Yield estimation model of wheat based on remote sensing data under dif-ferent nitrogen supply conditions
In order to build wheat yield estimation models under different nitrogen levels, and to evaluate the appli?cability of the models between varieties, canopy first?order differential parameters, vegetation index, nitrogen supply and yield data in 2011 from three varieties were used. Totally six yield estimation models were established. The data in 2010 were used for forecast test, and the data in 2011 were used for fitting test. When the modelling and forecast data were from the same variety, the forecast was stable ( R2=0?419) . while the modelling data was from three varieties, the forecast was good as well ( R2=0?405) . When the modelling and forecast data came from different varieties, big difference was presen?ted between fitting and forecast results, suggestive of the poor applicability of the model among varieties. Due to the insignif?icant contribution to the yield estimation model, nitrogen was not included in the six models.
NETL
NSTL
万方数据
维普
