差异。夏季树木直径收缩启动时间早于冬季,树干上部的直径日变幅最大,变化幅度-50~ 400 mum,树干基部最小,变化幅度-120~ 200 mum;冬季不同部位的树木直径日变幅趋势相近,变化幅度-30~ 30 mum;不同部位的树木直径日变化存在时滞现象,时滞范围0~ 75 min,且测量点越低滞后越明显;不同季节,树木直径日变化时滞现象的主导因素不同。(3)树木直径波动量与气象因子显著相关,且滞后于气象因子,树木直径-气候学关系的多元回归分析模型显示,其对树木直径实测值的解释率为84.9%,考虑时滞现象后修正模型的模拟精度提高到90.3%。
英文摘要: The dynamic measurement of the diameter of trees was continuously monitored in different parts of Liriodendron chinense by differential electric sensor (3210801,TESA,Switzerland),the response of the meteorological factors was discussed, and the variation rule of tree diameter was analyzed deeply. The results indicated that there were two typical patterns of stem diameter variation (SDV) in different weather conditions,SDV continued expansion on rainy days,while three distinct phases of SDV on sunny days were shrinkage,recovery,expansion,respectively. In general,there were significant differences in diurnal and seasonal variations of SDV. During the measurement,in summer,the contraction of stem diameter started earlier than in winter. The trunk top was maximum about -50-400 mum and the first-order branch was minimum about -120-200 mum. But the amplitude of daily diameter fluctuations was similar in winter,both in -30-30 mum. Stem diameter measurements at the different heights had time lags varying from 0 to 75 min,measurements at the lower heights lagging behind the most obviously. The dominant factors of time lag in different seasons were different. In addition, SDV was strongly associated with the climatic factors,particularly,relative humidity and air temperature,and may lag behind the climatic factors. A model applying multiple regression analysis built with data that included relative humidity,air temperature and vapor pressure deficit explained 84.9% of the variance in SDV. The use of lagged climatic variables increased the proportion of the variance explained (R2 = 0.903) .
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/157918
Appears in Collections:气候变化事实与影响

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作者单位: 中国计量大学, 杭州, 浙江 310018, 中国

Recommended Citation:
张宝玉,叶兰芝,陈爱军,等. 鹅掌楸树木直径动态变化及其对气象因子的响应[J]. 东北林业大学学报,2019-01-01,47(5):52-57
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