基于冠层时序植被指数的冬小麦单产预测
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项方林,李鑫格,马吉锋,刘小军,田永超,朱艳,曹卫星,曹强
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Using Canopy Time-Series Vegetation Index to Predict Yield of Winter Wheat
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XIANG FangLin,LI XinGe,MA JiFeng,LIU XiaoJun,TIAN YongChao,ZHU Yan,CAO WeiXing,CAO Qiang
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表2 基于多元逐步线性回归基的不同生育时期植被指数单产预测模型
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Table 2 Stepwise multiple linear regression models based on vegetation indices for estimating winter wheat yield at different growth stages
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植被指数
Vegetation index | 回归方程
Regression equation | 决定系数
R2 | 相对均方根误差
RRMSE (%) | 相对误差
RE (%) | 赤池信息准则
AIC | | NDRE | y= -2.16x1+16.83x2+9.15x3-4.40x4-2.35x5-0.75 | 0.86 | 8.98 | 9.82 | -97.95 | | y= -2.85x1+17.69x2+5.67x3-3.23x5-0.90 | 0.86 | 8.99 | 9.84 | -99.74 | | y= -2.54x1+21.94x2-2.14x5-0.81 | 0.86 | 9.02 | 9.82 | -101.37 | | y= -2.53x1+19.90x2-0.75 | 0.86 | 9.02 | 9.84 | -103.01 | | NDVI | y=0.14x1+11.23x2-13.22x3+23.12x4-3.57x5-8.31 | 0.81 | 10.41 | 11.70 | -71.45 | | y=11.25x2-13.36x3+23.27x4-3.38x5-8.36 | 0.81 | 10.40 | 11.76 | -73.44 | | y=12.21x2-14.79x3+19.45x4-7.45 | 0.81 | 10.43 | 11.62 | -74.96 |
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