| 基于荧光参数的棉花盛铃期水分状况高光谱监测 |
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| 引用本文： | 刘馨月,王登伟,黄春燕,黄凯杰,王永胜,来瑞欣,马如海,韩勇超,王露霞.基于荧光参数的棉花盛铃期水分状况高光谱监测[J].新疆农业科学,2018,55(7):1177-1185. |
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| 作者姓名： | 刘馨月 王登伟 黄春燕 黄凯杰 王永胜 来瑞欣 马如海 韩勇超 王露霞 |
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| 作者单位： | 石河子大学农学院/新疆生产建设兵团绿洲生态农业重点实验室,新疆石河子 832003 |
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| 基金项目： | 国家自然科学基金项目(31560354);人力资源和劳动社会保障部留学回国人员科技活动项目(RSLX201303) |
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| 摘 要： | 【目的】研究棉花盛铃期反射光谱、荧光参数Fv/Fm(PSⅡ最大光化学量子产量)的变化特征,确立叶绿素荧光参数与棉花冠层高光谱植被指数的相关关系。为高光谱遥感监测棉花的水分状况提供理论依据。【方法】选用棉花品种新陆早45号和新陆早62号,采用美国ASD地物高光谱仪测定田间试验条件下,设置4个不同灌水量处理,研究2个棉花品种盛铃期的冠层反射光谱,同期利用PAM-2100叶绿素荧光仪测定棉花叶片的Fv/Fm,并用相关软件对棉花的反射光谱数据及Fv/Fm进行处理并作相关分析,建立相关回归模型。【结果】不同水分处理条件下,棉花冠层反射光谱的变化趋势相似;棉花新陆早62号盛铃期的单叶荧光参数Fv/Fm与棉花冠层高光谱反射率在350~514 nm、612~692 nm和1 945~2 076 nm波段范围内呈极显著正相关,而在708~1 361 nm和1 621~1 740 nm波段范围内呈极显著负相关;采用敏感波段构建植被指数NDVI(归一化植被指数)和RVI(比值植被指数),RVI与Fv/Fm的相关性较高(rRVI-Fv/Fm=-0.721 5**,n=20,P<0.01);建立Fv/Fm与RVI的估算模型方程,Fv/Fm估测值与实测值呈极显著线性正相关(r估测Fv/Fm-实测 Fv/Fm=0.723 0**,n=20,RMSE=1.186×10-2)。【结论】利用荧光参数Fv/Fm与植被指数RVI的相关关系,可以监测棉花盛铃期的水分胁迫状况。
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| 关 键 词： | 棉花 高光谱 荧光参数 水分胁迫 监测 |
| 收稿时间： | 2018-05-07 |
Study on Hyperspectral Monitoring of Water Status in Cotton Full-Boll Stage Based on Fluorescence Parameters |
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| LIU Xin-yue,WANG Deng-wei,HUANG Chun-yan,HUANG Kai-jie,WANG Yong-sheng,LAI Rui-xin,MA Ru-hai,HAN Yong-chao,WANG Lu-xia.Study on Hyperspectral Monitoring of Water Status in Cotton Full-Boll Stage Based on Fluorescence Parameters[J].Xinjiang Agricultural Sciences,2018,55(7):1177-1185. |
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| Authors: | LIU Xin-yue WANG Deng-wei HUANG Chun-yan HUANG Kai-jie WANG Yong-sheng LAI Rui-xin MA Ru-hai HAN Yong-chao WANG Lu-xia |
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| Institution: | Key Laboratory of Oasis Eco-agriculture of Xinjiang Production and Construction Corps, College of Agronomy, Shihezi University, Shihezi Xinjiang 832003, China |
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| Abstract: | 【Objective】 By setting of a field experiment with two cotton cultivars and four level of irrigating water treatments, the paper aims to study the characteristics of the reflectance and the fluorescence parameter Fv/Fm (PSⅡ maximum photochemical quantum yield) in cotton full-boll stage, and establish the correlation relationship between the chlorophyll fluorescence parameters and the hyperspectral vegetation index in the hope of providing a theory for monitoring the water stresses status over cotton canopy by using hyperspectral remote sensing.【Method】The reflectance of cotton canopy was measured by Field Spec Analytical Spectral Device in full-boll stage; At the same time, the leaf FV/Fm of cotton was measured by PAM-2100 chlorophyll fluorescence instrument, and the reflection spectrum data and FV/FM of cotton were processed and analyzed by correlation software, and the correlation regression model was established.【Result】The variation trend of cotton canopy reflectance spectra under different water treatment conditions was similar. During the full-boll stage, the Fv/Fm of single leaf of Xinluzao NO. 62 was positively correlated with canopy reflectance with the bands of 350-514 nm, 612-692 nm and 1,945-2,076 nm; but it was negatively correlated with the bands of 708~1,361 nm and 1,621-1,740 nm. The vegetation index NDVI (normalized difference vegetation index) and RVI (ratio vegetation index), were constructed by using sensitive bands, and there was a higher correlation between RVI and Fv/Fm (rRVI-Fv/Fm=-0.721,5**, n=20, P<0.01). The equation of estimating Fv/FM and RVI was established and the estimated value of FV/FM was positively correlated with the measured value (rrestimated Fv/Fm-measured Fv/Fm=0.723,0**, n=20, RMSE=1.186 × 10-2).【Conclusion】It showed that based on the correlation between the fluorescence parameter FV/FM and the vegetation index (RVI), the water stress status of cotton in boll stage can be monitored. |
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| Keywords: | cotton hyper-spectral fluorescence parameters water stress monitor |
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