干旱区生态环境知识资源中心(Arid): 应用热脉冲技术对胡杨树干液流变化规律的研究

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	应用热脉冲技术对胡杨树干液流变化规律的研究
其他题名	Study on the Change of Sap Flow in the Stems of Populus euphratica Using Thermal Pulse Measurement
	白云岗 1; 宋郁东 1; 周宏飞 1; 柴仲平 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2005
卷号	28 期号:3 页码:373-376
中文摘要	利用热脉冲技术对胡杨树干液流日变化、不同胸径树干液流流量、区域间耗水量的差异进行了分析.结果表明:在正常生长状态下,胡杨树干单位面积液流通量为0.450 L·cm-2·d-1,在4～8月生长期内,日平均耗水量为78.335 L/d.胡杨树干断面单位时间内液流量变化呈明显的昼夜节律,白天的流速变化曲线呈双峰型,夜间树干液流速度处于平稳的低值,白天10:00与午后18:00左右达到两个峰值.随着胸径的增大,树干液流速度和液流量也随之增大,不同研究区域、立地条件、个体、林种的胡杨耗水量差异十分显著.
英文摘要	It is necessary and very important to research water consumption of natural vegetation and its characteristics in arid areas so as to maintain and regenerate oasis ecosystems, especially in the Tarim River Basin. The thermal pulse measurement for measuring sap flow in plant stems was developed and tested to provide a means for investigating transpiration of plants under conditions without disturbing the environment. In this paper, the thermal pulse measurement is applied to study the sap flow in stems of Populus euphratica at Aksu Station for Water Balance Observation, Chinese Academy of Sciences. We investigate the diurnal change of sap flow in stems, change of sap flow in stems with the different diameters and change characteristics of sap flow in stems of Populus euphratica in different areas. The experimental results show that under the natural conditions the intensity of sap flow in stems of Populus euphratica is 0.450 L-crrf^d"1. During the growth season from April to August, the water consumption of each stem of Populus euphratica is 78.335L/d. Daily change of sap flow in stems of Populus euphratica has an obvious temporal regularity. In daytime, the change curve of sap flow in stems of Populus euphratica is bimodal, and the two peak values occur at 10:00 and 18:00 respectively. While at night, the speed of sap flow is steadily lower than that In daytime. The speed of sap flow in stems is different from the different trees of Populus euphratica, that is the speed of sap flow in stems increases with the increase of diameters of the trees of Populus euphratica. Under the conditions without disturbance of human activities, the sap flow in stems of Populus euphratica is significantly different from the different regions. For example, under the conditions that the trees of Populus euphratica have the same diameter, the average daily water consumption of a tree of Populus euphratica in the study area is three times higher than that in the Heihe River Basin, and its sap flow is also two times higher. Therefore, the water consumption of Populus euphratica is different from the different regions, growing conditions, species and even individuals. It is considered that under the natural conditions the environmental factors, such as soil moisture content, temperature, precipitation and biological structure, are the important factors affecting the transpiration of Populus euphratica.
中文关键词	热脉冲技术 ; 树干液流 ; 胡杨 ; 干旱区
英文关键词	thermal pulse measurement sap flow Populus euphratica
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1995057
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206153
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.新疆水土保持科技推广中心, 乌鲁木齐, 新疆 830000, 中国
推荐引用方式 GB/T 7714	白云岗,宋郁东,周宏飞,等. 应用热脉冲技术对胡杨树干液流变化规律的研究[J]. 中国科学院新疆生态与地理研究所,2005,28(3):373-376.
APA	白云岗,宋郁东,周宏飞,&柴仲平.(2005).应用热脉冲技术对胡杨树干液流变化规律的研究.干旱区地理,28(3),373-376.
MLA	白云岗,et al."应用热脉冲技术对胡杨树干液流变化规律的研究".干旱区地理 28.3(2005):373-376.