Transient response of sap flow to wind speed

NCU Institutional Repository > 工學院 > 土木工程研究所 > 期刊論文 > Item 987654321/26288

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/26288

题名:	Transient response of sap flow to wind speed
作者:	Chu,CR;Hsieh,CI;Wu,SY;Phillips,NG
贡献者:	土木工程研究所
关键词:	NATURAL TEMPERATURE-GRADIENTS;THERMAL DISSIPATION PROBES;TIME-SERIES;WATER;TRANSPIRATION;TREES;SYSTEM
日期:	2009
上传时间:	2010-06-29 17:10:01 (UTC+8)
出版者:	中央大學
摘要:	Transient responses of sap flow to step changes in wind speed were experimentally investigated in a wind tunnel. A Granier-type sap flow sensor was calibrated and tested in a cylindrical tube for analysis of its transient time response. Then the sensor was used to measure the transient response of a well-watered Pachira macrocarpa plant to wind speed variations. The transient response of sap flow was described using the resistance-capacitance model. The steady sap flow rate increased as the wind speed increased at low wind speeds. Once the wind speed exceeded 8.0 m s(-1), the steady sap flow rate did not increase further. The transpiration rate, measured gravimetrically, showed a similar trend. The response of nocturnal sap flow to wind speed variation was also measured and compared with the results in the daytime. Under the same wind speed, the steady sap flow rate was smaller than that in the daytime, indicating differences between diurnal and nocturnal hydraulic function, and incomplete stomatal closure at night. In addition, it was found that the temporal response of the Granier sensor is fast enough to resolve the transient behaviour of water flux in plant tissue.
關聯:	JOURNAL OF EXPERIMENTAL BOTANY
显示于类别:	[土木工程研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	1303	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....