摘要
遥感技术因快速、无损监测等优点而被广泛应用于农业领域。通过开展不同胁迫下棉花冠层光谱室外测试试验,分析不同胁迫冠层光谱特征差异,再分别建立不同的光谱特征参数判别式对其进行识别,可为棉花所受胁迫类型的快速识别提供参考。结果表明,无论哪种胁迫,棉花冠层光谱反射率形状和大小均在近红外波段变化相同,可见光波段和短波红外波段差异明显;不同胁迫下棉花冠层红边均具有“双峰”现象,红边峰值减小,红边位置均发生“蓝移”;黄萎病、枯萎病、干旱、红蜘蛛、角斑病、红叶茎枯病和蚜虫胁迫下冠层的吸收波段位置(Lo)、吸收深度(Depth672)和吸收面积(Area672)均明显减小,吸收宽度(Lwidth)均明显增加,而缺氮和盐害的Lo、Depth672和Area672基本不变,Lwidth均略微增加;不同胁迫下棉花冠层10个光谱特征参数表现出一定的规律,可建立相应的判别式实现对棉田所受胁迫类型的快速识别。
Remote sensing technology was widely used in agriculture because of its advantages of fast and non-destructive monitoring.Through test experiment for cotton canopy spectra of different stresses,spectra characteristic were analyzed,different discriminant formulas of spectral characteristic parameters were established to identify different stress.Results indicated that:the numerical value and shape of reflectance had identical changed in near infrared wave band for cotton canopy with different stresses,however large changed in visible and short infrared wave bands.Cotton canopy of different stresses had all‘double peak’phenomenon in‘red edge’,and the values all decreased,the red position were all occurred moved to the blue.Absorb band position,absorb depth and absorb area of cotton canopy had obvious decreased to Verticillium wilt,Fusarium wilt,drought,red spider,angular leaf spot,red leaf disease and aphid,yet nitrogen scarcity and salt injury had a basic invariability.Absorb width had an obvious increased to Verticillium wilt,Fusarium wilt,drought,red spider,angular leaf spot red leaf disease and aphid,yet nitrogen scarcity and salt injury had a little decrease.The 10 spectral characteristic parameters of cotton canopy of different stresses were present better change rule,and the discriminate models were established to accuracy diagnose them.This study indicated it is feasible to recognize different stresses of cotton canopy by using hyperspectral remote sensing.
作者
陈兵
王琼
王静
宋勇
刘政
韩焕勇
王方永
CHEN Bing;WANG Qiong;WANG Jing;SONG Yong;LIU Zheng;HAN Huan-yong;WANG Fang-yong(Cotton Institute,Xinjiang Academy Agricultural and Reclamation Science/Northwest Inland Region Key Laboratory of Cotton Biology and Genetic Breeding,Ministry of Agriculture,Shihezi 832003,Xinjiang;Water Conservancy And Construction Institute,Xinjiang Shihezi Vocational College,Shihezi 832003,Xinjiang;Shihezi University,Shihezi 832003,Xinjiang)
出处
《绿洲农业科学与工程》
2021年第1期1-8,共8页
Oasis Agriculture Science and Engineering
基金
国家自然科学基金项目(41661089)
兵团领军人才计划(2019CB018)
新疆兵团英才第二周期项目。
关键词
棉花
冠层
胁迫
高光谱
识别
Cotton
Canopy
Stress
Hyper-Spectra
Recognizing
