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- W2784583631 abstract "Nitrogen (N) is important for the growth of crops. Leaf nitrogen content (LNC) serves as a crucial indicator of the growth status of crops and can help determine the dose of N fertilizer. Laser-induced fluorescence (LIF) technology and the reflectance spectra of crops are widely used to detect the biochemical content of leaves. Many vegetation indices (VIs) and fluorescence parameters have been developed to estimate LNC. However, the comparison among VIs and between fluorescence parameters and VIs has been rarely studied in the estimation of LNC. In this study, the performances of several published empirical VIs and fluorescence parameters for the estimation of paddy rice LNC were analyzed using the support vector machine (SVM) algorithm. Then, the optimal VIs (TVI, MTVI1, MTVI2, and MSAVI) and fluorescence parameters (F735/F460 and F685/F460), which were suitable for LNC monitoring in this study, were chosen. In addition, the combination of the VIs and fluorescence parameters was proposed as the input variables in the SVM model and used to estimate the LNC. Experimental results exhibited the promising potential of the LIF technology combined with reflectance for the accurate estimation of LNC, which provided guidance for monitoring the LNC." @default.
- W2784583631 created "2018-02-02" @default.
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- W2784583631 date "2018-01-17" @default.
- W2784583631 modified "2023-10-16" @default.
- W2784583631 title "Potential of vegetation indices combined with laser-induced fluorescence parameters for monitoring leaf nitrogen content in paddy rice" @default.
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- W2784583631 doi "https://doi.org/10.1371/journal.pone.0191068" @default.
- W2784583631 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5771623" @default.
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- W2784583631 hasPublicationYear "2018" @default.
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