不同生育时期玉米洪涝胁迫遥感监测与评估

隋学艳, 梁守真, 张金盈, 王猛, 王勇, 侯学会, 张晓冬

Remote sensing monitoring on maize flood stress and yield evaluation at different stages

SUI Xue-Yan, LIANG Shou-Zhen, ZHANG Jin-Ying, WANG Meng, WANG Yong, HOU Xue-Hui, ZHANG Xiao-Dong

表3 拔节期和吐丝期洪涝胁迫玉米产量损失率模型

Table 3 Model of maize yield loss rate under flooding stress at jointing stage and silking stage

参数 Parameter 参数计算公式 Parameter calculation formula 拔节期洪涝胁迫玉米产量损失率模型 Model of maize yield loss rate under flooding stress at jointing stage 吐丝期洪涝胁迫玉米产量损失率模型 Model of maize yield loss rate under flooding stress at silking stage DNDVI NDVIafter - NDVIbefore y = -86.051 x2 + 470.53 x + 9.5564 (-0.04 < x < 0.14, 0 < y < 75%) R2 = 0.8969 y = -2803.8 x2 - 586.71 x + 13.8 (-0.07 < x < 0.03, 0 < y < 45%) R2 = 0.9337 DRVI RVIafter - RVIbefore y = -1163.9 x2 - 855.71 x + 9.8187 (-0.09 < x < 0.02, 0 < y < 75%) R2 = 0.8951 y = -9118.2 x2 + 1024.7 x + 13.888 (-0.02 < x < 0.05, 0 < y < 45%) R2 = 0.9320 DSIPI SIPIafter - SIPIbefore y = -19600 x2 - 1985.3 x +15.814 (-0.06 < x < 0.01, 0 < y < 75%) R2 = 0.9433 y = -13599 x2 -814.11 x + 26.53 (-0.03 < x < 0.03, 0 < y < 45%) R2 = 0.9697