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Spectral Characteristics of Tobacco Cultivars with Different Nitrogen Efficiency and Its Relationship with Nitrogen Use
Abstract : To investigate the relationship between spectral characteristics of
tobacco cultivars and their nitrogen use characters, four tobacco
cultivars with different nitrogen use efficiency were used in a
15N pot experiment. The result showed
that, in the visible light range, the spectral reflectance was lower in
higher nitrogen level (N2) than N1, while opposite in near infrared
range. The spectral reflectance of K326 and HD were lower than ZY100 and
NC89 in visible light range, which closely related to their higher
chlorophyll content. Both the nitrogen utilization rate of basal
fertilizer and topdressing fertilizer in HD and K326 were higher than
that in ZY100 and NC89 under N1 and N2 levels. The basal fertilizer use
efficiency was negatively correlated with ρ550, and significantly positively correlated with
RVI (800, 550), DVI (800, 550) and NDVI (800, 550) both in N1 and N2
level. The top dressed fertilizer use efficiency was significantly
positively correlated with RVI (800, 550), DVI (800, 550) and NDVI (800,
550) in N1 level. Therefore, spectral characteristics can be an
important method for diagnosing tobacco nitrogen metabolism
characteristics.
Cited literature [17 references]
https://hal.inria.fr/hal-01220833
Contributor : Hal Ifip Connect in order to contact the contributor
Submitted on : Tuesday, October 27, 2015 - 8:26:42 AM
Last modification on : Wednesday, January 17, 2018 - 10:45:35 AM
Long-term archiving on: : Thursday, January 28, 2016 - 10:23:19 AM
Contributor : Hal Ifip Connect in order to contact the contributor
Submitted on : Tuesday, October 27, 2015 - 8:26:42 AM
Last modification on : Wednesday, January 17, 2018 - 10:45:35 AM
Long-term archiving on: : Thursday, January 28, 2016 - 10:23:19 AM
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