不同灌溉条件下冬小麦冠层含水量的光谱响应

孙乾,顾晓鹤,孙林,王淼,周龙飞,杨贵军,李卫国,束美艳

Spectral Response Analysis of Canopy Water Content of Winter Wheat Under Different Irrigation Conditions

Qian SUN,XiaoHe GU,Lin SUN,Miao WANG,LongFei ZHOU,GuiJun YANG,WeiGuo LI,MeiYan SHU

表2 原始光谱以及小波系数与冠层等效水厚度相关系数绝对值最大值

Table 2 Maximum absolute value of correlation coefficients of original spectra and wavelet coefficients with EWTc

分解尺度 Decomposition scale ∣R∣最大值 Maximum absolute value of R 波长 Wavelength (nm) 提高幅度 Increase range (%) 原始光谱 Original spectra 0.5167 1946 — 1 0.6521 1222 26.2048 2 0.6353 1596 22.9534 3 0.5601 1595 8.3995 4 0.5064 734 -1.9934 5 0.5727 2418 10.8380 6 0.6355 2400 22.9921 7 0.6004 2397 16.1990 8 0.4664 1316 -9.7349 9 0.4508 474 -12.7540 10 0.2736 2345 -47.0486