[1]任世奇,邓紫宇,郭东强,等.尾巨桉液流密度动态及其影响因子分析[J].森林与环境学报,2016,36(01):1-7.[doi:10.13324/j.cnki.jfcf.2016.01.001]
 REN Shiqi,DENG Ziyu,GUO Dongqiang,et al.Dynamics of sap flow density of Eucalyptus urophylla×Eucalyptus grandis and relationship with environmental factors[J].,2016,36(01):1-7.[doi:10.13324/j.cnki.jfcf.2016.01.001]
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尾巨桉液流密度动态及其影响因子分析()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
36
期数:
2016年01期
页码:
1-7
栏目:
出版日期:
2016-01-15

文章信息/Info

Title:
Dynamics of sap flow density of Eucalyptus urophylla×Eucalyptus grandis and relationship with environmental factors
作者:
任世奇12 邓紫宇2 郭东强2 卢翠香2 项东云2 肖文发1
1. 中国林业科学研究院森林生态环境与保护研究所, 北京 100091;
2. 广西壮族自治区林业科学研究院广西南宁桉树林生态系统定位观测研究站, 广西 南宁 530002
Author(s):
REN Shiqi12 DENG Ziyu2 GUO Dongqiang2 LU Cuixiang2 XIANG Dongyun2 XIAO Wenfa1
1. Research Institute of Forest Ecological Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;
2. Guangxi Zhuang Autonomous Region Forestry Research Institute, Nanning Eucalypt Ecosystem Observation and Research Station for Guangxi, Nanning, Guangxi 530002, China
关键词:
尾巨桉热扩散式探针液流密度环境因子
Keywords:
Eucalyptus urophylla×Eucalyptus grandisthermal dissipation probesap flow densityenvironmental factor
分类号:
S718.43
DOI:
10.13324/j.cnki.jfcf.2016.01.001
摘要:
采用热扩散树干液流仪监测树干液流,自动气象站同步监测环境因子,研究尾巨桉不同季节液流密度日变化、液流密度日均值和月均值的季节变化及其主导环境影响因子。结果表明,尾巨桉单木液流密度日变化呈现昼高夜低的典型单峰变化规律;不同季节液流密度日变化差异较大,主要表现在液流密度启动并迅速增加时刻、液流密度峰值及到达时刻、白天液流持续时间和液流密度降低并保持微弱时刻;液流密度的季节动态总体表现为春季和夏季最大,秋季其次,冬季最小。光合有效辐射和水汽压亏缺是影响尾巨桉液流密度的主导因子,但研究地区土壤含水率不是限制液流密度的主要因子。以光合有效辐射和水汽压亏缺为自变量拟合的线性回归方程可用于估算尾巨桉液流密度瞬时值,为估算液流通量奠定基础。
Abstract:
To study daily change, seasonal change of sap flow density of Eucalyptus urophylla×Eucalyptus grandis and also to find dominant factors impacting on sap flow density, the method of Grainier thermal dissipation probe was adopted to measure the sap flow density, and weather station was utilized to monitor air environmental factors. The results showed that daily change of sap flow density of Eucalyptus urophylla×Eucalyptus grandis presented an obvious change rule with high density during the day but low in the night. There were some large differences of daily change of sap flow density among seasons, which were the start and rapid increasing time of sap flow density, the top and arrival time of sap flow density, the last time of sap flow density in the day and the time of tiny sap flow density at dusk. In seasonal change rule, sap flow density in spring and summer showed higher than others, followed by that in autumn, and the lowest in winter. Photosynthetically active radiation (PAR) and atmospheric pressure deficit (VPD) were the dominant factors influencing sap flow density, soil volume water content (VWC) was not a main factor to restrict sap flow density in the area. The linear regression equation could be used to estimate the instantaneous sap flow density, and it is going to lay a foundation for estimating sap flow flux of Eucalyptus urophylla×Eucalyptus grandis in the future.

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备注/Memo

备注/Memo:
收稿日期:2015-6-10;改回日期:2015-7-30。
基金项目:广西自然科学基金项目(2013GXNSFBA019082);广西优良用材林资源培育重点实验室开放课题(13B0201);广西科学研究与技术开发计划重大专项(桂科重1347001)。
作者简介:任世奇(1984-),男,工程师,博士研究生,从事人工林培育与生态监测研究。
通讯作者:肖文发(1964-),男,研究员,博士,从事森林生态系统管理研究。
更新日期/Last Update: 1900-01-01