Spectroscopy and Spectral Analysis, Volume. 42, Issue 4, 1313(2022)

Spectral Angles of Plant Leaves as Indicators of Uranium Pollution in Soil

Wei-hong WANG1; 2; *;, Xue-gang LUO1; 3;, Feng-qiang WU1; 2;, Ling LIN1; 2;, and Jun-jie LI1; 2;
Author Affiliations
  • 1. Environment and Resource College, Southwest University of Science and Technology, Mianyang 621010, China
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    Figures & Tables(6)
    • Table 1. The selected growth periods of measuring spectra

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      Table 1. The selected growth periods of measuring spectra

      实验植物实验设计时选择的生长期
      苎麻苗期开花期成熟期
      印度芥菜苗期开花期成熟期*
      酸模苗期旺盛期成熟期
      油菜苗期蕾薹期成熟期
      玉米苗期开花期成熟期*
    • Table 2. Main technical parameters of PSR-2500 spectrometer

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      Table 2. Main technical parameters of PSR-2500 spectrometer

      标称测量范围实际测量范围波长准确度光谱分辨率仪器采样间隔
      350~2 500 nm334.3~2 535.9 nm5 nm≤3.5 nm(350~1 000 nm);
      ≤22 nm(1 000~2 500 nm)
      0.2~1.6 nm(350~1 000 nm), 平均1.5 nm
      6~6.4 nm(1 000~2 500 nm)
    • Table 3. Proportions of spectral angles greater than threshold values of experimental plants under soil uranium pollution (%)

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      Table 3. Proportions of spectral angles greater than threshold values of experimental plants under soil uranium pollution (%)

      实验植物生长期波段区间
      350~716 nm717~975 nm976~1 265 nm1 266~1 770 nm1 771~2 500 nm
      苗期100%100%100%100%100%
      苎麻开花期81.0%90.5%90.5%95.2%100%
      成熟期95.2%90.5%23.8%23.8%28.6%
      印度芥菜苗期
      开花期
      95.2%
      90.5%
      95.2%
      90.5
      90.5%
      81.0%
      90.5%
      95.2%
      90.5%
      95.2%
      苗期100%81.0%95.2%81.0%85.7%
      酸模旺盛期100%81.0%100%90.5%95.2%
      成熟期90.5%100%90.5%100%100%
      苗期95.2%100%90.5%90.5%100%
      油菜蕾薹期100%95.2%95.2%95.2%100%
      成熟期90.5%95.2%81.0%100%90.5%
      玉米苗期
      开花期
      90.5%
      90.5%
      95.2%
      95.2%
      100%
      100%
      81.0%
      81.0%
      100%
      90.5%
    • Table 4. Correlations between spectral angles of experimental plants and uranium contents in soil

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      Table 4. Correlations between spectral angles of experimental plants and uranium contents in soil

      实验植物生长期波段区间
      350~716 nm717~975 nm976~1 265 nm1 266~1 770 nm1 771~2 500 nm
      苎麻苗期0.921**0.935**0.760*0.709*
      印度芥菜苗期
      开花期
      0.798*
      0.902**
      0.862**
      酸模旺盛期
      成熟期
      0.842**
      0.771*

      0.751*
      油菜苗期
      蕾薹期
      0.917**
      0.804*
      0.740*
      0.835**
      0.755*
      0.909**
      玉米苗期
      开花期
      0.768*
      0.763*

      0.835**
      0.795*
      0.730*
    • Table 5. Linear regression equations between soil uranium contents and spectral angles of experimental plants

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      Table 5. Linear regression equations between soil uranium contents and spectral angles of experimental plants

      植物-生长期线性回归方程R2pFRMSE
      苎麻-苗期Y=-52.038+62.037×T波段1+3 592.58×T波段2+1 832.4×T波段30.920.01315.894.56
      印度芥菜-苗期Y=-174.74+150.607×T波段1+11 727.65×T波段30.740.0337.278.18
      印度芥菜-开花期Y=-82.38+7 191.35×T波段20.810.00226.329.70
      酸模-旺盛期Y=-105.44+757.03×T波段10.710.00814.587.35
      酸模-成熟期Y=-205.45+384.44×T波段3+7743.83×T波段50.780.0219.107.51
      油菜-蕾薹期Y=-354.687+11 914.16×T波段50.830.00128.496.72
      玉米-苗期Y=-264.94+10 813.37×T波段10.590.0238.6010.70
      玉米-开花期Y=-206.64-4 536.73×T波段2+20 491.2×T波段30.700.04915.788.85
    • Table 6. Uranium contents in leaves of experimental plants under different treatment concentrations

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      Table 6. Uranium contents in leaves of experimental plants under different treatment concentrations

      铀处理浓度苎麻印度芥菜酸模油菜玉米
      254.23±0.414.84±0.24.98±1.225.69±1.23.45±0.3
      758.23±2.122.31±2.16.26±2.138.05±3.23.73±0.2
      12511.40±0.842.40±3.48.19±1.248.55±9.22.93±0.3
      17515.38±5.667.00±4.59.16±2.156.58±8.35.93±0.4
      27519.12±5.172.51±7.910.62±3.265.66±19.26.89±2.2
      37522.12±3.482.38±11.214.47±2.676.99±22.17.99±2.1
      48580.80±19.195.62±21.414.89±3.291.01±18.18.29±3.2
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    Wei-hong WANG, Xue-gang LUO, Feng-qiang WU, Ling LIN, Jun-jie LI. Spectral Angles of Plant Leaves as Indicators of Uranium Pollution in Soil[J]. Spectroscopy and Spectral Analysis, 2022, 42(4): 1313

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    Paper Information

    Category: Research Articles

    Received: Mar. 27, 2021

    Accepted: --

    Published Online: Jul. 25, 2023

    The Author Email: Wei-hong WANG (wangweihong@swust.edu.cn)

    DOI:10.3964/j.issn.1000-0593(2022)04-1313-05

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