Assessing crop water stress of winter wheat by thermography under different irrigation regimes in North China Plain

作     者：Shamaila Zia Du Wenyong Wolfram Spreer Klaus Spohrer He Xiongkui Joachim Müller 

作者机构：Institute of Agricultural Engineering in the Tropics and Subtropics(440e)Universität HohenheimStuttgartGermany College of ScienceCentre for Chemicals Application TechnologyChina Agricultural UniversityBeijing 100083China 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2012年第5卷第3期

页      面：24-34页

核心收录：

学科分类：0710[理学-生物学] 0810[工学-信息与通信工程] 1002[医学-临床医学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）] 10[医学] 

基　　金：supported by Deutsche Forschungsgemeinschaft(DFG)-GRK 1070 Bonn Germany 

主　　题：CWSI Triticum aestivum L. stomatal conductance canopy temperature yield 

摘      要：Thermal imaging can be used as an indicator of water stress due to the closure of stomatal *** this paper,we analyzed the robustness and sensitivity of thermography of winter wheat in the North China *** seasonal and diurnal variations of Crop Water Stress Index(CWSI)were *** treatments were applied by means of irrigation,with plots receiving 100%of ETo(DI),50%(D50),16%(D16)and no irrigation(NI).A high correlation was found between stomatal conductance(gs)and CWSI,depending on the phenological stage of the crop with R2=0.44 at pre-heading stage and R2=0.77 at post-heading *** addition,a high correlation between yield and CWSI at different growth stages indicates that thermography can predict *** measurements of canopy temperature were taken to study the effect of the time of day on image acquisition and it was found that midday was the most appropriate *** results should assist in designing precision irrigation scheduling for setting the threshold values.