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苹果冠层叶绿素含量高光谱估算模型
引用本文:董淼,王振锡. 苹果冠层叶绿素含量高光谱估算模型[J]. 新疆农业科学, 2018, 55(6): 981-990. DOI: 10.6048/j.issn.1001-4330.2018.06.001
作者姓名:董淼  王振锡
作者单位:新疆农业大学林学与园艺学院/新疆教育厅干旱区林业生态与产业技术重点实验室,乌鲁木齐 830052;
基金项目:新疆维吾尔自治区高校科研计划项目(XJEDU2017M013);中国博士后科学基金项目(2015 M572668 XB)
摘    要:【目的】 研究一种快速、简便、无损的苹果冠层叶绿素含量估测模型。探索苹果品种岩富10号冠层的高光谱特征和叶绿素含量的估测方法,为该地区岩富10号苹果营养的快速诊断奠定基础,为红富士苹果精准化管理和-7光谱尺度研究提供参考依据。【方法】以红富士苹果(Malus domestica Borkh. cv. Red Fuji)主栽品种岩富10号叶绿素含量以及冠层高光谱反射率为数据源,分析叶绿素含量与冠层原始光谱(R)、微分光谱(R')之间的相关关系,利用敏感波段建立新的对应关系,构建岩富10号叶绿素含量的多种回归估测模型,并对不同模型进行了精度评价。【结果】微分光谱用于岩富10号叶绿素含量的估测精度要显著高于原始光谱反射率;利用敏感波段组合新定义的衍生变量拟合程度更优;在多种回归方式中,三次多项式模型的拟合程度最好,最优模型为357 nm等7个波段组合定义的新植被指数所建立的三次多项式模型,其精度为0.839。【结论】应用光谱技术对南疆塔里木盆地阿克苏地区岩富10号叶绿素含量进行定量反演是可行的。

关 键 词:苹果  高光谱  叶绿素含量  
收稿时间:2018-04-18

Models for Estimating Canopy Chlorophyll Content of Malus domestica Borkh. cv. Red Fuji Cultivar Yanfu No.10 Using Hyperspectral Reflectance
DONG Miao,WANG Zhen-xi. Models for Estimating Canopy Chlorophyll Content of Malus domestica Borkh. cv. Red Fuji Cultivar Yanfu No.10 Using Hyperspectral Reflectance[J]. Xinjiang Agricultural Sciences, 2018, 55(6): 981-990. DOI: 10.6048/j.issn.1001-4330.2018.06.001
Authors:DONG Miao  WANG Zhen-xi
Affiliation:College of Forestry and Horticulture,Xinjiang Agricultural University / Key Laboratory of Forestry Ecology and Industry Technology in Arid Region, Education Department of Xinjiang, Urumqi 830052, China;
Abstract:【Objective】 The project aims to seek a fast, simple and non-destructive model for estimating chlorophyll content in apple canopy when using chlorophyll content and canopy hyperspectral reflectance ofMalus domestica Borkh. cv. Red Fuji cultivar Yanfu No.10 as data sources.【Method】Based on the analysis of the correlation between chlorophyll content and the original canopy spectral elements (R), a new correspondence was established by using sensitive bands, and a variety of regression models for estimating the chlorophyll content of Yanfu No. 10 are established, and the accuracy of different models was evaluated.【Result】The accuracy of estimating chlorophyll content of Yanfu No.10 by differential spectrum was significantly higher than that of original spectral reflectance, and better fitting degree of derivative variables was obtained by using the new definition of combination of sensitive bands; Among the multiple regression methods, the optimal model was a cubic polynomial model defined by a combination of seven bands, such as 357 nm, with the precision of 0.839.【Conclusion】Quantitative inversion of chlorophyll content of Yanfu No.10 in Aksu area of southern Xinjiang basin is feasible by using spectral technique. By studying the estimation method of hyperspectral characteristics and chlorophyll content of Yanfu No.10. Red Fuji canopy, good results have been achieved, which has laid a foundation for rapid diagnosis of regional apple tree nutrition, and provided information support for the precision management ofMalus domestica Borkh. cv. Red Fuji, as well. And at the same time, it has provided a reference for the spectral scale research.
Keywords:Malus domestica Borkh. cv.   hyperspectral   chlorophyll content  
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