Dan Liu, Haizhu Liao

（College of Mathematics and Computer Science, Hanjiang Normal University）  

Abstract：

The impact of climate change on China's food production has received high attention and many research results have been formed, but the assessment results of the impact are somewhat controversial. The author integrated and sorted out hundreds of high-quality domestic and foreign literature since the 21st century, and summarized and discussed the impact of climate change on China's food production. Research has shown that since 1961, climate change has mainly affected China's food production by affecting crop growth and development, causing changes in planting structure, exacerbating agricultural pests and diseases, and meteorological disasters. The impact results coexist positively and negatively, with the negative effect of rising temperatures being the most significant. There are regional differences in the impact of climate change on food production. In high latitude areas such as the Northeast and Northwest oases, rising temperatures have improved regional heat conditions, leading to an increasing trend in food production; In the North China Plain, the southern rice region, the southwest region and the northwest dry farming region, the increase in temperature shortens the crop growth period, coupled with the change in precipitation, resulting in a decline in regional grain production. Without considering the effect of CO₂ fertilizer, future climate change is likely to cause a decrease in grain production, and the reduction in wheat production may be higher than that of rice and corn; Considering the effect of CO₂ fertilizer, the negative impact will be weakened, and may have a positive impact on rice in Northeast China and wheat in North China Plain.  

Key Words：

climate change; grain production; influence; regional differences; CO₂ fertilization effect; literature review