Effects of Climate Change on Yield of Winter Wheat in Shangqiu

The effects of climatic change on winter wheat yield in Shangqiu City are quantitatively analyzed with the predictive results of future climate change. The results show that winter wheat yield in Shangqiu City presented a fluctuated increase for overall trend. Principal component analysis indicates that air temperature, precipitation, evaporation and extreme temperatures are the main factors affecting winter wheat yield, and excessive evaporation and extremely-low temperatures are unfavorable for wheat production. The warm-and-wet climate in Shangqiu is beneficial for improvement of winter wheat production, while the cold-and-dry climate is unbeneficial.