基于冠层时序植被指数的冬小麦单产预测

项方林,李鑫格,马吉锋,刘小军,田永超,朱艳,曹卫星,曹强

Using Canopy Time-Series Vegetation Index to Predict Yield of Winter Wheat

XIANG FangLin,LI XinGe,MA JiFeng,LIU XiaoJun,TIAN YongChao,ZHU Yan,CAO WeiXing,CAO Qiang

表3 不同氮处理下基于RAGDD的时序RNDRE和RNDVI曲线拟合参数

Table 3 The fitting parameters of time-series curve of RNDRE and RNDVI based on RAGDD with different nitrogen rates

植被指数 Vegetation index 氮处理 N treatment 曲线参数 Parameters of curves 决定系数 R2 均方根误差 RMSE A1 A2 a b c d RNDRE N0 0.655 0.506 7.10 0.21 11.84 0.84 0.78 0.066 N1 0.876 0.714 8.97 0.27 14.25 0.85 0.91 0.063 N2 0.969 0.791 11.42 0.28 15.04 0.88 0.96 0.047 N3 0.988 0.786 12.74 0.28 15.51 0.90 0.97 0.043 N4 0.995 0.788 12.70 0.28 15.10 0.90 0.97 0.043 RNDVI N0 0.837 0.668 5.85 0.18 14.29 0.86 0.79 0.082 N1 0.956 0.785 8.80 0.23 15.70 0.88 0.91 0.062 N2 0.987 0.776 11.59 0.23 16.60 0.92 0.94 0.053 N3 0.997 0.760 12.29 0.24 16.22 0.93 0.96 0.044 N4 0.996 0.754 12.46 0.24 15.84 0.93 0.95 0.045