基于高光谱数据的滴灌甜菜叶片全氮含量估算

李宗飞,苏继霞,费聪,李阳阳,刘宁宁,戴宇祥,张开祥,王开勇,樊华,陈兵

Estimation of total nitrogen content in sugarbeet leaves under drip irrigation based on hyperspectral characteristic parameters and vegetation index

Zong-Fei LI,Ji-Xia SU,Cong FEI,Yang-Yang LI,Ning-Ning LIU,Yu-Xiang DAI,Kai-Xiang ZHANG,Kai-Yong WANG,Hua FAN,Bing CHEN

表3 已知高光谱植被指数与全氮含量的相关性

Table 3 Correlation between known hyperspectral vegetation index and total nitrogen content

植被指数 Vegetation index 计算公式 Calculation formula 相关关系Correlation 文献来源 Source of literature RSI R990/R720 0.528** [23] NDSI (R860-R720)/(R860+R720) 0.582** [23] NDVI (R790-R670)/(R790+R670) 0.332** [24] FD-NDVI (R730-R525)/(R730+R525) 0.451** [25] RENDVI (R750-R705/( R750+ R705) 0.367** [26] mND705 (R750-R705)/(R750+2R445) 0.360** [27] GNDVI (R790-R550)/(R790+R550) 0.464** [28] SAVI 1.5(R870-R680)/(R870+R680+0.5) 0.692** [29] OSAVI (1+0.16)(R810-R680)/(R810-R680+0.16) 0.633** [30] MSAVI 0.5{2R800+1-[(2R800+1)2-8(R800-R670)]0.5} 0.623** [31] DCNI (R720-R700/(R700-R670)/(R720-R670+0.03) 0.460** [32] CIgreen [(R840-R870)/R550]-1 -0.493** [33] NINI [lg(1/R1510)-lg(1/R1680)]/[lg(1/R1510)+lg(1/R1680)] 0.553** [34] TVI 0.5[120(R750-R550)-200(R670-R550)] 0.538** [35] DSI R800-R680 0.510** [36]