冬小麦生物量及氮积累量的植被指数动态模型研究

吴亚鹏,贺利,王洋洋,刘北城,王永华,郭天财,冯伟

Dynamic model of vegetation indices for biomass and nitrogen accumulation in winter wheat

Ya-Peng WU,Li HE,Yang-Yang WANG,Bei-Cheng LIU,Yong-Hua WANG,Tian-Cai GUO,Wei FENG

表2 不同时期植被指数与小麦产量间线性决定系数(n = 50)

Table 2 Linear determination coefficients between vegetation indices and yield at different stages in wheat (n = 50)

植被指数 Vegetation index	越冬期 Wintering	返青期 Regreening	拔节期 Jointing	孕穗期 Booting	抽穗期 Heading	开花期 Anthesis	灌浆前期 Initial-filling	灌浆中期 Mid-filling	灌浆后期 Late-filling
mRER	0.005	0.454^***	0.817^***	0.815^***	0.862^***	0.800^***	0.781^***	0.669^***	0.358^***
CI_red-edge	0.328^***	0.604^***	0.830^***	0.825^***	0.845^***	0.829^***	0.836^***	0.681^***	0.360^***
NDSI	0.022	0.211^***	0.681^***	0.813^***	0.871^***	0.807^***	0.827^***	0.739^***	0.592^***
SAVI (825, 735)	0.325^***	0.649^***	0.825^***	0.833^***	0.876^***	0.847^***	0.867^***	0.736^***	0.341^***