基于叶片反射光谱估测水稻氮营养指数

徐浩聪,姚波,王权,陈婷婷,朱铁忠,何海兵,柯健,尤翠翠,吴小文,郭爽爽,武立权

Determination of Suitable Band Width for Estimating Rice Nitrogen Nutrition Index Based on Leaf Reflectance Spectra

XU HaoCong,YAO Bo,WANG Quan,CHEN TingTing,ZHU TieZhong,HE HaiBing,KE Jian,YOU CuiCui,WU XiaoWen,GUO ShuangShuang,WU LiQuan

表2 本研究采用的高光谱指数列表

Table 2 List of hyperspectral indices used in this study

光谱指数 Spectral index 计算公式 Algorithm 参考文献 Reference 比值光谱指数 Simple ratio spectral index (SR) R1 / R2 本研究 This study 归一化差值光谱指数 Normalized difference spectral index (ND) (R1 - R2)/(R1 + R2) 本研究This study 修正红边归一化指数 Modified red edge normalized difference vegetation index (MSR 705) (R750-R705)/(R750+2×R445) [12] 红边归一化指数 Red edge normalized difference vegetation index (ND 705) (R750- R705)/(R750+ R705) [13] 比值指数-ldB Ratio index-1dB (RI-ldB) R735 /R720 [14] Vogelmann 红边指数 Vogelman red edge index (VOG) R740 / R720 [15] 双峰冠层氮指数 Double-peak canopy nitrogen index (DCNI) (R720-R700)/(R700-R670)/(R720-R670+0.03) [16] 线性内插法红边位置 Red edge position: linear interpolation method (REPLI) 700+40×[(R670+R780)/2-R700] /(R740-R700) [17] 比值植被指数II Ratio Vegetation Index Ⅱ(RVI Ⅱ) R810 / R560 [18]