Influence of Meteorological Anomaly Indices on Grain Yield of Four Provinces in East China

In order to study the influences of meteorological factors on Shanghai city, Jiangsu province, Zhejiang province and Anhui province´s grain yield, this article calculated and compiled the daily four hour point data of meteorological factors such as temperature, wind speed, relative humidity and atmospheric pressure in 2001 to 2005, created the meteorological anomaly values and abnormal indices, collected data of crops such as yield, labor, area, fertilizer inputs in the same period, using the Cobb-Douglas-Climate production functions, comparative analyzed the influence of these abnormal meteorological indices on the grain yield.