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4 不同氮素水平下RNDRE和RNDVI时序曲线特征参数

Table 4 The characteristic parameters of time-series curve of RNDRE and RNDVI with different nitrogen levels

氮处理 N treatment RNDRE RNDVI 最大值 Maximum 累积值 Accumulative value 增长速率 Increase rate 下降速率 Decrease rate 最大值 Maximum 累积值 Accumulative value 增长速率 Increase rate 下降速率 Decrease rate N0 0.582 0.349 0.721 1.187 0.750 0.456 0.772 1.693 N1 0.809 0.464 1.245 1.841 0.911 0.558 1.186 2.091 N2 0.931 0.550 1.598 2.037 0.968 0.623 1.396 2.039 N3 0.963 0.580 1.731 2.028 0.981 0.637 1.452 1.983 N4 0.968 0.583 1.737 2.018 0.980 0.639 1.488 1.885