Improvement of Climatic Yield Method Based on HP Filter

Abstract

In the study of climate change impact on grain yield, HP filtering decomposition of HP filter has certain advantages in long time series trend yield fitting process, but HP filtering method can't reflect very well the absolute influence of climate change on the yield. This paper taking Gansu Province as an example, based on the HP filtering method, uses the Baier yield model to calculate the climate yield. The study found that this method can overcome the drawbacks of using HP filter alone, and made the climate yield calculation method reflect the impact of climate change on potato yield more realistically.