Study On The Relationship Between The Winter Wheat Thermal Infrared Image Characteristics And Physiological Indicators

文献类型： 外文期刊

第一作者： Chen Zi-long

作者： Chen Zi-long;Wang Cheng;Zhu Da-zhou

作者机构：

关键词： Thermal infrared imaging;Winter wheat;Stomatal conductance;SPAD;Drought resistance

期刊名称：INTERNATIONAL SYMPOSIUM ON OPTOELECTRONIC TECHNOLOGY AND APPLICATION 2014: INFRARED TECHNOLOGY AND APPLICATIONS

ISSN： 0277-786X

年卷期： 2014 年 9300 卷

页码：

收录情况： SCI

摘要： Arid directly affects crop growth and yield, such as reduces photosynthesis, weakens respiration rate, slows down the material transport, disorders stomatal switch, blocks the synthesis of chlorophyll, affects the cell wall and protein synthesis, etc., eventually leads to the reduction of output. How to solve this problem? This paper proposes a drought index based on thermal imaging technology. Canopy temperature distribution can reflect the growth of crops. And using thermal imaging technology can access to crop canopy temperature distribution quickly. Physiological indexes such as the changes of stomatal conductance and chlorophyll content is the important basis of crop drought resistance identification. So this paper studied the distribution of wheat canopy temperature with the change of stomatal conductance and chlorophyll content under drought conditions. The study was based on different drought resistant genotypes of winter wheat in Xinjiang with German JENOPTIK portable infrared thermal imager for canopy temperature information. The canopy leaf stomatal conductance and chlorophyll content was measured by SC-1 porosity meter and SPAD chlorophyll meter. Results prove that winter wheat canopy temperature decreases with the increase of stomatal conductance in dry conditions, which has a good linear relationship (r=-0.67). The correlation of canopy temperature and stomatal conductance of poor drought resistance(-0.93) is greater than that of good one(-0.46). There is significant difference between stomatal conductance and chlorophyll content of different drought resistance varieties(P<0.05). The variety of poor drought resistance is greater that of good one in morning-afternoon stomatal conductance change. And the chlorophyll content of the variety of good drought resistance is greater that of poor one. The conclusions above show that canopy temperature distribution has good correlation with the crop drought resistance indexes and can be used as an early indicator of drought resistance identification. This conclusion has important significance for drought resistance identification, the reasonable irrigation guidance and improving the water use efficiency.

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