Non-invasive water status detection in grapevine(Vitis vinifera L.)by thermography  

作　　者：Shamaila Zia Klaus Spohrer Nikolaus Merkt Du Wenyong Xiongkui He Joachim Müller 

机构地区：[1]Institute of Agricultural Engineering,Universität Hohenheim,Stuttgart,Germany [2]Institute for Special Crop Cultivation and Crop Physiology,Universität Hohenheim,Stuttgart,Germany [3]Centre for Chemicals Application Technology(CCAT),China Agricultural University,Beijing 100083,China

出　　处：《International Journal of Agricultural and Biological Engineering》2009年第4期46-54,共9页国际农业与生物工程学报（英文）

摘　　要：Grapevines are preferentially grown under mild to moderate water stress conditions to achieve the best compromise between wine quality and quantity.Water status detection for advanced irrigation scheduling is frequently done by predawn leaf water potential(ΨPD)or leaf stomata conductance(gL)measurements.However,these measurements are time and labor consuming.Therefore,the use of infrared thermography(IRT)opens up the possibility to study large population of leaves and to give an overview on the stomatal variation and their dynamics.In the present study IRT was used to identify water stress of potted grapevines.In order to define the sensitivity of IRT measurements to water stress,the IRT-based water status information were compared with simultaneously measuredΨPD and gL data.Correlations between IRT-based CWSI data on the one hand and gL andΨPD on the other showed the potential of IRT for water stress detection.However,the CWSI calculation procedure is laborious and the sensitivity of CWSI for water stress detection still needs to be improved.Therefore,further improvements are necessary in order to apply remote IRT-based systems for irrigation scheduling in the field.

关 键 词：infrared thermography leaf temperature stomata conductance leaf water potential plant water stress and crop water stress index(CWSI) 

分 类 号：R74[医药卫生—神经病学与精神病学]