基于无人机多光谱数据和氮素空间分异的玉米冠层氮浓度估算
郝琪, 陈天陆, 王富贵, 王振, 白岚方, 王永强, 王志刚

Estimation of canopy nitrogen concentration in maize based on UAV multi- spectral data and spatial nitrogen heterogeneity
HAO Qi, CHEN Tian-Lu, WANG Fu-Gui, WANG Zhen, BAI Lan-Fang, WANG Yong-Qiang, WANG Zhi-Gang
表5 用于氮浓度估算的植被指数
Table 5 Vegetation index for estimation of nitrogen concentration
序号
Number
植被指数
Vegetation index
公式
Formula
来源
Resource
1 Chlorophyll index green (CI_Green) NIR/GREEN-1 Gitelson, et al.[13]
2 Green difference vegetation index (GDVI) NIR/GREEN Tucker, et al.[14]
3 Modified soil adjusted vegetation index (MSAVI) $\left[ 2\times \text{NIR}+1-\sqrt{{{\left( 2\times \text{NIR}+1 \right)}^{2}}}-8\times \left( \text{NIR}-\text{RED} \right) \right]/2$ Qi, et al.[15]
4 Modified simple ratio (MSR) [NIR/RED–1]/$\sqrt{\frac{\text{NIR}}{\text{RED}}+1}$ Chen[16]
5 Modified triangular vegetation index 1 (MTVI1) $1.2\times \left[ 1.2\times \left( \text{NIR}-\text{GREEN} \right)-2.5\times \left( \text{RED}-\text{GREEN} \right) \right]$ Haboudane, et al.[17]
6 Modified triangular vegetation index 2 (MTVI2) $\begin{align} & 1.8\times \left( \text{NIR}-\text{GREEN} \right)-3.75\times \left( \text{RED}-\text{GREEN} \right)/ \\ & \sqrt{{{\left( 2\times \text{NIR+1} \right)}^{2}}-6\times \left( \text{NIR}-5\times \sqrt{\text{RED}} \right)-0.5} \\ \end{align}$
7 Optimized soil adjusted vegetation index (OSAVI) 1.6×[(NIR-RED)/(NIR+RED+0.16)] Rondeaux, et al.[18]
8 Renormalized difference vegetation index (RDVI) $\left( \text{NIR}-\text{RED} \right)/\sqrt{\left( \text{NIR}+\text{RED} \right)}$ Roujean, et al.[19]
9 Ratio vegetation index (RVI) NIR/RED Jordan[20]
10 Soil adjusted vegetation index (SAVI) $\left( \text{NIR}-\text{RED} \right)\left( 1+0.5 \right)/\left( \text{NIR}+\text{RED}+0.5 \right)$ Huete, et al.[21]
11 Transformed chlorophyll absorption ratio index (TCARI) $3\times \left[ \left( \text{NIR}-\text{RED} \right)-0.2\times \left( \text{NIR}-\text{GREEN} \right)\left( \text{NIR}/\text{RED} \right) \right]$ Haboudane, et al.[22]
12 Triangular vegetation index (TVI) $\left[ 120\times \left( \text{NIR}-\text{GREEN} \right)-200\times \left( \text{RED}-\text{GREEN} \right) \right]/2$ Broge, Leblanc[23]