Spectroscopy and Spectral Analysis, Volume. 41, Issue 8, 2604(2021)
A New Copper Stress Vegetation Index NCSVI Explores the Sensitive Range of Corn Leaves Spectral Under Copper Pollution
Figures & Tables(10)
Fig. 4. Schematic diagram of the spectral subintervals in corn leaves
Fig. 5. Correlation between VIs and Cu2+ contents in corn leaves by experiment in 2016
Fig. 6. Correlation between VIs and Cu2+ contents in corn leaves by experiment in 2014
Table 1. Cu2+ contents in corn leaves
View tableView in ArticleTable 1. Cu2+ contents in corn leaves
样品
年份样品编号 胁迫浓度/
(μg·g-1)Cu2+含量/
(μg·g-1)2016 Cu(0) 0 9.77 Cu(200) 200 31.29 Cu(300) 300 75.78 Cu(500) 500 54.51 Cu(700) 700 114.79 2014 Cu(0) 0 1.08 Cu(250) 250 4.96 Cu(500) 500 9.46
Table 2. Computing formula of vegetation indexes
View tableView in ArticleTable 2. Computing formula of vegetation indexes
植被指数 名称 计算公式 WBI 水波段指数 R900/R970 MCARI 改进的叶绿素吸收率指数 ((R700-R670)-0.2(R700-R550))(R700/R670) NDWI 归一化水指数 (R860-R1 240)/(R860+R1 240)
Table 3. Statistics and correlation calculation results of NCSVI and conventional VIs by experiment in 2016
View tableView in ArticleTable 3. Statistics and correlation calculation results of NCSVI and conventional VIs by experiment in 2016
指数 子区间 Cu(0) Cu(200) Cu(300) Cu(500) Cu(700) R RMSE NCSVI 350~430 nm(紫谷) 0.33 0.37 0.27 0.34 0.16 -0.88 17.09 430~530 nm(蓝边) 0.29 0.33 0.23 0.32 0.12 -0.85 19.22 530~580 nm(绿峰) 0.12 0.12 0.04 0.10 -0.09 -0.94* 12.57 580~650 nm(黄边) 0.16 0.26 0.06 0.15 -0.06 -0.88 17.47 650~690 nm(红谷) 0.21 0.27 0.15 0.25 0.03 -0.84 19.64 690~750 nm(红边) -0.05 -0.07 -0.12 -0.07 -0.17 -0.97* 8.71 750~1 301 nm(近红外平台) -0.13 -0.12 -0.15 -0.13 -0.19 -0.87 17.97 1 301~1 500 nm(近谷) 0.11 0.11 0.07 0.11 0.01 -0.94* 12.71 1 500~1 590 nm(近边) 0.09 0.18 0.03 0.08 -0.02 -0.82 20.68 1 590~1 919 nm(近峰 A) 0.06 0.05 0.01 0.04 -0.05 -0.96* 10.06 1 919~2 500 nm(近峰 B) 0.18 0.28 0.12 0.17 0.06 -0.79 22.09 WBI - 1.05 1.03 1.03 1.04 1.03 -0.68 26.63 MCARI - 16.95 28.03 33.49 29.71 30.57 0.75 24.21 NDWI - 0.06 0.04 0.04 0.05 0.04 -0.65 27.48
Table 4. Statistics and correlation calculation results of NCSVI and conventional VIs by experiment in 2014
View tableView in ArticleTable 4. Statistics and correlation calculation results of NCSVI and conventional VIs by experiment in 2014
指数 子区间 Cu(0) Cu(250) Cu(500) r RMSE NCSVI 350~430 nm(紫谷) 0.40 0.39 0.39 -0.75 2.25 430~530 nm(蓝边) 0.36 0.35 0.36 0.61 2.71 530~580 nm(绿峰) 0.21 0.19 0.18 -0.90* 1.50 580~650 nm(黄边) 0.32 0.30 0.30 -0.79 2.08 650~690 nm(红谷) 0.37 0.36 0.37 0.19 3.36 690~750 nm(红边) 0.04 0.02 0.01 -0.97* 0.85 750~1 301 nm(近红外平台) -0.10 -0.10 -0.10 -0.27 3.30 1 301~1 500 nm(近谷) 0.16 0.15 0.14 -0.97* 0.78 1 500~1 590 nm(近边) 0.13 0.12 0.11 -0.89 1.58 1 590~1 919 nm(近峰 A) 0.09 0.08 0.08 -0.93* 1.29 1 919~2 500 nm(近峰 B) 0.23 0.21 0.21 -0.80 2.04 WBI - 0.99 1.03 1.03 0.81 2.02 MCARI - 14.43 12.75 16.00 0.52 2.92 NDWI - 0.07 0.05 0.05 -0.85 1.78
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Tian XIA, Ke-ming YANG, Fei-sheng FENG, Hui GUO, Chao ZHANG. A New Copper Stress Vegetation Index NCSVI Explores the Sensitive Range of Corn Leaves Spectral Under Copper Pollution[J]. Spectroscopy and Spectral Analysis, 2021, 41(8): 2604
Paper Information
Category: Research Articles
Received: Apr. 24, 2020
Accepted: --
Published Online: Sep. 8, 2021
The Author Email: XIA Tian (810981291@qq.com)
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