基于荧光参数的棉花盛铃期水分状况高光谱监测  

Study on Hyperspectral Monitoring of Water Status in Cotton Full-Boll Stage Based on Fluorescence Parameters

作　　者：刘馨月[1] 王登伟[1] 黄春燕[1] 黄凯杰 王永胜 来瑞欣 马如海 韩勇超 王露霞 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(Key Laboratory of Oasis Eco-agriculture of Xinjiang Production and Construction Corps, College of Agronomy,Shihezi University,Shihezi Xinjiang 832003,China)

机构地区：[1]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

出　　处：《新疆农业科学》2018年第7期1177-1185,共9页Xinjiang Agricultural Sciences

基　　金：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)~~

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(r_(RVI-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。【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(PSⅡmaximum 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(r RVI-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(r restimated 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.

关 键 词：棉花 高光谱 荧光参数 水分胁迫 监测 

分 类 号：S502[农业科学—作物学]