Spectroscopy and Spectral Analysis, Volume. 41, Issue 12, 3682(2021)
Effect of Soil Particle Size on Prediction of Soil Total Nitrogen Using Discrete Wavelength NIR Spectral Data
Figures & Tables(7)
Fig. 1. Spectral curves of soil with different particle sizes but same soil total nitrogen concentration
Fig. 3. Prediction of soil particle size classification based on SVM
Fig. 4. Absorbance at six wavebands
(a): Original absorbance; (b): Corrected absorbance
Fig. 5. Prediction results of soil total nitrogen concentration based on different soil absorbances
(a): Original absorbance; (b): Corrected absorbance;(c): 0.2 mm soil absorbance
Table 1. Statistics of soil samples
View tableView in ArticleTable 1. Statistics of soil samples
土壤
粒度/mm氮素等级/
(g·kg-1)氮素浓度范围/
(g·kg-1)土壤
粒度/mm氮素等级/
(g·kg-1)氮素浓度范围/
(g·kg-1)2.0 0 0.005~0.012 0.9 0 0.003~0.012 0.04 0.036~0.047 0.04 0.029~0.037 0.08 0.071~0.077 0.08 0.076~0.091 0.12 0.109~0.123 0.12 0.119~0.133 0.16 0.162~0.171 0.16 0.153~0.176 0.20 0.186~0.194 0.20 0.191~0.206 0.45 0 0.006~0.02 0.2 0 0.009~0.018 0.04 0.031~0.042 0.04 0.026~0.04 0.08 0.063~0.071 0.08 0.060~0.067 0.12 0.119~0.131 0.12 0.128~0.138 0.16 0.142~0.153 0.16 0.153~0.169 0.20 0.178~0.190 0.20 0.187~0.199
Table 2. Accuracy statistics of the BPNN models based on different soil absorbances
View tableView in ArticleTable 2. Accuracy statistics of the BPNN models based on different soil absorbances
建模样本 RMSEP RPD 原始土壤吸光度 0.60 0.256 1.91 修正土壤吸光度 0.75 0.187 2.53 0.2 mm土壤吸光度 0.82 0.165 2.89
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Peng ZHOU, Wei-chao WANG, Wei YANG, Rong-hua JI, Min-zan LI. Effect of Soil Particle Size on Prediction of Soil Total Nitrogen Using Discrete Wavelength NIR Spectral Data[J]. Spectroscopy and Spectral Analysis, 2021, 41(12): 3682
Paper Information
Category: Research Articles
Received: Oct. 9, 2020
Accepted: --
Published Online: Dec. 17, 2021
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