基于 Fraunhofer 线的小麦条锈病荧光遥感探测.pdfVIP

中国农业科学 2007,40(1):78-83 Scientia Agricultura Sinica 基于Fraunhofer线的小麦条锈病荧光遥感探测 1, 2 1 1 1 1 1 张永江 ，黄文江 ，王纪华 ，刘良云 ，马智宏 ，李佛琳 1 2 （国家农业信息化工程技术研究中心, 北京 100089 ； 河北农业大学农学院，保定 071001 ） 摘要：【目的】遥感监测小麦条锈病比传统调查方法更省时、省力并能实现大范围实时监测。【方法】田间人 工诱发产生不同发病等级的小麦条锈病群体，采用ASD光谱仪的Radiance方式对其冠层光谱进行了测定。通过比 较目标和参考板太阳光谱中两个氧吸收波段的Fraunhofer线深，计算植株发射的叶绿素荧光。【结果】760 nm处 叶绿素荧光与病情指数高度负相关，688 nm处叶绿素荧光与病情指数高度正相关。并且随着病情指数的升高，作 为反映植物胁迫状态的荧光比值指标 F688/F760 亦随之增大。另外对单叶相关光合指标测试结果表明，随着病叶 严重度水平的升高，SPAD、荧光参数Fv/Fm 和Yield以及净光合速率均有不同程度的下降。【结论】利用 Fraunhofer 线原理提取的日光诱导荧光信息可以反映田间小麦条锈病的发病状况，为病害的遥感监测提供了又一途径。 关键词：叶绿素荧光；Fraunhofer线；条锈病；小麦；被动遥感 Chlorophyll Fluorescence Sensing to Detect Stripe Rust in Wheat (Triticum aestivum L.) Fields Based on Fraunhofer Lines 1, 2 1 1 1 1 1 ZHANG Yong-jiang , HUANG Wen-jiang , WANG Ji-hua LIU Liang-yun , MA Zhi-hong , LI Fo-lin 1 2 ( National Engineering Research Center for Information Technology in Agriculture, Beijing 100089; College of Agronomy, Agricultural University of Hebei, Baoding 071001) Abstract: 【Objective 】Wheat stripe rust detection based on chlorophyll fluorescence (CF) sensing is advantageous in terms of saving time and labor.. 【Method 】Diseases with different levels were induced by artificial inoculation, and then canopy radiances were measured using the ASD field spectrometer. The amount of CF was quantified at 688 nm and 760 nm, where the solar spectrum was attenuated (Fraunhofer