Correlation between nitrogen vertical distribution and spectral characteristics of flue-cured tobacco

被引：0

作者：

Ye, Xiaoqing ^{[1
]}

Zou, Yong ^{[1
]}

Yu, Zhihong ^{[2
]}

Chen, Yufeng ^{[1
]}

Wang, Wei ^{[2
]}

Chen, Jianjun ^{[2
]}

机构：

[1] Shenzhen Tobacco Industry Co. Ltd.

[2] Tobacco Laboratory, South China Agricultural University

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2013年 / 44卷 / 05期

关键词：

Canopy spectral; Flue-cured tobacco; Nitrogen accumulation; Vertical distribution;

D O I：

10.6041/j.issn.1000-1298.2013.05.038

中图分类号：

学科分类号：

摘要：

The quantitative relationship between vertical distribution of above-ground nitrogen accumulation and canopy reflectance spectra in flue-cured tobacco (Nicotiana tabacum L.) was studied. It aimed at determining the contribution of leaf layers especially middle layer and lower layer to canopy reflectance, and constructing vertical distribution inversion model of nitrogen accumulation in different leaf layers and its combination in flue-cured tobacco. The field experiments with different nitrogen levels were conducted. The time-course measurements were taken on canopy spectral reflectance and weights and nitrogen contents in different plant parts and leaf layers during the experimental period. By means of analysis of correlation with experimental results, it was found that RVI(810, 680) could efficiently inverse the ANA in middle layer, upper-middle layer and the whole plant layers of flue-cured tobacco. DλRed could efficiently inverse the ANA of lower layer, middle-lower layer of flue-cured tobacco. It was concluded that ANA in middle, lower layer and the whole plantlets of flue-cured tobacco could be monitored directly by key vegetation indices.

引用

页码：219 / 225

页数：6

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