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首页> 外文会议>Conference on Ecosystems' Dynamics, Agricultural Remote Sensing and Modeling, and Site-Specific Agriculture; Aug 7, 2003; San Diego, California, USA >The Study on the Change Law of Hyperspectral Data and Pigments for Rice in Mature Process
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The Study on the Change Law of Hyperspectral Data and Pigments for Rice in Mature Process

机译：水稻成熟期高光谱数据和色素变化规律的研究

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摘要

The hyperspectral reflectances of the canopy, the sword leaf , the third unfolding leaf from the top and ear of the main stem of two varieties of rice are measured by a ASD FieldSpec Pro FR~(TM) n field and indoor under 3 nitrogen support levels in mature process. The concentrations of chlorophyll and carotenoid of leaves and ears corresponding to the spectra were determined by biochemical method. The spectral differences are significant for the canopy and leaves of rice under different nitrogen support levels, and the concentrations of chlorophyll and carotenoid of leaves increase with the increasing of nitrogen applying. There exist significant differences for the pigment concentrations of the leaves of rice under different nitrogen levels. The spectral reflectances of the canopy are gradually getting bigger in the visible region and smaller in the near infrared region as the growth stage goes on. 'Blue shift' phenomena for the spectra red edge position of the canopy, leaves and ears were proved. The concentrations of chlorophyll and carotenoid of leaves and ears are very significantly correlative to the spectral vegetation indices VI1(= R_(990)/R_(553)), VI2(= R_(1200)/R_(553)), VI3(= R_(750)/R_(553)), VI4(= R_(670)/R_(440)), VI5(= R_(553)/R_(670)), PRVI(=R_(800)/_(553)), PSSRa, PSNDa and λ_(red) (the red edge position). The results show that these Vis can be used to estimate the concentrations of chlorophyll and carotenoid of leaves and ears of rice.
机译：在A3 FieldSpec Pro FR〜（TM）n田间和室内在3种氮素支持水平下测量了两个水稻品种的主茎的顶盖，剑叶，从顶部和耳朵伸出的第三张展开叶的高光谱反射率在成熟的过程中。用生化法测定了与光谱对应的叶和叶的叶绿素和类胡萝卜素的浓度。在不同氮素水平下，水稻冠层和叶片的光谱差异均显着，且叶片中叶绿素和类胡萝卜素的含量随施氮量的增加而增加。不同氮水平下水稻叶片的色素含量存在显着差异。随着生长期的发展，冠层的光谱反射率在可见光区域逐渐变大，而在近红外区域则逐渐变小。证明了冠层，叶子和耳朵的光谱红色边缘位置的“蓝移”现象。叶子和耳朵的叶绿素和类胡萝卜素浓度与光谱植被指数VI1（= R_（990）/ R_（553）），VI2（= R_（1200）/ R_（553）），VI3（= R_（750）/ R_（553）），VI4（= R_（670）/ R_（440）），VI5（= R_（553）/ R_（670）），PRVI（= R_（800）/ _（553） ）），PSSRa，PSNDa和λ_（红色）（红色边缘位置）。结果表明，这些Vis可用于估算稻米的叶和穗的叶绿素和类胡萝卜素的浓度。

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