田间不同成熟度烤烟上部叶的高光谱特征分析  

Hyperspectral Characteristics of Field Upper Leaves of Flue cured Tobacco with Different Maturity

作　　者：王建伟[1] 张艳玲[1] 李海江[2] 刘阳[1] 梁太波[1] 过伟民[1] 张仕祥[1] 

机构地区：[1]中国烟草总公司郑州烟草研究院 [2]河南省烟草公司平顶山市公司

出　　处：《烟草科技》2013年第5期64-67,共4页Tobacco Science & Technology

基　　金：郑州烟草研究院院长科技发展基金项目"烤烟上部烟叶田间成熟度的高光谱识别"(112011CA0230)

摘　　要：为明确不同田间成熟度烟叶的高光谱特征,以上部烟叶为研究对象,分析了不同成熟度烟叶的高光谱反射率、位置变量、面积变量和植被变量等光谱参数的差异。结果表明:①烟叶在可见光范围内(400～680 nm)的反射率小于35%,且随着成熟度的提高逐渐升高,尤其是550～680 nm范围的光谱反射率对不同成熟度烟叶有较好的"区分效应";而近红外范围内的反射率在60%左右,且呈现出随烟叶成熟度提高而减小的趋势。②随烟叶成熟度的提高,绿峰幅值、红光吸收谷幅值逐渐增大;绿峰位置、红光吸收谷位置有推后的趋势;红边位置则逐渐提前;红边面积与蓝边面积的比值及归一化比值显著降低,绿峰与红谷的比值及归一化比值有降低的趋势。部分光谱参数随烟叶成熟度的提高呈现规律性的变化,这为利用光谱参数开发烟叶田间成熟度的判别工具提供了数据基础和理论依据。To find out the hyperspectral characteristics of field leaves of flue-cured tobacco with different maturity, the differences of spectral parameters, including hyperspectral reflectance, variables about position, area and vegetation, between leaves of different maturity were analyzed by taking upper leaves as objects. The results showed： 1） Within the range of visible bands （400-680 nm）, the reflectance of leaves was lower than 35%, and it increased gradually with the increase of maturity, especially in the range of 550-680 nm, in which the leaves of different maturity could be well discriminated from each other; while in the range of infra-red bands, the reflectance was about 60% and it decreased with the increase of maturity. 2） Along with the increase of maturity, the reflectance of green peak （Rg） and red valley （Rr） increased, the locations of green-peak （λg） and red-valley （λv） tended to lag behind, while red-edge （λr） advanced gradually, the ratio of red-edge area to blue-edge area （SDr/SDb） and the normalized ratio of SDr to SDb [（SDr-SDh）/（SDr ＋ SDb）] significantly reduced, and the Rg/Rr, the normalized ratio of Rg to Rr [（Rg-Rr）/（Rg＋Rr）] tended to decrease. Some of the spectral parameters varied regularly with the increase of maturity, which provided a base of data and theory for developing a tool to discriminate the maturity of leaves in field with spectral parameters.

关 键 词：烤烟 成熟度 高光谱 

分 类 号：S572.01[农业科学—烟草工业]