奈曼旗玉米残茬覆盖度计算方法及其对土壤风蚀量计算的影响

王飞翔, 甄天乐, 李继峰, 李慧茹, 郭中领, 常春平, 张夏蕾, 于凯昕

Calculation method of maize residue coverage in Naiman Banner and its influence on the calculation of soil wind erosion rate

Feixiang Wang, Tianle Zhen, Jifeng Li, Huiru Li, Zhongling Guo, Chunping Chang, Xialei Zhang, Kaixin Yu

表2 Sentinel-2A光谱指数与玉米残茬覆盖度回归分析

Table 2 Regression analysis of Sentinel-2A spectral index and maize residue coverage

光谱指数	基于Sentinel-2A影像的指数计算公式	回归方程	n	R²	RMSE/%
NDI₁	NDI₁= $\frac{B_{10} - B_{8 a}}{B_{10} + B_{8 a}}$	FVC=-0.0024NDI₁+0.1489	36	0.54	8.08
RI	RI= $\frac{B_{12}}{B_{4}}$	FVC=0.4418RI+93.319	36	0.52	8.24
NDI₂	$N D I_{2} = \frac{l g \frac{1}{B_{10}} - l g \frac{1}{B_{9}}}{l g \frac{1}{B_{10}} + l g \frac{1}{B_{9}}}$	FVC=0.0031NDI₂-0.1244	36	0.50	8.45
DFI	DFI=100 $\times$ (1-B₁₂/B₄)/B₈	FVC=0.097DFI+47.154	36	0.47	8.64
CAI	CAI=0.5 $\times$ (B₁₂+B₁)-B₆	FVC=1.344CAI-0.07	36	0.77	5.77