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5 基于RNDRE和RNDVI时序曲线特征参数的冬小麦单产预测模型

Table 5 The characteristic parameters of time-series RNDRE and RNDVI curve based prediction models of winter wheat yield

植被指数 Vegetation index 特征参数 Characteristic parameter 单产预测模型 Yield prediction model R2 RRMSE (%) RE (%) AIC RNDRE 最大值 Maximum y = 8.72x - 1.37 0.80 10.2 12.9 62.29 累积值 Accumulative value y = 14.39x - 1.22 0.82 9.9 12.9 60.41 增长速率 Increase rate y = 3.32x + 1.38 0.82 9.9 12.8 60.35 下降速率 Decrease rate y = 3.73x - 0.75 0.73 12.0 14.3 71.98 RNDVI 最大值 Maximum y = 14.24x - 7.03 0.77 11.0 13.4 66.48 累积值 Accumulative value y = 18.24x - 4.58 0.80 10.2 12.9 62.18 增长速率 Increase rate y = 4.82x - 0.02 0.81 10.2 12.8 61.84 下降速率 Decrease rate y = 5.04x - 3.72 0.22 20.3 25.6 103.41