Research on Response Characteristics of Grain Output to Climate Change ……

It is a significant social problem for nation and people to guarantee grain security. Climate change cause the grain output fluctuating by affecting the growth of crops, and the impact of climate change on grain output is the core of the effects of climate change on agricultural production. Taking Tai'an area as an example, the essay analyzes the response characteristics of climate change to grain output with the method of separation of climatic output. The results show that: The grain output sharply increased with 2.8% speeds in Tai'an area, especially in 90's; Climatic output changeing shows a sine function model with a change cycle of 4 to 7 years, and the 90's belongs to the increasing years of weather output, while others are opposite. Moreover, the fluctuation range of corn climatic output is the biggest; The climate sensitivity is different for different grain crops: Precipitation is the first climatic gene to restrain grain production; Wheat output is mainly affected by climate…