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1 不同生育时期植被指数与冬小麦单产的相关关系

Table 1 Coefficients of determination (R2) for the relationship between vegetation indices (NDRE and NDVI) and yield at different growth stages across varieties and years

植被指数 Vegetation index 品种 Variety 样本 Sample 拔节期 Jointing stage 孕穗期 Booting stage 抽穗期 Heading stage 开花期 Flowering stage 灌浆期 Filling stage NDRE 镇麦12 Zhenmai 12 30 0.66 0.89 0.88 0.86 0.89 扬麦23 Yangmai 23 30 0.46 0.83 0.82 0.75 0.84 宁麦13 Ningmai 13 30 0.72 0.92 0.92 0.91 0.91 所有品种 All 90 0.60 0.86 0.85 0.81 0.81 NDVI 镇麦12 Zhenmai 12 30 0.62 0.79 0.81 0.84 0.83 扬麦23 Yangmai 23 30 0.54 0.79 0.75 0.77 0.75 宁麦13 Ningmai 13 30 0.81 0.86 0.81 0.84 0.85 所有品种 All 90 0.63 0.79 0.77 0.80 0.76