基于高光谱数据的玉米叶面积指数和生物量评估

基于高光谱数据的玉米叶面积指数和生物量评估

束美艳, 陈向阳, 王喜庆, 马韫韬

Estimation of Maize Leaf Area Index and Aboveground Biomass Based on Hyperspectral Data

Meiyan SHU, Xiangyang CHEN, Xiqing WANG, Yuntao MA

表 1 本研究中使用的高光谱植被指数

Table 1 Hyperspectral vegetation indices used in the research

植被指数	计算公式	参考文献
DDI	DDI= (R₇₅₀-R₇₂₀) - (R₇₀₀-R₆₇₀) (3)	[26]
GNDVI	GNDVI = (R₇₅₀-R₅₅₀)/(R₇₅₀+R₅₅₀) (4)	[27]
MCARI	MCARI = [(R₇₅₀-R₇₀₅)-0.2×(R₇₅₀-R₅₅₀)]×(R₇₅₀/R₇₀₅) (5)	[28]
MND705	MND705 = (R₇₅₀-R₇₀₅)/(R₇₅₀+R₇₀₅-2×R₄₄₅) (6)	[29]
MSR	MSR = (R₇₅₀/R₇₀₅-1)/sqrt(R₇₅₀/R₇₀₅+1) (7)	[28]
MSR705	MSR705 = (R₇₅₀-R₄₄₅)/(R₇₀₅-R₄₄₅) (8)	[29]
MTCI	MTCI = (R₇₅₀-R₇₁₀)/(R₇₁₀-R₆₈₀) (9)	[30]
NDI [759,732]	NDI [759,732] = R₇₅₉-R₇₃₂ (10)	[31]
NDI [860,560]	NDI [860,560] = R₈₆₀-R₅₆₀ (11)	[32]
NDI [860,720]	NDI [860,720] = R₈₆₀-R₇₂₀ (12)	[33]
NDVI705	NDVI705 = (R₇₅₀-R₇₀₅)/(R₇₅₀+R₇₀₅) (13)	[29]
NDVI780	NDVI780 = (R₇₈₀-R₇₁₀)/(R₇₈₀-R₆₈₀) (14)	[34]
NDVI850	NDVI850 = (R₈₅₀-R₇₁₀)/(R₈₅₀-R₆₈₀) (15)	[34]
NDVI760	NDVI760 = (R₇₆₀-R₇₀₈)/(R₇₆₀+R₇₀₈) (16)	[35]
NDVI780	NDVI780 = (R₇₈₀-R₅₅₀)/(R₇₈₀+R₅₅₀) (17)	[27]
NDVI800	NDVI800 = (R₈₀₀-R₇₀₀)/(R₈₀₀+R₇₀₀) (18)	[36]
SRI [750,705]	SRI [750,705] = R₇₅₀/R₇₀₅ (19)	[36]
SRI [768,750]	SRI [768,750] = R₇₆₈/R₇₅₀ (20)	[37]
SRI [777,759]	SRI [777,759] = R₇₇₇/R₇₅₉ (21)	[38]
SRI [810,560]	SRI [810,560] = R₈₁₀/R₅₆₀ (22)	[38]
SRI [810,660]	SRI [810,660] = R₈₁₀/R₆₆₀ (23)	[32]